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  • 101.
    Olsson Thor, Johan
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Eriksson, Robert
    Dalarna University, School of Technology and Business Studies, Construction.
    Fuktutredning av massivträkonstruktion: Analys av vägg utan ångspärr2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The report is part of a research and development project for Dalarna University,where the goal is to produce a design without a vapour barrier that will meettoday's measure of airtightness and moisture requirements.

    The purpose of this report is to investigate how moisture affects a building withsolid wood and various insulation materials without vapour barrier. Mineral woolinsulation and wood fiber insulation will be compared against each other to seehow they affect the moisture load in a wall. The test object is located in Dalarna,no additional moisture load affect the indoor environment.

    To carry out this work, three different methods are used. A moisture simulationwas performed using the program WUFI, measured values in terms of relativehumidity and temperature were collected over two years from the wall of thebuilding. A sampling was performed with a physical operation on the same levelin the wall where measurement sensors were placed.

    Results are presented in form of graphs and tables where you can read thecurrent state of the construction in terms of relative humidity, temperature,moisture content and microbiological fouling. Insulation materials demonstrate ahigh relative humidity at outer layers of the construction during the wintermonths. The external environment has been shown to play a major part for theresults. No direct microbiological fouling has been detected despite a highcontent of moisture.

    The result of wood fiber insulation demonstrates a better ability to handlemoisture. A further study with a moisture load and 21 degrees indoors should beperformed. But for this study to work it’s recommended to change the currentfacade solution to a two- step sealed facade solution to manage the moistureload in the wall.

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  • 102.
    Orsén, Mattias
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Bengts, Alfred
    Dalarna University, School of Technology and Business Studies, Construction.
    Att undvika exponering för kvartspartiklar i stendamm: En guide till arbetsledningen vid väg och anläggningsprojekt2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Stone dust exists in all road and public work projects yet the knowledge about how dangerous exposure to the respirable quartz particles that stone dust contains is lower than what could be preferred. The respirable quartz can cause silicosis and lung cancer as well as heart diseases when the capacity of the lungs is reduced. The purpose of this project was to investigate if there is sufficient information and knowledge about quartz in stone dust in this business today. The purpose was also to realize whether there are quartz-prohibiting measures, such as the usage of breathing aid, taken or not. Because of the time-limit of this project much of the gathering of information was limited to “Skanska AB väg och anläggning, region mitt”.

    A survey was produced and used as a method in order to get information about the level of knowledge that Skanska employees have, as well as how good Skanska is at informing their employees, about quartz. This survey was sent to all of Skanska Sweden’s staff members in road and public works, central region. In addition to this, interviews were held with supervisors and managers in the same region. The survey results revealed that most employees have some sort of knowledge about quartz but that the information should be made more extensive and be repeated more often. The results also show that the usage of personal breathing aid is inadequate, this is because the aid is hard to breathe through and during long and warm days they’re an annoyance to wear. In addition, it was also brought to light that not everyone who needs a breathing aid have access to one.

    As another result of the survey and the interviews a guide was made. This guide was formed as a helping hand for the staff management when they’re making risk evaluations and work preparations but also as a short information for all staff members to make it easier for them to remember the easiest and most efficient ways to avoid and protect yourself from quartz particles.

    In the discussion the possibilities about lowering the hygienic limits of quartz for different parts of the economy was debated. A lowering of the hygienic limit in road and public works should lead to more work, such as this, being done towards a better work environment. The knowledge about how personal health is affected by respirable quartz can always get better and that goes especially for employees that work in direct contact with stone dust.

    The conclusions of this project were that employees that are exposed to stone dust should be informed more often, preferably before the start of every project, and also the need for personal breathing aid with appurtenant education should be attended to. Furthermore, the work preparations made with every risk evaluation should always be made by staff members with the same qualifications and information. Thus, all work preparations will look consistent and also, the creation of them will be more time efficient.

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  • 103.
    Palmqvist, Camilla
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Strömeus, Cecilia
    Dalarna University, School of Technology and Business Studies, Construction.
    Behovsstyrd frånluftsventilation: - Jämförelse med två andra ventilationssystem2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today the demands on energy efficiency in the community is getting higher. Buildings and products are becoming more energy efficient. It is possible to influence energy consumption by choosing ventilation systems with lower energy consumption without risking poor air quality.

    The purpose of the study is to compare the demand-controlled exhaust ventilation to exhaust and supply air ventilation with heat exchanger and exhaust ventilation in terms of energy consumption. The study includes simulations in the computer program TMF Energy and studies of a single-family house located in Borlänge. The program has been used as a calculation tool to survey the theoretical specific energy of the three selected ventilation systems. In order to measure the demand-controlled exhaust ventilation an obligatory ventilation control and effect- and comfort measurements was performed. The measurements were made to determine how demand-controlled exhaust ventilation affects the indoor climate and the ventilation rate that is sufficient to maintain good air quality.

    The result shows that demand-controlled exhaust ventilation can reduce energy consumption compared to exhaust ventilation. The result also shows that a low ventilation rate can be sufficient to ventilate a single-family house.

  • 104.
    Pehrson, Oscar
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Sonesson, Johan
    Dalarna University, School of Technology and Business Studies, Construction.
    Analys av omkostnader vid byggande av flerfamiljshus2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The profit margins for companies in the construction sector have been low for a long time even though the market has been good. One explanation for the low profit margins is that costs have increased at the same rate as income. This means that a good control over the finances for a project is essential for the success of a good result.

    At spreadsheet work for a project, it is not the direct costs but the overhead cost that creates uncertainty. Overhead costs can be described simply as the cost of the temporary factory in the workplace and includes rental of equipment, barracks and cost of formwork, clothes etc. Previous projects have shown that the calculated overhead cost and the actual outcome are not always corresponding well.

    When there is uncertainty among calculation engineers and site managers how big the costs are, and under which account every expense should be placed. The purpose of the thesis is to show how the distribution of costs varies between projects. Results will give key indicators that can be used as the basis for future calculations. The key indicators formulated are cost per gross area, cost per profession working hours and cost per apartment. The analysis is focused on the economic outcome of production of seven multifamily houses in central Sweden, where all projects are equal in terms of construction.

    The results gave values of 1320 SEK/gross area, 310 SEK/hour and 143 000 SEK/apartment. The key indicators SEK/gross area and SEK/hour had even values between all projects and are therefore reliable. The key indicator SEK/apartment varied significantly and is therefore not reliable. The reason of the variation is attributed to the fact that some of the projects not only contain apartment, but also offices, business premises and collaboration facilities.

    To get extra accuracy around overhead cost management, there should be a more consistent approach around the concept of overhead cost within the company. Creating a search document will help the site manager’s work with placement of overhead cost. To keep the key indicators updated in the future, there should also be a template created which the site manager fills in at the end of each project. This can be used in experience feedback.

  • 105.
    Petrovic, Bojana
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Myhren, Jonn Are
    Dalarna University, School of Technology and Business Studies, Construction.
    Zhang, Xingxing
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Wallhagen, Marita
    Eriksson, Ola
    Life cycle assessment of a wooden single-family house in Sweden2019In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 251, p. 113-253, article id 113253Article in journal (Refereed)
    Abstract [en]

    To understand the reasons behind the large environmental impact from buildings the whole life cycle needs to be considered. Therefore, this study evaluates the carbon dioxide emissions in all stages of a single-family house in Sweden from the production of building materials, followed by construction and user stages until the end-of-life of the building in a life cycle assessment (LCA). The methodology applied is attributional life cycle assessment (LCA) based on ‘One Click LCA’ tool and a calculated life span of 100 years. Global warming potential (GWP) and primary energy (PE) are calculated by using specific data from the case study, furthermore the data regarding building materials are based on Environmental Product Declarations (EPDs). The results show that the selection of wood-based materials has a significantly lower impact on the carbon dioxide emissions in comparison with non-wood based materials. The total emissions for this single-family house in Sweden are 6 kg CO 2 e/m 2 /year. The production stage of building materials, including building systems and installations represent 30% of the total carbon dioxide equivalent emissions, while the maintenance and replacement part represents 37%. However, energy use during the in-use stage of the house recorded lower environmental impact (21%) due to the Swedish electricity mix that is mostly based on energy sources with low carbon dioxide emissions. The water consumption, construction and the end-of-life stages have shown minor contribution to the buildings total greenhouse gas (GHG) emissions (12%). The primary energy indicator shows the largest share in the operational phase of the house.

  • 106.
    Petrovic, Bojana
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Myhren, Jonn Are
    Dalarna University, School of Technology and Business Studies, Construction.
    Zhang, Xingxing
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Wallhagen, Marita
    Eriksson, Ola
    Life cycle assessment of building materials for a single-family house in Sweden2019In: Energy Procedia, ISSN 1876-6102, Vol. 158, p. 3547-3552Article in journal (Refereed)
    Abstract [en]

    The Nordic countries have shown great interest in using Life Cycle Assessment (LCA) in the building sector compared to the past years. Sweden has set up an objective to be carbon neutral (no greenhouse gas emissions to the atmosphere) by 2045. This paper presents a case study of a single-family house “Dalarnas Villa” in the region Dalarna, Sweden within a 100-year perspective. The assessment is implemented using a new software based on hard data agreed by Environmental Product Declarations (EPDs). It focuses on building materials, transport distances of the materials, and replacement of essential construction materials. The LCA in this study demonstrates the environmental impact related to building materials from production and construction phase including transport, replacement and deconstruction phase. The study does not cover energy use and water consumption. The results show that the building slab made by concrete is the part of the construction most contributing to CO2e, while the wood frame and cellulose insulation have low environmental impact. Replacement of materials takes nearly half of total environmental impact over 100 years. Having a large share of wood-based products, make greenhouse gas emissions remains low.

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  • 107.
    Pettersson, Andreas
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Danielsen, Carl
    Dalarna University, School of Technology and Business Studies, Construction.
    Jämförelse av fuktskydd för träsyllar: Fallstudie av fem stycken fuktskyddande åtgärder2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Vid byggnation av hus med träregelstomme monteras en liggande regel på en

    betongplatta, en så kallad syll. Syllen är oskyddad under lång tid av byggtiden

    och kan då utsättas för nederbörd i form av regn och snö. Fukthalten i syllen får

    inte vara för stor när väggbeklädnad monteras för att fukten skall ha en chans att

    torka ut vilket annars kan orsaka mögelpåväxt med konsekvenserna att den

    huvudsakliga funktionen blir sämre genom att svampar bryter ned träets fibrer.

    Dessutom kan dålig lukt uppstå.

    Det finns möjlighet att montera fullskaligt väderskydd under byggtiden för att

    säkerställa torr miljö, men då detta är en stor kostnad är det få husbyggare som

    väljer detta alternativ.

    Syftet med detta examensarbete är att analysera och jämföra olika typer av

    fuktskyddslösningar för syllen under byggskedet. Respektive lösning kommer att

    utvärderas och jämföras utifrån i examensarbetets framtagna

    jämförelseparametrar.

    Resultatet visade att varianterna med en obehandlad syll av sibirisk lärk och en

    syll från Kebony visade sig ge bra beständighet mot fukt. Den av sibirisk lärk

    värderades högre då produkten från Kebony inte är beprövad under längre tid

    och behöver analyseras mer ingående.

    Det visar sig att olika omfattning av fuktpåverkan alltid förekommer, men dess

    skadeverkan är av olika omfattning och att det kan accepteras i sådan

    utsträckning att inte konstruktion eller människor tar skada.

    Viktiga slutsatser från detta projekt är: Det är ovanligt att fuktproblemet i syllarna

    blir omfattande att de ger märkbara problem, men då problem uppstår krävs

    stora och dyra insatser.

    Ytterligare slutsatser är att tätade ändar på syllarna begränsades uppsugningen

    av stående vatten väldigt bra från kortändorna och att vid extrema

    vädersituationer behövs något väderskydd eller annat material som syll för att

    kunna garantera ett fuktsäkert bygge.

  • 108.
    Qvicker, Jesper
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Hassan, Ali
    Dalarna University, School of Technology and Business Studies, Construction.
    Undersökning av dagvattenanläggning: Lokalt omhändertagande av dagvatten i bostadsområde2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In the future we expect a warmer climate and the warmer temperatures will increase the rainfall in Sweden. How we disposes our stormwater have in the recent years got stricter requirements which resulted in new stormwater systems has been put in use. The report describes a stormwater system in a residential area developed by a large building company. In the area the stormwater is been taken care of inside the intended area. With this means that stormwater is being delayed and purified within the affected area. By using the ground conditions in the area together with technical solutions a system has been created to live up to the society’s set requirements. The report describes the sizing methods of stormwater systems that show that small changes in a large system can have a major impact on the functioning of the system. For a system to function for a longer period of time, It’s necessary to maintain the system after a planned maintenances plan witch this report presents. In order for the system to be able to be maintenance effectively in future, the study has developed three proposals for the design of stormwaterwells with associated magazines to facilitate maintenance and reduce flowdisturbances.

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  • 109.
    Ramírez Villegas, Ricardo
    et al.
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Eriksson, Ola
    Högskolan i Gävle.
    Olofsson, Thomas
    Dalarna University, School of Technology and Business Studies, Construction. Umeå universitet.
    Assessment of renovation measures for a dwelling area: impacts on energy efficiency and building certification2016In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 97, p. 26-33Article in journal (Refereed)
    Abstract [en]

    The European Union has an ambitious plan to reduce energy use and emissions by the year 2030. The building and real estate sectors have a great potential to help reduce emissions by energy efficiency. However, different energy sources and environmental standards affect the decision making of these major renovations in the existing stock. This study investigates how different renovation strategies affect the energy rating of a selected Building Environmental Assessment Tool and analyses the consequences in terms of greenhouse gas emissions for the local district heating system. Both building energy simulations and energy systems cost optimization were used to determine the energy use and local emissions. The results of different renovation scenarios were used to evaluate the rating in the selected tool and the impact in the district heating local emissions. The used methodology illustrates how energy efficient renovation impacts on the district heating system’s local emissions. However, a bias towards resource classification within the Swedish Building Environmental Tool, Miljöbyggnad, needs to be addressed in order to assess the impact of local emissions. © 2015 Elsevier Ltd.

  • 110.
    Ranerfors, Viktor
    Dalarna University, School of Technology and Business Studies, Construction.
    VR i byggprojekt: En studie om tillämpning av Virtual Reality i byggprojekt2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis examines how

    Virtual Reality can be applied in a construction project. The purpose is to

    explain how

    Virtual Reality can be used during design and production in a construction project. As BIM

    has a significant role in the digitization of the construction sector, new methods are needed to utilize 3Dand

    BIM-models. VR has proven to be a useful tool for visualizing these models. This is a new and

    innovative technology that requires more research to be utilized on a larger scale. In this study, two

    consultants with experience of VR in construction projects were interviewed, as well as two contractors.

    The interview questions were based on the theoretical framework and the objectives. The result is

    based on the interview study and shows a clear positive attitude towards the use of VR in construction

    projects. The main benefits were the understanding, communication and internal and external

    examination of BIM models. Within the design phase, VR can facilitate decision makings as the

    understanding of the problems increases. The immersive experience in VR feels like experiencing the

    model in real life, which creates a good decision basis in all stages of a construction project. The ease of

    use in the VR environment creates opportunities for all project members to examine a model, regardless

    of technical skill level. Even external examiners can easily check a model in VR. During the production

    phase, VR can be used to increase understanding for each construction worker. The purpose of each

    specific sub operation is clarified, which can contribute to increased dedication and compassion for

    construction workers. A difficulty encountered during this work is the required computer capability to

    achieve a good experience in VR. A compatible equipment is required which makes an investment of

    equipment necessary. A less expensive option exists for those occasions when this investment is not

    relevant. Rendered images from a model can be used with a smartphone and a VR case, for a good but

    easier VR experience. Further the study describes the possibilities VR has in the construction industry.

    Modeling, traffic flow simulations, global cooperation and education appear as future opportunities with

    VR.

    If BIM is used in a project, time and money can be saved. Since VR can be seen as a complement to

    BIM, it can contribute to additional savings as the process becomes more efficient and at the same time

    more qualitative. As VR can save both time and money, each project becomes better and cheaper,

    which in turn affects society at large.

  • 111.
    Ranhagen, Ulf
    Dalarna University, School of Technology and Business Studies, Construction. Chalmers tekniska högskola.
    Co-Creation in Urban Station Communities: Summary of three lectures with a presentation of findings from the Project 2017-20192020Report (Other academic)
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  • 112.
    Ranhagen, Ulf
    Dalarna University, School of Technology and Business Studies, Construction. Dr. Eng., M Arch, Project Leader Centre for Sustainable Urban Futures, Prof em ACE Chalmers, Chief Architect, Sweco Architects.
    Densification of station areas in order to promote sustainable mobility, health, well-being and energy efficiency- opportunities and obstacles. The case study of Mölnlycke urban centre in Gothenburg region, Sweden2020In: IOP Conference Series: Earth and Environment, ISSN 1755-1307, E-ISSN 1755-1315, Vol. 588Article in journal (Refereed)
    Abstract [en]

    The Mistra Urban Futures project “analysis of urban station communities” different forms of co-creation have been a common denominator for transdisciplinary collaboration between a wide range of stakeholders related to a number of planning cases on different levels [13]. Densification in combination with mixed-use, spatial configuration and other aspects, increases the options for sustainable mobility with public transportation, bicycling and walking, thus contributes to at least five of the SDGs: goal 11, goal 3, goal 7, goal 8 and goal 13 [6].The options for densification were extensively investigated during a series of co-creation workshops among stakeholders that are involved with the regeneration of Mölnlycke urban centre, located to the West of the City of Gothenburg. A number of different planning and design tools were used throughout this process. The result of the co-creation is an experience-based assessment of strengths and weaknesses, a desired density structure from different perspectives and evaluated density scenarios for the station area. The co-creative approach using a combination of planning and design tools has the potential to raise a number of different perspectives and experiences of the stakeholders involved, when considering density and associated ecological, socio-cultural and economic factors. The results for this process can serve as a valuable supplement to desk top analysis of density and related factors when planning urban areas around transportation nodes.

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  • 113.
    Ranhagen, Ulf
    et al.
    Dalarna University, School of Technology and Business Studies, Construction. Chalmers tekniska högskola.
    Frostell, Björn
    KTH.
    Conceptualizing Urban Systems for Ecologic Sustainability Assessments: Case Study of the Stockholm Royal Seaport City District2020In: Sustainability Assessment of Urban Systems / [ed] Binder, C., Wyss, R., & Massaro, E., Cambridge: Cambridge University Press , 2020, p. 460-479Chapter in book (Refereed)
    Abstract [en]

    Our world is becoming more urban. More than fifty percent of the global population now lives in cities, which poses new challenges for sustainable development. This book integrates theory and methods of sustainability assessment with concepts from systems science to provide guidelines for assessing the sustainability of urban systems. It discusses different aspects of urban sustainability, from energy and housing, to mobility and health, covering social, economic and environmental factors, as well as the various stakeholders and actors involved. The book argues for the need to find models and solutions in order to design sustainable cities of the future in light of the complexity of urban social life. Including diverse case studies from the developed and developing world, this book provides a useful reference for researchers and students from a broad range of disciplines working in the field of sustainability, as well as for environmental consultants and policy makers.

  • 114.
    Ranhagen, Ulf
    et al.
    Dalarna University, School of Technology and Business Studies, Construction. Chalmers, Göteborg.
    Svensson, Tony
    Dalarna University, School of Technology and Business Studies, Construction. KTH, Stockholm.
    Svenning, Matilda
    Härryda kommun.
    Samskapande samhällsplanering i Landvetter södra: För energieffektiva och hållbara stationssamhällen, Härryda kommun, April 20202020Report (Other (popular science, discussion, etc.))
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  • 115.
    Romppainen, Joel
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Sundberg, Marcus
    Dalarna University, School of Technology and Business Studies, Construction.
    Teoretiska och praktiska tester av byggsystemet Lignea2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Under den senaste tiden har miljömedvetenheten ökat i Sverige och nya miljömål ställer krav på energibesparingar i byggbranschen. Bygg- och fastighetssektorn är den som förbrukar mest av Sveriges totala energianvändning. Minskning av energianvändning och koldioxidutsläpp är ett måste, ifall miljömålen ska uppnås. Nya innovationer och energismarta lösningar för byggnader måste utvecklas och testas för att undersöka möjligheterna och de framsteg de skulle kunna bidra med.Syftet med denna rapport är att ge en utförlig beskrivning av ett nytt byggsystem som kallas Lignea. Lignea är ett byggsystem av förtillverkade trämoduler som riktar sig till produktion av småhus. Byggsystemet eftersträvar att vara ett energieffektivt och miljövänligt alternativ till dagens traditionella byggsystem. Modulerna i byggsystemet Lignea består av trä och isoleringen av träfiberisolering, vilket gör Lignea till ett miljöanpassat byggsystem där ingående material består av naturliga material och skulle kunna återanvändas eller återgå till kretsloppet på olika sätt. Rapporten syftar också till att redovisa resultat och slutsatser av de studier och tester som utfördes på ett testhus uppfört med byggsystemet. Studierna gjordes för att utvärdera byggsystemets täthet, fukt- och värmetekniska egenskaper.Olika metoder användes för att uppnå resultaten för respektive undersöksområde. En fuktsimulering genomfördes i programmet WUFI. Fuktsimuleringen jämfördes sedan mot verkligt uppmätta värden från fyra fuktsensorer inbyggda på olika platser i testhusets väggar, de verkliga mätningarna varade i 21 månader. Tryckprovningsutrustning användes för att undersöka tätheten i konstruktionen samtidigt som testhuset termograferades för att lokalisera luftlekagen. U-värdesberäkningar genomfördes för att undersöka värmegenomgångsmotståndet.Resultatet och slutsatserna grundar sig på teoretiska beräkningar och praktiskt utförda tester som kan användas för att klargöra byggsystemets täthet, fukt- och värmetekniska egenskaper.De verkliga fuktmätningarna visade att den relativa fuktigheten i väggkonstruktionen inte innebär någon risk för byggsystemet. Undersökningarna som genomförts på byggsystemet har resulterat i slutsatser som bidragit till förbättringsförslag och förslag på fortsatta studier av byggsystemet.

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  • 116.
    Räs, Magnus
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Borgvall, Ansgar
    Dalarna University, School of Technology and Business Studies, Construction.
    Ombyggnad av självdragssystem till behovsstyrd ventilation: En fallstudie av ekonomiska och energimässiga effekter i flerbostadshus2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In order to prevent global warming, the Swedish government has placed a number of environmental quality objectives. As the housing and service sector accounts for 40% of Sweden's final energy use, the property and construction industry is largely influenced by environmental work. Sweden has come a long way in building new energy-efficient buildings, but a large part of the existing property stock needs reconstruction both in terms of technical life and energy consumption.

    The report evaluates demand-controlled ventilation as an alternative to existing natural ventilated systems, which is the most common in older buildings. Through a case study on natural ventilated buildings in Borlänge, an energy balance calculation has been prepared to estimate current energy losses through ventilation. Calculations have then been made on energy and economic consequences of the installation of exhaust ventilation and demand-controlled ventilation. Demand control is done with exhaust air dampers that react on

    carbon dioxide (CO2) and air moisture combined with a pressure regulated exhaust fan at the end of the ventilation duct. This ensures that the ventilation level is the same in every apartment.

    The calculations indicate that ventilation flows can be reduced by 30% compared to the new building requirements. Due to high installation costs and generally low flow in naturally ventilated buildings, it’s hard to find profitability if you intend to do this as an individual energy saving measure.

  • 117.
    Rönnelid, Mats
    et al.
    Dalarna University, School of Technology and Business Studies, Energy and Environmental Technology.
    Wik, Tina
    Dalarna University, School of Technology and Business Studies, Construction.
    Janols, Henrik
    Dalarna University, School of Technology and Business Studies, Construction.
    Brännström, Mattias
    Helling, Håkan
    Lövenvik, Tommy
    Passive crosslaminated timber buildings: Final report Cerbof-project no. 762013Report (Other academic)
    Abstract [en]

    In this project, Stora Enso’s newly developed building system has been further developed to allow building to the Swedish passive house standard for the Swedish climate. The building system is based on a building framework of CLT (Cross laminated timber) boards. The concept has been tested on a small test building. The experience gained from this test building has also been used for planning a larger building (two storeys with the option of a third storey) with passive house standard with this building system.

    The main conclusions from the project are:

     It is possible to build airtight buildings with this technique without using traditional vapour barriers. Initial measurements show that this can be done without reaching critical humidity levels in the walls and roof, at least where wood fibre insulation is used, as this has a greater capacity for storing and evening out the moisture than mineral wool. However, the test building has so far not been exposed to internal generation of moisture (added moisture from showers, food preparation etc.). This needs to be investigated and this will be done during the winter 2013-14.

     A new fixing method for doors and windows has been tested without traditional fibre filling between them and the CLT panel. The door or window is pressed directly on to the CLT panel instead, with an expandable sealing strip between them. This has been proved to be successful.

     The air tightness between the CLT panels is achieved with expandable sealing strips between the panels. The position of the sealing strips is important, both for the air tightness itself and to allow rational assembly.

     Recurrent air tightness measurements show that the air tightness decreased somewhat during the first six months, but not to such an extent that the passive house criteria were not fulfilled. The reason for the decreased air tightness is not clear, but can be due to small movements in the CLT construction and also to the sealing strips being affected by changing outdoor temperatures.

     Long term measurements (at least two years) have to be carried out before more reliable conclusions can be drawn regarding the long term effect of the construction on air tightness and humidity in the walls.

     An economic analysis comparing using a concrete frame or the studied CLT frame for a three storey building shows that it is probably more expensive to build with CLT. For buildings higher than three floors, the CLT frame has economic advantages, mainly because of the shorter building time compared to using concrete for the frame. In this analysis, no considerations have been taken to differences in the influence on the environment or the global climate between the two construction methods.

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  • 118.
    Safaei Astor, Robert
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Kyllönen, Henrik
    Dalarna University, School of Technology and Business Studies, Construction.
    Användning av BIM i mindre anläggningsprojekt2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    I Sverige är kunskapen inom BIM (Building Information Modelling) väldigt varierande, i dagsläget tillämpas arbetssättet främst i de större projekten som till exempel E4 förbifart Stockholm där det finns en större budget. I våra grannländer Norge och Finland har utvecklingen kommit något längre eftersom det ställts högre krav från de statliga beställarna. Det primära syftet med projektarbetet är att reda ut hur BIM kan tillämpas i mindre väg- och anläggningsprojekt, och om det kan göras på ett effektivt och lönsamt sätt i tidiga vägplaneskedet, och i andra hand se över möjligheten att utöka användningen av BIM i ett tidigt vägplaneskede för en GC-väg mellan Tolsbo och Tunet. Metoderna för arbetet bestod främst av litteraturstudier och intervjuer med personer både inom och utanför företaget, tillsammans med programvaruleverantörer och personer från beställarsidan. Metoderna fungerade bra och gav tillförlitliga svar men gav inte det resultat som förväntades i vissa fall. En viktig slutsats med detta arbete är att arbetet med BIM är i en stark utvecklingsfas men att det finns brister i kunskap på beställarsidan, då de inte alltid förstår fördelarna som BIM kan ge in i underhåll och förvaltningsskedet av vägarna. En annan slutsats är att det är viktigt att utveckla standarder och projekteringsmetodiken kring BIM för att göra det mer effektivt och lönsamt.

  • 119.
    Saliba, George
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Welker, Fanny
    Dalarna University, School of Technology and Business Studies, Construction.
    RIKTPRIS I ECI-PROJEKT – KRAV PÅ BIM-MODELLER AVSEENDE DETALJERINGSNIVÅ2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Det här examensarbetet handlar om riktpriset i ECI projekt samt krav på BIM modeller avseende detaljeringsnivåer. Early Contractor Involvement (ECI) är en relativt ny samverkansmodell i Sverige som används av Trafikverket i ett fåtal väldigt stora infrastrukturprojekt. ECI består av två faser och går ut på att beställaren samverkar med entreprenören i ett tidigt skede, fas 1, där entreprenörens kompetens och erfarenhet är värdefull redan i planeringen. Om beställare och entreprenör kommer överens om den ungefärliga kostnaden, riktpriset, för att utföra arbetet enligt fas 1, får entreprenören också utföra arbetet som en totalentreprenad i fas 2. BIM är en viktig pusselbit för framgång i ECI-projekt och kan förbättra samverkan mellan olika aktörer och team i projekteringen. Informationen i modeller kan lätt flyttas mellan team och användas för att förkorta beslutsprocesser. Syftet med examensarbetet är att undersöka vilken detaljeringsnivå i modeller som är nödvändig för ECI-projektets första fas (riktprisfasen), samt undersöka hur Trafikverket ställer krav på BIM och modellers detaljeringsnivåer. Studien genomfördes genom att göra en jämförelse av erhållet riktpris för två brandsläckningssystem med olika detaljeringsnivå (LOD200 och LOD300) i en tunnelmodell. Studien avgränsar sig till endast bruttokostnader för material såsom rör, rörkopplingar och ventiler. Undersökningen visade utifrån mängdförteckningen att riktpriset för modellen med högre detaljeringsnivå (LOD 300) är 95% större än för den lägre nivån (LOD 200). I modellen med LOD 200 beräknades riktpriset enbart på rören vilket gjorde en stor skillnad jämfört med LOD 300 där riktpriset beräknades på rören, rörkopplingar och ventiler. Utifrån det kan slutsatsen dras att en modell med detaljeringsgrad LOD 200 inte innehåller tillräckligt med information för att kunna prissättas utan alltför stor prisavvikelse och risk.

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  • 120.
    Samsvik, Jonas
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Norén, Adam
    Dalarna University, School of Technology and Business Studies, Construction.
    Framtagning av spännviddstabell för ribbdäcksbjälklag2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of the degree project is to find a calculation path for ribbed deck joists so that a span width table can be created. A ribbed deck joists consists of standing glulam beams with a lying cross laminated timber slab above which functions as a floor. In this thesis, the cross laminated timber board is 2.4 meters wide and rests on two glulam beams. Full cooperation between the different materials prevails. Today, there are some players in the market that deliver these types of floor but there is no calculation rate specified in Eurocode. The preliminary study for the degree project has shown that the approach to solving the most problematic calculation has been the same for the companies we have looked at. The difficulty is to calculate the effective width of the cross section. There are also different standards that apply to how large the deflection may be for a beam. In the thesis work, calculations are performed to meet the requirements that apply in Sweden and the requirements that apply in Austria. Dimensions must be specified in the table for fulfilling the respective requirements. The Austrian requirements have proved to be harder compared to the Swedish ones and will therefore require a beam of greater dimension in the lower load cases. In case with the larger loads, the beam dimensions between the different loads will not differ because it has been shown that the fire has been dimensional. The table should be a tool for the company Dala massivträ to reach the customer more easily.

    The calculation path has been made in Mathcad, where unknown parameters has been solved and calculated. Some parameters have been fixed based on Dala massivträ´s wishes, such as the thickness of the cross laminated timber board and the material properties of the component parts. Once the calculations have been made, they have been checked so that torque capacity and transverse power capacity are sufficient in the respective load cases and span. The deflection has been checked as well as the fire dimensioning. The flooring has not fulfilled the dimensioning or the requirements for Swedish standard alt. Austrian standard has a higher dimension selected on the glulam beam. Glulam beam has been selected based on Setra's wood products standard range.

    The result of the calculations has been entered into a span table which has been built up in order to be able to easily select the beam from outside the intended load case. The calculation example is presented in an annex where a load case and a span are reported. The result is that each span and load fall get two dimensions, one to meet the Swedish standard and one to cope with the Austrian standard.

    In the discussion, is discussed possible sources of error, the effect of denser placement with glulam beams and the cause of a difference in the comparison between Mathcad and Calculatis. The result in the span table is also discussed.

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  • 121.
    Samuelson, Anna
    Dalarna University, School of Technology and Business Studies, Construction.
    Utformning av ny butik i Sunne: Arkitektritning2016Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    The project work includes project planning, structural engineering and construction. The report contains a new proposal of how to build a completely new business premises. The proposal solves the lack of commercial space and parking for Ica Sunne who wants to develop their business. This project is part of "fair trading" because other shops in the centre have parking near their stores. It is impotrant for the whole centre that ICA maintain their business operations in central Sunne. The project work includes research and interviews compiled into a final architectural drawings for the business requirements and the model of a new commercial building with apartments on the second and third floor and the design of new parking lots. The exterior is of importance since it must comply with the existing built environment. The goal is to eventually try to implement this project.

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  • 122.
    Sandholm, Victor
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Tottmar, Anders
    Dalarna University, School of Technology and Business Studies, Construction.
    Effektiv logistik i byggbranschen: Lösningsguide för att undvika vanligt förekommande logistiska utmaningar2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Logistics is a very wide concept that affects almost all areas regarding building projects. Logistics can briefly be described as the transportation of favors and products from start to finish, it is unfortunately also something that businesses tend to look past to a certain degree thus undermining its actual importance, primarily because of deadlines and time limits. Good solutions regarding logistics is the foundation that later on enables work to run smooth and efficiently, this in return means that a lot of times the whole purpose of saving time by not developing a good logistic system for the project, becomes contra-productive.  The following study pinpoints important areas regarding logistics in the building industry. Working with logistic solutions has become a tool to achieve a more competitive status in today’s society, and an increased efficiency in this area can reduce prices and time limits by a lot. These past two decades logistic consulting corporations have almost become a natural part of building projects, thanks to the increased complexity of administrative tools these sometimes need to be hired for a project to work smooth with all the involved entrepreneurs.  The following essay is based on an objective description regarding the whereabouts of the biggest, and the most usual logistic flaws in the building industry. Why are these common? And how are they counteracted to minimize the time economical aspects?  These solutions are produced to minimize common faults in the industry, to later be applied in a case study. After the factions are compared, the results themselves can be further compared to see if their concepts matches the actual reality. In its whole this can be summarized by that the case study’s approach was analyzed and compared to what in theory could be viewed as the optimal solutions.   It has shown that Bonava’s strategy closely relates to the existing theories, and that these in reality could lay ground for other successful project like Elitroddaren. However there are some minor faults in the case study which could have been implemented in a more efficient manner, for an even better result

  • 123.
    Sandén, Efraim
    Dalarna University, School of Technology and Business Studies, Construction.
    Hastighetsdämpande åtgärder: En studie om olika aspekter på planering och projektering av hastighetsdämpande åtgärder.2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Traffic calming measures are found throughout Sweden, many of the existing ones have been built by municipalities. What is the passability of ambulance and fire brigade for traffic calming measures? This master thesis looks at how municipalities think when they are planning and projecting / building traffic calming measures, and how passability is for ambulance and fire brigade. It is different between the country's municipalities as to which dialogues they have before making a traffic calming measure. It is also different from what makes a municipality build a traffic calming measure. Municipalities use different approaches to project a traffic calming measure. According to the questionnaire survey, the municipalities favored a regulation for traffic calming measures. According to the survey, it was found that the passability of traffic calming measures is not such a big problem for ambulance and fire brigade. Largest problem with passability have ambulance and fire brigade when there is a lot of traffic and queues. Of the traffic calming measures available, bumps have the biggest negative impact on the passability of ambulance and fire brigade, so it is important to consider the design of bumps.

     

  • 124.
    Sarhatlić, Nerim
    Dalarna University, School of Technology and Business Studies, Construction.
    Identifiering och kartläggning av buller i centrala Falun2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A problem in today's modern society is that the noise levels are too high. These high levels of noise is a health hazard and can give man permanent damage. Noise pollution is something that must not be neglected.

    The purpose of this study is to identify and map the noise on Holmgatan in central Falun. The purpose is also to analyze the results and put them in relation with the regulatory requirements and guidelines regarding noise levels and to analyze the results and see if actions should be taken against the noise on Holmgatan.

    The thesis is limited to noise measurements and mapping of parts of Holmgatan, considered to be especially vulnerable to noise. Noise measurements were conducted during four weekdays and during times from when most stores open to most of them then closing, at. 10-18.

    The method consisted of noise measurements which were performed at hourly intervals along the selected portion of Holmgatan. The days on which these measurements were performed was from 2/12 to 5/12-2013.

    The results are reported as average value per hour of any day on which noise measurements were made. The results varied, the lowest average noise was 57 dB and the highest average noise was 83 dB. It is clearly seen that the higher values are closer to a street used by buses and other transport vehicles. The lower values were generally near Geislerka parken, which is a large garden, an open area in the middle of Holmgatan. Overall, the average noise values were between 60-65 dB.

    The conclusion suggests that the noise level at Holmgatan do not exceed regulatory requirements on what is considered as harmful but it is just below the guidelines for the maximum level of outdoor noise (70 dB). Actions such as planting vegetation on the facades and to redirect the traffic could be done to reduce noise levels at Holmgatan.

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  • 125.
    Sattari, Amir
    Dalarna University, School of Technology and Business Studies, Construction. KTH.
    Particle image velocimetry visualization and measurement of airflow over a wall-mounted radiator2015In: The International Journal of Ventilation, ISSN 1473-3315, E-ISSN 2044-4044, Vol. 14, no 3, p. 289-302Article in journal (Refereed)
    Abstract [en]

    A common room-heating technique involves the use of a wall-mounted radiator without forced convection. The cold surrounding air passes adjacent to the warm surfaces of the radiator where it absorbs heat and gains momentum to rise along the wall surface and finally circulate in the entire room. Understanding the properties of heated airflows is important for several purposes. To understand the flow process it is important to identify where the transition from laminar to turbulent flow occurs and to quantify the turbulent fluctuations. With the objective to characterize the airflow in the vicinity of wall surfaces, the local climate over the radiator was visualized and measured using a two-dimensional particle image velocimetry technique. The PIV technique yields 2D vector fields of the flow. The resulting vector maps were properly validated and post-processed using in-house software to provide the average streamlines and other statistical information such as standard deviation, average velocity, and covariance of the entire vector field. The results show that, for a room with a typical heating power, the airflow over the radiator becomes agitated after an ordinate of N = 5 - 6.25 over the radiator upper level, in which N is the dimensionless length based on the thickness of the radiator. Practical problems encountered in near-wall PIV measurements include generating a homogeneous global seeding that makes it possible to study both plume and entraining region, as well as optical problems due to near-surface laser reflection that makes the measurement process more complicated.

  • 126.
    Selo, Jovan
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Tayfur, Bora
    Dalarna University, School of Technology and Business Studies, Construction.
    Frånluftsåtervinning i ett äldre flerfamiljehus: Hovgården - Borlänge2013Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this thesis, we have studied a building located in Hovgården in Borlänge. The report investigates two energy saving installations that can help to reduce the amount of oil used today in the house. The purpose of the report was to examine the possibilities and viability of exhaust heat pump (FVP) and VBX module that can recover heat from the exhaust air. The investigation showed that neither VBX nor FVP can replace the oil-fired boiler in an acceptable way. With VBX the COP of the existing heat pump is increased from 2.8 to 3.11 leading to 17 MWh/year electricity saving. However FVP can recycle 59 MWh/year from the exhaust air but still cannot cover the power demand of the building during the coldest days. The result was that the two investigated systems are not able to replace oil heating.

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  • 127.
    Shen, Jingchun
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Copertaro, Benedetta
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Sangelantoni, L.
    University of L'Aquila, Italy.
    Zhang, Xingxing
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Suo, H.
    Guangzhou University, Guangzhou, China.
    Guan, X.
    Guangzhou University, Guangzhou, China.
    An early-stage analysis of climate-adaptive designs for multi-family buildings under future climate scenario: Case studies in Rome, Italy and Stockholm, Sweden2020In: Journal of Building Engineering, E-ISSN 2352-7102, Vol. 27, article id 100972Article in journal (Refereed)
  • 128.
    Shen, Jingchun
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Copertaro, Benedetta
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Zhang, Xingxing
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Koke, Johannes
    Kaufmann, Peter
    Krause, Stefan
    Exploring the potential of climate-adaptive container building design under future climate scenarios in three different climate zones2020In: Sustainability, E-ISSN 2071-1050, Vol. 12, no 1, article id 108Article in journal (Refereed)
    Abstract [en]

    The deployment of containers as building modules has grown in popularity over the past years due to their inherent strength, modular construction and relatively low cost. The upcycled container architecture is being accepted since it is more eco-friendly than using the traditional building materials with intensive carbon footprint. Moreover, owing to the unquestionable urgency of climate change, existing climate-adaptive design strategies may no longer respond effectively as they are supposed to work in the previous passive design. Therefore, this paper explores an adaptive upcycled strategy of shipping containers as a carbon-smart modular living solution to a single family house under three design scenarios related to cold, temperate and hot-humid climatic zones, respectively. By assessing the projected future climate data with the ASHRAE Standard 55 and Current Handbook of Fundamentals Comfort Model, it was found that Rome would gradually face more failures in conventional climate adaptive design measures in the coming 60 years. The appropriate utilization of internal heat gains seems to be the most promising measure in Rome, followed by the measure of windows sun shading and passive solar direct gain by using low mass. Weather analysis shows different results in Berlin and Stockholm, where special attention should be paid to the occasional overheating risk. As a result, the holistic climate-adaptive container building design measures are finally summarized from aspects of design features, production / process and challenges in implementation.

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    Exploring the Potential of Climate-Adaptive Container Building Design under Future Climates Scenarios in Three Different Climate Zones
  • 129.
    Sundholm, Sebastian
    Dalarna University, School of Technology and Business Studies, Construction.
    Energirenovering av befintliga bostadsbeståndet för att uppnå energi- och miljömål för 2020, 2030 och 20502018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The study aim to examine how Sweden's existing housing stock needs to adapt to achieve the objectives and agreements signed to counteract climate change as well as, what specific measures should be prioritized in order to achieve the objectives within the set timeframe. To answer the purpose, the study has used theoretical and real objects where extensive energy savings have been performed. This potential has been applied to the entire housing stock and its environmental impact has been calculated.The study focused on the category of single-family homes and apartment buildings. The results showed that when all renovation measures were applied, greenhouse gas emissions fell by 88% from 1990 years, energy efficiency increased by 47% from 2016 years, and the share of renewable energy was considered to continue to increase. The proportion of fossil fuels was relatively large 1990 for heating homes and hot water that were phased out to more environmentally friendly alternatives over time. This meant that 2016 was the housing stock were significantly below the targets set for greenhouse gas emissions for years 2020 and 2030 i.e. The targets were already fulfilled in 2016. However, the target for 2050 was set at a reduction of at least 80%, which meant that all the measures for reducing energy consumption in the study needed to be used to reduce greenhouse gas emissions to set targets.The study shows that all the goals that Sweden has adopted can be achieved or achieve great improvement as all of the study's energy saving and carbon reduction proposals are implemented.

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  • 130.
    Sundholm, Sebastian
    Dalarna University, School of Technology and Business Studies, Construction.
    Energirenovering av befintliga bostadsbeståndet för att uppnå energi- och miljömål för 2020, 2030 och 20502018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The study aim to examine how Sweden's existing housing stock needs to adapt to achieve the objectives and agreements signed to counteract climate change as well as, what specific measures should be prioritized in order to achieve the objectives within the set timeframe. To answer the purpose, the study has used theoretical and real objects where extensive energy savings have been performed. This potential has been applied to the entire housing stock and its environmental impact has been calculated.The study focused on the category of single-family homes and apartment buildings. The results showed that when all renovation measures were applied, greenhouse gas emissions fell by 88% from 1990 years, energy efficiency increased by 47% from 2016 years, and the share of renewable energy was considered to continue to increase. The proportion of fossil fuels was relatively large 1990 for heating homes and hot water that were phased out to more environmentally friendly alternatives over time. This meant that 2016 was the housing stock were significantly below the targets set for greenhouse gas emissions for years 2020 and 2030 i.e. The targets were already fulfilled in 2016. However, the target for 2050 was set at a reduction of at least 80%, which meant that all the measures for reducing energy consumption in the study needed to be used to reduce greenhouse gas emissions to set targets.The study shows that all the goals that Sweden has adopted can be achieved or achieve great improvement as all of the study's energy saving and carbon reduction proposals are implemented.

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  • 131.
    Sundkvist, Niklas
    Dalarna University, School of Technology and Business Studies, Construction.
    Attraktiva egenskaper hos lägenheter: En studie om vad byggherren, projektörer och entreprenörer bör tänka på vid nybyggnation eller renovering av flerbostadshus2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Det råder idag en stor bostadsbrist i Sverige och detta på grund av urbanisering,

    dvs. en stor befolkningsökning i städerna. Det betyder att mycket bostäder

    behöver byggas och då är det viktigt att projektörerna vet vad de

    bostadssökande vill ha när det gäller lägenheter.

    Som huvudsyfte för arbetet står att samla information och få en bild av vad de

    bostadssökande söker när de letar lägenheter. Resultatet av detta kan fungera

    som ett underlag för kommande lägenhetsbyggnationer och renoveringar. Ett

    sekundärt syfte är att med hjälp av insamlad och analyserad data ta fram en

    principskiss på hur en lägenhet skulle kunna se ut och denna ska även stämma

    överens med dagens byggnormer.

    I rapporten har en lägenhet tagits fram baserat på svaren från en

    enkätundersökning, tre intervjuer med mäklare och intervju med det kommunala

    bostadsbolaget Tunabyggen i Borlänge samt gällande krav och byggregler i

    BBR.

    De viktigaste slutsatserna i rapporten är att pris och månadsavgift eller hyra är

    viktigast för de sökande. Vidare bör det finnas en balkong men att den är

    inglasad är oviktigt. Att sätta in ett badkar är inte heller något som lockar de

    bostadssökande.

  • 132.
    Svedin, Ludvig
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Klasér, William
    Dalarna University, School of Technology and Business Studies, Construction.
    Analys av en byggnads klimatskal utifrån Miljöbyggnad 3.0: Anpassning av klimatskal utifrån betygsnivåer i Miljöbyggnad 3.0 med fokus på energiindikatorer samt dagsljus2020Independent thesis Basic level (degree of Bachelor of Fine Arts), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Since 1991 when the first goals for environmental politics was established in Sweden, the way of building adapted to the stricter environmental goals. Today many clients choose to certify their buildings with some of the many certification systems, which purpose is to reward buildings that has been built with a high environmental focus.

    The certification system that has been reviewed in this study is Miljöbyggnad 3.0, and the indicators that has been considered is the ones that primarily affects the buildings climate shell. The purpose has been to analyze how the configuration of the climate shell affects the energy- and noise indicators of Miljöbyggnad 3.0, and also analyze which configuration of walls and windows that will give the intended level for each indicator.

    Energy usage and heating-needs were analyzed with only the climate shells U-value considered. The results were then analyzed by a comparison of the differences in energy- and effect usage over a year with the different U-values. The solar gain, one of the indicators which were analyzed was calculated with the calculation methods that are recommended by Miljöbyggnad 3.0. These calculations gave the maximal glass areas depending on the intended level of the indicator called solar gain in Miljöbyggnad 3.0. These glass areas made it possible to make daylight simulations for the fictitious building that were used in this case. The analysis for the indicator noise were made for just one of the four acoustic parameters that are mentioned in BBR, i.e. sound reduction of outdoor noise, since this is the only parameter that affects the configuration of the climate shell.

    The results show that the energy usage can be decreased by 12% when comparing the “worst” and the “best” wall. Although this measure doesn’t improve the total level for the indicator energy usage, it is a good way to decrease the total energy usage of a building. The power-toheat follows the same trend as the energy usage, in there needing to be more measures than the proposed ones to see a change big enough to lower the level for the indicator. Solar gain and daylight are two indicators that together show an ambivalent effect towards eachother, due to the indicator solar gain being negatively effected by large windows, which in turn give a positive outcome on the latter indicator. What this report could show evidence of is that it is not possible to increase both indicators levels without sunscreening of some sort. The best climateshell configuration shown by the study is that which focuses on window with low Uvalues, together with clear window panes and sunscreens by way of blinds or dynamic sunscreening. Improving the walls in way of using more or better insulation does not match the windows price-to-gain when similar value of energy-reduction. In light of this discovery the recommendation is to prioritize window improvements rather than ‘better’ walls.

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  • 133.
    Svensk, Emil
    Dalarna University, School of Technology and Business Studies, Construction.
    Spårdjup i asfaltsbeläggningar2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In Sweden today, there is a state road network that is financed and maintained by the Swedish authorities through the Swedish Transport Administration. At the Swedish Transport Administration maintenance department, maintenance measures are planned and implemented to ensure that the standards of the roads meet the decision requirements that exist. One of the dimension factors for maintenance of asphalt roads is rut depth, the groove depth must not exceed the specific maintenance standard that exists because, if this happens, the accident risk increases One of the purposes of this thesis is to investigate whether it is possible to predict where and why asphalt pavements do not meet the maintenance standard that exists. The result which appeared to be in agreement with the basic attitude before the work was started, that it is possible to see an indication after a few years where the occupancy will exceed the maintenance standard But to predict if and where the asphalt coating will deteriorate first and most is more difficult at an early stage The work's conclusions have contributed to several ideas for further work being proposed, which makes the work to be considered successful

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  • 134.
    Svensson, Andreas
    Dalarna University, School of Technology and Business Studies, Construction.
    Prefab kontra platsbyggd stomme: En fallstudie ur ett kostnadsperspektiv2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report consists a comparative analysis between a prefabricated and place-built body for which selection is the most advantageous in hall buildings, office buildings and store buildings. Investigations of the advantages and disadvantages of building methods from a perspective that have costs, environmental and external factors have been affected. However, in the pursuit of more efficient production and industrial construction, the proportion of prefabricated components for the Swedish building industry does not increase at the rate that the market wants. This necessitates an investigation of what makes the use of prefabricated bodies stagnant. Therefore, does the report examines the pros and cons of the two cases. In constructions of prefabricated concrete elements, connections that do not exist in corresponding place-built constructions are created, which affects the choice. Building and assembling with prefabricated elements increases the quality of the material as they are not exposed to cold or moisture before assembly when the manufacturing is done at the factory. The house is being built faster because the construction site becomes almost a mounting site of parts that are finished, which means that the material storage in the workplace disappears when the elements are delivered when they are assembled. If delivery times are kept

    short, the construction time will also decrease which will result in lower costs. The purpose of the report is to make the choice between these two depending on the type of project easier and it should be achieved with increased knowledge of place-built body and prefabricated body. What has been used as the basis for the report has been produced through a survey and literature study. There have also been interviews on leadership roles in the construction industry. The result shows that the design of the building affects but is not the single deciding factor for the choice between prefabricated or place-built body. If you look primarily at Sweden, the economic factor is usually the basis for the choice of body. The big difference between the stomach alternatives lies in the construction time, which can be up to 1/5 shorter in prefabricated stems than at the place -built frame.

  • 135.
    Svensson, Tony
    et al.
    Dalarna University, School of Technology and Business Studies, Construction. SWECO; KTH.
    Ranhagen, Ulf
    SWECO; KTH; Luleå tekniska universitet.
    Klimatsmarta fysiska strukturer: Sammanställning av kunskapsläget2016Report (Other academic)
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  • 136.
    Swing Gustafsson, Moa
    et al.
    Dalarna University, School of Technology and Business Studies, Energy Technology. Mälardalen University.
    Gustafsson, Marcus
    Dalarna University, School of Technology and Business Studies, Energy Technology. KTH.
    Myhren, Jonn Are
    Dalarna University, School of Technology and Business Studies, Construction.
    Dotzauer, Erik
    Mälardalen University.
    Primary energy use in buildings in a Swedish perspective2016In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 130, p. 202-209Article in journal (Refereed)
    Abstract [en]

    The building sector accounts for a large part of the energy use in Europe and is a sector where the energy efficiency needs to improve in order to reach the EU energy and climate goals. The energy efficiency goal is set in terms of primary energy even though there are different opinions on how to calculate primary energy. When determining the primary energy use in a building several assumptions are made regarding allocation and the value of different energy sources. In order to analyze the difference in primary energy when different methods are used, this study use 16 combinations of different assumptions to calculate the primary energy use for three simulated heating and ventilations systems in a building. The system with the lowest primary energy use differs depending on the method used. Comparing a system with district heating and mechanical exhaust ventilation with a system with district heating, mechanical exhaust ventilation and exhaust air heat pump, the former has a 40% higher primary energy use in one scenario while the other has a 320% higher in another scenario. This illustrates the difficulty in determining which system makes the largest contribution to fulfilling the EU energy and climate goals.

  • 137.
    Swing Gustafsson, Moa
    et al.
    Dalarna University, School of Technology and Business Studies, Energy Technology. Mälardalen University.
    Myhren, Jonn Are
    Dalarna University, School of Technology and Business Studies, Construction.
    Dotzauer, Erik
    Mälardalen University.
    Assessment of the potential for district heating to lower the peak electricity consumption in a medium size municipality in SwedenManuscript (preprint) (Other academic)
    Abstract [en]

    Sweden faces several challenges when more intermittent renewable power is integrated into the energy system. One of the challenges is to have enough electrical power available in periods with low production from intermittent sources. A solution to the problem could be to reduce the electricity peak demand and at the same time produce more electricity during peak hours. One way of doing this is to convert electricity based heating in buildings to district heating (DH) based on combined heat and power (CHP).

    The study analyzes how much a medium sized Swedish municipality can contribute to lower the electricity peak demand. This is done by quantifying the potential to reduce the peak demand for six different scenarios of the future heat market volume and heat market shares regarding electricity based heating and DH in 2050.

    The main finding is that electricity consumption will be reduced by 35-70 % during the peak hour (and 20-40 % on a yearly basis) for all the six scenarios studied compared with the current situation. If the aim is to lower the electricity peak demand in the future, the choice of heating system is more important than reducing the heat demand itself. For the scenario with a large share of DH, it is possible to cover the electricity peak demand in the municipality by using CHP.

  • 138.
    Swing Gustafsson, Moa
    et al.
    Dalarna University, School of Technology and Business Studies, Energy Technology. Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Myhren, Jonn Are
    Dalarna University, School of Technology and Business Studies, Construction.
    Dotzauer, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Life cycle cost of heat supply to areas with detached houses: a comparison of district heating and heat pumps from an energy system perspective2018In: Energies, E-ISSN 1996-1073, Vol. 11, no 12, article id 3266Article in journal (Refereed)
    Abstract [en]

    There are different views on whether district heating (DH) or heat pumps (HPs) is or are the best heating solution in order to reach a 100% renewable energy system. This article investigates the economic perspective, by calculating and comparing the energy system life cycle cost (LCC) for the two solutions in areas with detached houses. The LCC is calculated using Monte Carlo simulation, where all input data is varied according to predefined probability distributions. In addition to the parameter variations, 16 different scenarios are evaluated regarding the main fuel for the DH, the percentage of combined heat and power (CHP), the DH temperature level, and the type of electrical backup power. Although HP is the case with the lowest LCC for most of the scenarios, there are alternatives for each scenario in which either HP or DH has the lowest LCC. In alternative scenarios with additional electricity transmission costs, and a marginal cost perspective regarding the CHP investment, DH has the lowest LCC overall, taking into account all scenarios. The study concludes that the decision based on energy system economy on whether DH should expand into areas with detached houses must take local conditions into consideration.

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  • 139.
    Swing Gustafsson, Moa
    et al.
    Dalarna University, School of Technology and Business Studies, Energy Technology. Mälardalen University.
    Myhren, Jonn Are
    Dalarna University, School of Technology and Business Studies, Construction.
    Dotzauer, Erik
    Mälardalen University.
    Mapping of heat and electricity consumption in a medium size municipality in Sweden2017In: Energy Procedia, ISSN 1876-6102, Vol. 105, p. 1434-1439Article in journal (Refereed)
    Abstract [en]

    The Nordic electricity system faces many challenges with an increased share of intermittent power from renewable sources. One such challenge is to have enough capacity installed to cover the peak demands. In Sweden these peaks appear during the winter since a lot of electricity is used for heating. In this paper a mapping of the heat and electricity consumption in a medium size municipality in Sweden is presented. The paper analyze the potential for a larger market share of district heating (DH) and how it can affect the electrical power balance in the case study. The current heat market (HM) and electricity consumption is presented and divided into different user categories. Heating in detached houses not connected to DH covers 25 % of the HM, and 30 % of the electricity consumption during the peak hours. Converting the detached houses not connected to DH in densely populated areas to DH could reduce the annual electricity consumption by 10 %, and the electricity consumption during the peak hours by 20 %.

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  • 140.
    Swing Gustafsson, Moa
    et al.
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Myhren, Jonn Are
    Dalarna University, School of Technology and Business Studies, Construction.
    Dotzauer, Erik
    Potential for district heating to lower peak electricity demand in a medium-size municipality in Sweden2018In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 186, p. 1-9Article in journal (Refereed)
    Abstract [en]

    Sweden faces several challenges with more intermittent power in the energy system. One challenge is to have enough power available in periods with low intermittent production. A solution could be to reduce peak demand and at the same time produce more electricity during these hours. One way of doing this is to convert electricity-based heating in buildings to district heating based on combined heat and power. The study analyzes how much a Swedish municipality can contribute to lowering peak electricity demand. This is done by quantifying the potential to reduce the peak demand for six different scenarios of the future heat demand and heat market shares regarding two different energy carriers: electricity-based heating and district heating. The main finding is that there is a huge potential to decrease peak power demand by the choice of energy carrier for the buildings’ heating system. In order to lower electricity peak demand in the future, the choice of heating system is more important than reducing the heat demand itself. For the scenario with a large share of district heating, it is possible to cover the electricity peak demand in the municipality by using combined heat and power.

  • 141.
    Swing Gustafsson, Moa
    et al.
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Myhren, Jonn Are
    Dalarna University, School of Technology and Business Studies, Construction.
    Dotzauer, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Primary energy reduction in buildings: Case study on a residential building in Falun, Sweden2014In: Proceedings from the 14th International Symposium on District Heating and Cooling / [ed] Anna LAND, Swedish District Heating Association, 2014, p. 543-545Conference paper (Refereed)
    Abstract [en]

    Since a large share of the total European primary energy is consumed in the building sector, buildings have to become more energy efficient in order to reach the goals of the European energy efficiency directive. In Sweden, focus has been on lowering final energy consumption, not primary energy consumption. A relevant question today is whether a general understanding of the primary energy concept is needed to encourage selection of better energy efficiency measures from an environmental perspective. There are however uncertainties of how to calculate primary energy consumption since different primary energy factors (PEF) are used by different actors, especially for district heating (DH) and electricity (EL.).

    In this study total primary energy consumption was calculated for a residential building before and after several renovation measures were made. The major change after the renovation was that a large share of the DH was substituted by heat from an exhaust air heat pump and solar collectors. A range of commonly used PEFs were assessed.

    The evaluation showed that the energy efficiency measures reduced the total primary energy consumption for most combinations of PEFs. The most essential was how the DH was valued. A low PEF for DH in combination with most of the PEFs for electricity could even result in higher total primary energy consumption after the renovation.  

  • 142.
    Swing Gustafsson, Moa
    et al.
    Dalarna University, School of Technology and Business Studies, Energy Technology. Mälardalens högskola.
    Myhren, Jonn Are
    Dalarna University, School of Technology and Business Studies, Construction.
    Dotzauer, Erik
    Gustafsson, Marcus
    Life cycle cost of building energy renovation measures, considering future energy production scenarios2019In: Energies, E-ISSN 1996-1073, Vol. 12, no 14, article id 2719Article in journal (Refereed)
    Abstract [en]

    A common way of calculating the life cycle cost (LCC) of building renovation measures is to approach it from the building side, where the energy system is considered by calculating the savings in the form of less bought energy. In this study a wider perspective is introduced. The LCC for three different energy renovation measures, mechanical ventilation with heat recovery and two different heat pump systems, are compared to a reference case, a building connected to the district heating system. The energy system supplying the building is assumed to be 100% renewable, where eight different future scenarios are considered. The LCC is calculated as the total cost for the renovation measures and the energy systems. All renovation measures result in a lower district heating demand, at the expense of an increased electricity demand. All renovation measures also result in an increased LCC, compared to the reference building. When aiming for a transformation towards a 100% renewable system in the future, this study shows the importance of having a system perspective, and also taking possible future production scenarios into consideration when evaluating building renovation measures that are carried out today, but will last for several years, in which the energy production system, hopefully, will change.

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  • 143.
    Thorsberg, Henrik
    Dalarna University, School of Technology and Business Studies, Construction.
    Dimensioneringsmall för träförband med träskruv2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Boverkets design rules, BKR, containing regulations and general advice on constructions ended in 2011. They were replaced by Eurocodes (EK), the new regulations for dimensioning constructions. Eurocode was introduced because it provides better quality in the Swedish construction market and will lead to fewer misunderstandings. The previous regulations, BKR, were not as complicated in the calculation process as compared to the European Standard, Eurocode 5. The calculation process with EK5 has become a longer process and is more time consuming. In order for a construction to function as a system, it is important that the structural parts are joined together well. It does in so called nodes, where connections transmit the working forces of the structure. The purpose of the thesis work is to make a calculation template in Microsoft Excel to Ramböll AB. This is to simplification process for the calculation of Eurocod 5 with wood screw connections. A dimensioning of the template will be performed on two types connection with woodscrew, where output and time will be compared to hand calculation, the method most commonly used by Ramböll. The work will be based on interviews and literature studies from books and reports in connection with wood screws. This is done to gain a better understanding of the subject area. A case study will then be performed between calculation methods hand calculation and dimensioning template. A dimensioning template has been developed in Microsoft Excel according to Rambölls needs. Dimensioning with the template and hand calculation has been carried out and compared to find out the time and dimensions of bearing capacity with both methods. The conclusion of this project is that a dimensioning template is possible to design in Excel. It also shortens the timeframe in the design process considerably due to the fast input you can make in the template.

  • 144.
    Ulvenvall, Maria
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Andersson, Lovis
    Dalarna University, School of Technology and Business Studies, Construction.
    Livscykelanalys av material i stommen på ett småhus: Fallstudie av en vanligt förekommande väggoch takkonstruktion i ett småhus2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report contains a life-cycle analysis of the materials in the body-construction of a house. The purpose of the report is to perform a LCA at a detached house in commonly used design, to be able to see what house suppliers can do to reduce the building’s environmental impact in the form of carbon dioxide equivalents and primary energy in the production phase of the house production. The report contains a descriptive part which includes a presentation of the properties and the manufacturing process of the individual materials. A review of the material in the wall construction and in the ceiling construction for an existing projected house from the house manufacturer Bra Hus is presented.

    In this work, a retrospective case study is carried out on the body of the house. The program One Click LCA is used to obtain a clear LCA.

    The result is presented in the form of the total environmental impact of the building design with today’s choice of materials with regard to energy use and carbon dioxide emissions. Further down in the report some alternative materials choices are presented for the design and also how these changes produce effects in comparison with the original design’s energy use and carbon dioxide emissions. The result presented by this study is that the total CO2e emission for the exterior walls and ceilings of the construction is 6.07 tons and the primary energy use of 193.15 GJ. By using more local manufactures, changes to cellulose insulation and improvement gypsum, the environmental impact can be reduced by 18% CO2e and 28% primary energy use per building.

    The conclusion is:

    ● The design has the potential to be improved from an environmental point of view, both by changing the supplier but also by taking major measures, such as changing the design by changing materials. Using the alternative material (see section 2.4) as presenters in the report, environmental impact can be reduced by 18% CO2e and 28% primary energy use per building, in relation to the usual wall and ceiling construction.

    ● Cellulose insulation is a better alternative than mineral wool insulation for the purpose of environmental impact with 34,9% CO2e in the wall and 15,5% CO2e in the ceiling per m3 .

    ● By reducing transport distances, environmental impact can be reduced by 38,6%.

    ● The U-value of the studied structural components can be maintained at the same time as they are environmentally efficient. The U-value of the outer wall can be maintained with the same design thickness as before, equal to the outer roof. The U-value of the ceiling is retained while the insulation material can be reduced by 5 cm

  • 145.
    Viberg, Mikael
    Dalarna University, School of Technology and Business Studies, Construction.
    Tilluftsradiatorns effektivitet: En jämförande studie av tre tilluftsintegrerade rumsvärmare och en konventionell radiator2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Radiators are one of the most common and proven systems for space heating. Their limited heat-emitting surface, however, has limited the temperatures the systems work for. New solutions improve efficiency opening up systems for heating by using energy of lower grades and temperatures. By bringing outside air directly through the radiator, heat transfer can be improved. The purpose of the study is to examine how the outdoor temperature 0 ° C and -15 ° C, and the constructive details, affects the effectiveness of six different solutions for space heating. The study included four test objects of which one is a new type of a so-called ventilation radiator. The other test objects were a more conventional panel radiator and two existing heating’s – and were supply air terminals. Other aims were to investigate how three different types of bottom plates of the prototype affect the efficiency and suggest solutions for the ventilation radiator. The tests were conducted in a climate chamber in which actual conditions could be created and the efficiency of the respective solution were studied. An aggregate and a water circuit supplied heat to the test objects while a pressure creating fan created enough airflow. The results show that the degree of outdoor air mixed up with room air plays a major role in the effectiveness of the ventilation radiator. If the room air mix is limited the prototype can improve their efficiency by 15 to 18%. Even the outdoor temperature plays a big role in efficiency. The prototype increases its efficiency by 19 to 26%, while the radiators with supply air increased its efficiency by 10 to 15% when the outside temperature was changed from 0 ° C to -15 ° C. The two supply air terminals are equivalent in effectiveness, one raises, however, its effectiveness somewhat more when the outdoor temperature is lowered. All solutions where the outside air was passed through the radiators are more effective than the more conventional radiator, where the outdoor air never come in direct contact with the radiator. The study shows that it is important that the outside air that comes in contact with the radiator has been preheated as little as possible for good efficiency.

  • 146.
    Vikner, Joel
    Dalarna University, School of Technology and Business Studies, Construction.
    Projektledares upplevelser av startskedet ibyggprojekt: Specifikt i relation till kommunikation och samarbete2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Tidiga skeden är avgörande för huruvida ett byggprojekt blir framgångsrikt eller inte. Brister i kommunikation och samverkan har flaggats som några av de problem som förekommer inom branschen och forskningen slår fast att förhållningsregler för dessa två faktorer bör fastställas i ett tidigt skede. Trots att tidiga skeden har stor inverkan på byggprocessen är denna i mindre omfattning utforskad än senare skeden. Denna forskningslucka motiverar att undersöka även detidiga skedena. Syftet med denna studie är att undersöka projektledares upplevelser av startskedet i byggprojekt och specifikt avseende kommunikation och samarbete och även fastställa vilka metoder för möten och riskanalyser i tidigt skede som kan leda till ökad måluppfyllnad. Vidare har användametoder för samarbete och kommunikationer observerats och analyserats. Studien genomfördes på en mindre projektledningsfirma i Mellansverige där fem projektledare intervjuades enligt semistruktureradmodell. Resultatet visar att den befintliga forskning och litteratur om tidiga skeden som finns stämmer överens med den bild som speglas av intervjuerna. Projektledarna anser att brist på tid i tidiga skeden är en vanlig orsak till fel tillsammans med frånvaron av mål alternativt otydligt formulerade mål. Användandet av en kommunikatör eller facilitator ansågs kunna ha positiv inverkan på projekt men används i dagsläget sparsamt och lokalisering av intressenter i byggprojektses som en stor utmaning i stora organisationer. Vidare upplevs det föreligga frustration över svårigheten att ordentligt fastställa behovet och lokalisera alla som kan tänkas påverkas av intressenter i byggprojektet. Studien har gett en fördjupad bild av några projektledares syn på tidiga skeden. Slutsatsen av studien visar på vikten av att arbeta mer omfattande med de tidiga skeden, i synnerhet med mål, för att byggprojektet skall bli mer framgångsrikt och effektivt samt och även minimera felaktigheter. Kommunikation och samarbete spelar en viktig roll i detta arbete och i förlängningen på slutprodukten.

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  • 147.
    Wahlström, Simon
    Dalarna University, School of Technology and Business Studies, Construction.
    Tillämpning av CoClass i teknisk förvaltning: Kartläggning av klassifikationssystemet CoClass i teknisk förvaltning2020Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Digital informationsmodellering i anläggningsarbeten och byggnader har blivit allt vanligare i byggbranschen. Detta till följd av branschens teknikutveckling, nya standarder och behov av att se byggnadsobjekten i ett livscykelperspektiv. Det har resulterat i att allt större krav ställs på att kunna samordna och klassificera informationen under hela bygg- och förvaltningsprocessen. Syftet med denna studie är att undersöka den potentiella nyttan av att använda CoClass i ett förvaltningsskede och vad som krävs för att underlätta implementering av CoClass för fastighetsförvaltare. Studiens design har utformats som en fallstudie för att uppnå studiens syfte. Som datainsamlingsmetod har semistrukturerade intervjuer gjorts där fem personer som arbetar med systemförvaltning intervjuats. Det erhållna resultatet visar att systemleverantörer av fastighetssystem är redo att tillämpa CoClass men att det saknas kunskap och kompetens vilket medför att det är svårt för förvaltare att kravställa CoClass. Studien har bidragit till djupare förståelse för hur det nya klassifikationssystemet CoClass är uppbyggt och hur det är tänkt att tillämpas. Studien har också visat att CoClass har potentialen att vara det framtida klassifikationssystemet för all bebyggd miljö i Sverige men det krävs att branschen är eniga och har kunskapen som krävs för att nyttja det.

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  • 148.
    Wennström, Elisabet
    Dalarna University, School of Technology and Business Studies, Construction.
    Flexibelt småhus: Framtagande av typhus åt Dalahus2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Byggbranschen står inför en stor utmaning för att bidra till en mer hållbar utveckling för att minska klimatpåverkan. I detta arbete undersöks möjligheten att bygga flexibla småhus som ett led i att bidra till minskad energiåtgång genom att maximera småhusens användning och bygga dem så energisnålt som möjligt, med miljövänliga material. Att redan i projekteringsfasen planera för småhusets framtid och ge det chansen att kunna byggas om efter människors ändrade behov, gör att huset kan användas längre utan att rivas eller stå tomt. Projektet mynnar ut i ett förslag på typhus åt småhusföretaget Dalahus som efterfrågar ett just ett flexibelt småhus. Huset är planerat för att kunna byggas ut i framtiden om det finns behov av ett större hus. Detta typhus kan användas som inspiration åt företagets kunder när de ska välja vilken typ av hus de ska bygga.

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  • 149.
    Wik, Tina
    Dalarna University, School of Technology and Business Studies, Construction.
    Sustainability and research integrated in engineering courses at Dalarna University, Sweden2015Student paper otherStudent thesis
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  • 150.
    Zhang, Xingxing
    et al.
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Pellegrino, Filippo
    Shen, Jingchun
    Dalarna University, School of Technology and Business Studies, Construction.
    Copertaro, Benedetta
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Huang, Pei
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Saini, Puneet
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    Lovati, Marco
    Dalarna University, School of Technology and Business Studies, Energy Technology.
    A preliminary simulation study about the impact of COVID-19 crisis on energy demand of a building mix at a district in Sweden2020In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 280, article id 115954Article in journal (Refereed)
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