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  • 101.
    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.

  • 102.
    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

  • 103.
    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.

     

  • 104.
    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.

  • 105.
    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.

  • 106.
    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.

  • 107.
    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.

  • 108.
    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.

  • 109.
    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.

  • 110.
    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

  • 111.
    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.

  • 112.
    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.

  • 113.
    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.

  • 114.
    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, ISSN 1996-1073, 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.

  • 115.
    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, E-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 %.

  • 116.
    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.

  • 117.
    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.  

  • 118.
    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.

  • 119.
    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.

  • 120.
    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.

  • 121.
    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
  • 122.
    Åkerman, Hampus
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Larsson, Eric
    Dalarna University, School of Technology and Business Studies, Construction.
    Lipton - Det smarta trähuset: Energieffektivisering av Dalahus lägenhetskomplex i trä2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The Earth's climate is affecting all countries and Sweden is no exception. With agrowing global environmental problem everyone needs to contribute to change.The project's contribution to the environment is to show how energyconsumption of a multi-family apartment block can be reduced. By calculatingUm for the house Lipton's current building envelope and identify the parts whereimprovements could be made, and compile the elements of design which aremost promising for improving the building envelope. Technical measures witch isnot directly related to the building envelope, such as demand controlledventilation, electrically efficient fans and other energy-smart solutions will beutilized to reduce Lipton specific energy consumption.Buildings lose heat through the building envelope but by harnessing the sun'senergy, think carefully about the building's placement, increase insulationthickness and use smart ventilation solutions, the project aims to reduce thehouse Liptons specific energy consumption to at least half of Boverkets energydemands in 2014 for new buildings in climate zone 2 which is set to110 kWh/m2 year.To calculate the specific energy consumption in use phase, a simple calculationprogram, TMF-Energy 2.3, will be used. In the project, the heating system,water/sewer and use of household energy is not to be included.The original design of the house Lipton has a specific energy consumption of56.9 kWh/m2 year which is relatively low and almost half of Boverkets energyrequirementsThe energy consumption of Lipton will be decreased by:• Improving Um for Lipton's building envelope.• Using a double-shell technology.Högskolan Dalarna• Plan where the house is located for favorable outer conditions• Using demand-controlled ventilation with energy efficient fans

  • 123.
    Åkerström, Johan
    et al.
    Dalarna University, School of Technology and Business Studies, Construction.
    Blomqvist, Andreas
    Dalarna University, School of Technology and Business Studies, Construction.
    Tillbyggnad av miljonprogramsvilla: Olika tillbyggnader anpassade för miljonprogramsvillor2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Many villas built under the "miljonprogram" is in need of extension due to being too narrow in addition of being worn out. For this reason, many families chose to move out of these villas in favor of buying a bigger and more modern house. This means that the "miljonprogram" villas are in need of refurbishment to not lose too much value and popularity. Refurbishment of these villas can be done in many ways. One being a extension of the house, changing the truss or just a flat overall refurbishment. The method varies depending on the build of the house, as most if not all houses are constucted in different ways. A purpose of this report is to present a variety of how these villas can be rebuilt in favor of higher standards and a bigger living area. Various proposals will be presented where each development is made in different ways. Another purpose of the report is to compile the material costs for the various additions.

    This is done in order to gain an economic perception of the various additions and which add-on option is most economically sustainable

    The test object used in the report is stationed in Falun. The building is a typical miljonprograms villa with a pitched roof. The façade material for the villa consists of non-bearing façade pointers. The various additions to the project are based on the test object's original drawings. The new blueprints for the villa is drawn in the architectureprogram Revit.

    In the results section, various supplementary proposals are presented and finally an economic comparison is made.

    This is made to get an economic view of the various additions proposed in this report. Where the prices are compared in SEK per square meter.

    The discussion section discusses, among other things, the various additions suggested earlier.

    How the surfaces of the test object are trying to be preserved and the though process behind the new additions.

    Finally, economic aspects are discussed in the results part of the report. Four different conclusions are included in the report.

    One conclusion is that a mansard chair creates many new surfaces upstairs, and that it is also economically advantageous from a material cost perspective.

  • 124.
    Öhrèn, Rasmus
    Dalarna University, School of Technology and Business Studies, Construction.
    Tekniskt samråd: Studie av likvärdighet i utförandet2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A new planning- and building act was applied the 2nd may 2011. The intention was to simplify the planning- and building process as the control of constructing where tightened. In the new act there has been introduced a deadline for the building permits of ten weeks. To be allowed to begin the constructing you will need a starting clearance. The clearance is preceded by a technical consultation.

    The purpose of this study was to survey if the technical consultation is performed equivalent between different municipalities in the county of Dalarna. Other purposes was:

     To create a basis for improvement regarding the technical consultation.

     Examine how to facilitate or improve the consultation.

     Illustrate why the technical consultation is so important in the building process.

     Clarify the differences in the new and the old act regarding the consultation.

    To understand what a technical consultation is and how it should be performed the work began with a literature study. A literature study was also performed to pick a method for the work. These studies resulted in a method based on the semi-structured interview form. A number of interviews were conducted in five building committees in Dalarnas County. To study the technical consultation in practice a visit during a consultation were conducted at Mora – Orsa and Falun municipalities.

    This thesis was delimited to examining how technical consultation is performed and works in various building committees in Dalarnas county. The work was delimited to only process opinions from building inspectors and a control manager.

    The results have been compiled and are reported in the results chapter. All respondents in this thesis have the opinion that complete documentation is essential to carry out a technical consultation. The developer should be well-informed and familiar with the project and an experienced developer could simplify the building process. A technical consultation is of great importance to ensure that the society’s conditions upholds. It is particularly important to hold a consultation when the developer is inexperienced.

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