Dalarna University's logo and link to the university's website

du.sePublikasjoner
Endre søk
Begrens søket
1 - 39 of 39
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • chicago-author-date
  • chicago-note-bibliography
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Treff pr side
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
Merk
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 1.
    Afzali, Faizullah
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Rashid, Renas
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Främjande av återbruk av byggmaterial: En kvalitativ studie om branschens uppfattningar kring potentialen hos ekonomiska incitament2023Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Denna uppsats lyfter fram betydelsen av ekonomiska incitament för att stimulera återanvändning av byggmaterial i Sverige. Trots att byggindustrin ser fördelarna med återanvändning, visar studien att det saknas tillräckliga ekonomiska incitament för att göra det till en standardpraxis. Genom semistrukturerade intervjuer med representanter från byggindustrin och litteraturstudie, identifierade studien flera hinder som kvalitetsgaranti, byggregler, brist på kunskap och ekonomiska utmaningar. Studiens syfte var att undersöka vilka ekonomiska incitament som kunde främja användningen av återanvända byggmaterial och identifiera potentiella hinder för deras implementering. Resultaten tyder på att det för närvarande saknas direkta ekonomiska incitament som uppmuntrar byggföretag till att återanvända byggmaterial. Flera hinder har identifierats, bland annat utmaningar rörande kvalitetsgarantier, byggregler, brist på kunskap och ekonomiska svårigheter. Studien framhåller också att det krävs mer omfattande politiska och ekonomiska initiativ för att stimulera användningen av återanvända byggmaterial. Uppsatsen bidrar till den befintliga forskningen genom att ge rekommendationer till beslutsfattare och andra aktörer inom byggsektorn som är intresserade av att främja hållbarhet och miljövänliga metoder. Den föreslår att framtida forskning bör inriktas på att utforma och testa specifika ekonomiska incitament för att främja återanvändning av byggmaterial. Av studien framkommer det att byggföretag identifierar en mängd hinder och utmaningar vid återanvändning av byggmaterial. Det framkommer även att det finns en märkbar brist på ekonomiska incitament från staten för att främja användandet av återanvända byggmaterial i byggprojekt. Byggföretagen föreslog olika former av ekonomiska incitament som skulle kunna främja användningen av återanvända byggmaterial, inklusive bidrag, skattelättnader och digitala plattformar. Det fanns även en variation i politiska åsikter gällande idén om att införa ekonomiska incitament för att främja återanvändningen av byggmaterial, med en del som stödde idén och andra som motsatte sig den.

    Fulltekst (pdf)
    fulltext
  • 2.
    Andersson, Mikael
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Barrioz, Gabriel
    Borlänge kommun.
    Nordström, Louise
    Borlänge kommun.
    Ranhagen, Ulf
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Svensson, Tony
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Rönnelid, Mats
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Energiinnovation Jakobsdalen: Workshopserie hösten 20212022Rapport (Annet vitenskapelig)
    Fulltekst (pdf)
    fulltext
  • 3.
    Berghauser Pont, Meta
    et al.
    Chalmers tekniska högskola.
    Hannula, Nina
    Göteborgsregionen.
    Isemo, Sanna
    Urban Futures.
    Ranhagen, Ulf
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Förtätning av stationsnära områden för god tillgänglighet: Utveckling av en analys- och utvärderingsmetod2022Rapport (Fagfellevurdert)
    Fulltekst (pdf)
    fulltext
  • 4. Copertaro, Benedetta
    et al.
    Shen, Jingchun
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Sangelantoni, Lorenzo
    Zhang, Xingxing
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Building Renovation Adapting to Future Climate: A Potential Solution of Phase-Change Material to Building Envelope2022Inngår i: Handbook of Climate Change Mitigation and Adaptation / [ed] Maximilian Lackner, Baharak Sajjadi, Wei-Yin Chen, Springer Nature, 2022Kapittel i bok, del av antologi (Fagfellevurdert)
  • 5.
    Domert, Adam
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Nordqvist, Jesper
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Platschefers upplevelser av kommunikationsmetoder på byggarbetsplatsen: En intervjustudie om platschefers med BAS-U ansvars upplevelser av de kommunikationsmetoder som används på geografiskt stora byggarbetsplatser.2022Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    The construction industry is a very accident-prone industry where communication plays a crucial role in achieving the Swedish Work Environment Authority's vision that no one should become ill, injured, or die from work. The aim of the study is to investigate the effects of the methods used by site managers to communicate on geographically large construction sites. Which ones are used and what are their experiences? The study also aims to investigate if there are risks in the work environment linked to the methods used to communicate. The report is limited to construction sites with a spread of at least five kilometers and the survey sample to site- and project managers. Based on the aim, four questions were formulated that are studied and answered in the results. The method used in this study is a qualitative interview study where the questions were semi-structured, and the selection was non-probability based. Literature studies were also used to review the existing research situation and to give the reader a deeper understanding of the topic. The site managers experiences off the communication methods were discussed during the interviews. The communication methods mentioned can be categorized as oral, written, and visual. Oral methods are mainly used when it is important to get a quick response. Written when many are to be given the same information and visual methods when information, both oral and written, needs to be clarified. Oral methods have the advantage that they are quick and easy to handle. However, a disadvantage of oral communication is that it is often not documented. The biggest advantage of written methods is precisely that the information is documented. A disadvantage, however, is that it is difficult to see whether the message has been received or been misinterpreted. All respondents described problems in their work with communication. Two of the suggestions that were raised for development of the methods were to gather several digital communication tools in one place and to make chatgroups more adapted for the construction industry. Work environment risks were described in the form of difficulty in reaching the construction workers with important information. Work environment risks have also been described by site managers as stress and uncertainty when issues of responsibility is unknown or whether the information has been received.

  • 6.
    Frej, Joakim
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Mathisen, Lovisa
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Återbruk av platsgjuten betong: Återbrukade betongbjälklag som väggelement för hållbara och resurseffektiva byggnader2024Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    Abstract [en]

    In order for the construction industry to be able to gear up in its work towards becoming climate neutral and reduce the amount of construction waste, a change must take place in the way we build today. In recent years, recycling has become a talked-about topic and a solution that could speed up the industry's transition to becoming more sustainable. However, using recycled building materials in new productions requires new ways of planning and constructing buildings. In this thesis, the reuse potential of a cast-in-place concrete floor from the 1960s has been investigated, with a focus on how these can be structurally reused as wall elements in combination with a flat floor structure made of cross-laminated timber panels [CLT]. This has been done by modeling a five-storey apartment building and based on this, calculated which different forces act on the building and thus also what capacity is required in the construction. The research shows that if the concrete is sawn out in storey-high elements that are 3.2 meters wide, these can be combined with a suspended joist in CLT if an angle baris used as support for the joist. However, building with a laid-up joist, which means a CLT joist is placed between two walls, was not possible due to the heaviness of the concrete. To create stability in an apartment building, a mechanical connection can also be made between the concrete walls between the floors to be able to channel horizontal forces down to the foundation. This can be constructed by using two steel plates that are attached at the bottom to the wall elements and at the top to the underlying wall and attach with 8 expanding concrete bolts. The study also shows that there are no differences in the possibility of designing this type of construction between the geographical locations of Luleå, Borlänge and Malmö.

  • 7.
    Garman, Ian
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. Univ Gävle.
    Mattsson, Magnus
    Univ Gävle.
    Myhren, Jonn Are
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Persson, Tomas
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Demand control and constant flow ventilation compared in an exhaust ventilated bedroom in a cold-climate single-family house2023Inngår i: Intelligent Buildings International, ISSN 1750-8975, E-ISSN 1756-6932, Vol. 15, nr 4, s. 175-188Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A convertible, zoned ventilation system was field-tested in a modern, airtight Swedish home when occupied either by an experimental team or by a family. Indoor air quality in the master bedroom was monitored under four ventilation strategies. Relative to constant air volume strategies (CAV), demand-controlled ventilation (DCV) that was responding to CO2 concentration extracted more air when people were present, but less in total over 24 h. This elevated the indoor air humidity, beneficial in climates with dry winter air. Multiple monitors within the bedroom indicated that vertical CO2 stratification occurred routinely, presumably due to low mixing of supply air from a wall-mounted diffuse vent, spreading the air radially over the wall. This seemingly improved air quality in the breathing zone under local (ceiling) extract ventilation but worsened it during more typical, centralised extract ventilation, where air escapes the room via an inner doorway. The local extract arrangement thus seemed to yield both improved ventilation efficiency and reduced contaminant spread to other rooms. The noted air quality variations within the room highlight the importance of sensor placement in demand-control ventilated spaces, even in small rooms such as bedrooms.

    Fulltekst (pdf)
    fulltext
  • 8.
    Garman, Ian
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Mattsson, Magnus
    Persson, Tomas
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Ventilation alone fails to prevent overheating in a Nordic home field study2022Inngår i: 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022, Kuopio, 12 June 2022 through 16 June 2022, International Society of Indoor Air Quality and Climate , 2022Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A field study conducted in a modern Nordic single-family house with high airtightness and insulation levels, attempted to control summer indoor overheating using night-time cooling strategies. Exhaust air flow rates were manually scheduled by the researchers (based on weather forecasts), analogous to what an engaged occupant - or a predictive system - might do. Air temperatures at a nearby meteorological station peaked at 30 °C during 6 days in June that saw only 44 hours below 18 °C. Temperatures recorded indoors at the test house reached 32 °C, due also to very large solar gains, and never fell below 26 °C over 8 continuous days. It appears that under extended heat conditions that are exceptional now, but foreseen to become more frequent, some modern Nordic homes cannot be temperature controlled by ambient ventilation alone. © 2022 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022. All rights reserved.

  • 9.
    Gál, Csilla V
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Urban weather generation: the intercomparison of three emerging models2021Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Cities modify the background climate through the surface-atmosphere interaction. This modification is function of urban design features, such as the configuration of buildings and the amount of vegetation. Compared to the undisturbed climate of the region, the climate of cities is characterized by higher temperature and lower wind speed. This modification is especially pronounce in dense urban areas. The climate modification of cities is not static, but varies in space and time. The spatial variations are governed by land use and built form differences, as well as by the presence or absence of green and blue infrastructures. Due to the spatial complexity of cities and the general lack of urban weather station networks in most places, the amount of available urban weather data is limited. As a consequence, planners, engineers and public health professionals can only approximate the climate impact of built environments in their respective fields.

    Over the past years, several numerical simulation models have emerged that are able to model the influence of built areas on the atmosphere at the local scale and thus, deliver urban weather data for an area of interest. The aim of this study is to assess the performance of three numerical models with an ability to predict site-specific urban air temperature. The evaluated models are the Urban Weather Generator (UWG), the Vertical City Weather Generator (VCWG) and the Surface Urban Energy and Water Balance Scheme (SUEWS). Although the models differ in their scopes, modeling approaches and applications, they all derive the urban weather data from rural observations considering the land use and built form characteristics of the site.

    The models are evaluated against air temperature measurements from the dense, 13th District of Budapest (Hungary). The field measurement utilized simple air temperature and relative humidity loggers placed in non-aspirated solar radiation screens at four shaded sites. The two week measurement period encompassed a five-day-long anticyclonic period with clear sky and low wind speed. Preliminary results indicate a good general agreement between modeled and observed values with root mean square error below or at 2ºC and index of agreement between 0.92-0.96. During the anticyclonic period most models slightly overestimate the daily maximum and underestimated the daily minimum urban air temperature.

    Fulltekst (pdf)
    fulltext
  • 10.
    Han, Mengjie
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Mikrodataanalys.
    Zhao, Jing
    Zhang, Xingxing
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Shen, Jingchun
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Li, Yu
    The reinforcement learning method for occupant behavior in building control: A review2021Inngår i: Energy and Built Environment, ISSN 2666-1233, Vol. 2, nr 2, s. 137-148Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Occupant behavior in buildings has been considered the major source of uncertainty for assessing energy consumption and building performance. Modeling frameworks are usually built to accomplish a certain task, but the stochasticity of the occupant makes it difficult to apply that experience to a similar but distinct environment. For complex and dynamic environments, the development of smart devices and computing power makes intelligent control methods for occupant behaviors more viable. It is expected that they will make a substantial contribution to reducing global energy consumption. Among these control techniques, the reinforcement learning (RL) method seems distinctive and applicable. The success of the reinforcement learning method in many artificial intelligence applications has given an explicit indication of how this method might be used to model and adjust occupant behavior in building control. Fruitful algorithms complement each other and guarantee the quality of the optimization. However, the examination of occupant behavior based on reinforcement learning methodologies is not well established. The way that occupant interacts with the RL agent is still unclear. This study briefly reviews the empirical applications using reinforcement learning, how they have contributed to shaping the modeling paradigms and how they might suggest a future research direction.

    Fulltekst (pdf)
    fulltext
  • 11.
    Huang, Pei
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Lovati, M.
    Shen, Jingchun
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Chai, J.
    Zhang, Xingxing
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Investigation of the Peer-to-Peer energy trading performances in a local community under the future climate change scenario in Sweden2022Inngår i: Energy Reports, E-ISSN 2352-4847, Vol. 8, s. 989-1001Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Peer-to-peer (P2P) energy sharing among neighboring households is a promising solution to mitigating the difficulties of renewable power (such as solar Photovoltaics (PV)) penetration on the power grid. Until now, there is still a lack of study on the impacts of future climate change on the P2P energy trading performances. The future climate change will cause variances in the renewable energy production and further lead to changes in the economic performances of households with various energy uses and affect the decision making in PV ownership and pricing strategies. Being unaware of these impacts could potentially hinder the P2P energy sharing application in practice. To bridge such knowledge gap, this paper conducts a systematic investigation of the climate change impacts on the energy sharing performance in solar PV power shared communities. The future weather data is generated using the Morphine method, and an agent-based modeling method is used for simulating the energy trading behaviors of households. Four comparative scenarios of different PV ownerships and pricing strategies are designed. The detailed energy trading performances (including the PV power self-sufficiency, cost saving, revenues, and compound annual growth rate) for the four comparative scenarios are analyzed under both the present and future climates and compared. The study results of a building community located in Sweden show that the future climate change is more beneficial to large energy use households while less beneficial to small households. High price of energy trading can improve the fairness of the economic performances in the community, especially when some of the households do not have any PV ownership. This study can help understand the future climate impacts on the energy sharing performances of building communities, which can in turn guide decision making in PV ownership and price setting for different households under the future climate change to facilitate real applications. © 2021 The Author(s)

    Fulltekst (pdf)
    fulltext
  • 12.
    Johansson, Martina
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Sjölander Bengtson, Sofie
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Hur byggs permanentbostäder i solitt timmer för att klara BBR:s krav?: En studie om dagens timmerhusbyggande ur ett perspektiv med ständigt striktare krav på energihushållning.2023Independent thesis Basic level (university diploma), 5 poäng / 7,5 hpOppgave
    Abstract [sv]

    Klimatåtgärder är idag ett högaktuellt ämne. Att minska koldioxidutsläppen genom att ställa om till ett mer cirkulärt samhälle med ökat återbruk, bättre utnyttjande av resurser samt minimera gifter är några viktiga aspekter som det läggs stort fokus på. Klimatförändringens konsekvenser är en annan faktor att beakta i dagens byggande av bostäder, då vi behöver rusta oss för mer extremväder. Utifrån dessa aspekter avser denna studie utreda timmerhus med rena timmerstockar både på in- och utsida i väggkonstruktionen. Timmerhustraditionen är en gammal och välbeprövad teknik. Att husen kan stå välbevarade i flera hundra år finns det många exempel på. Gedigna, naturliga material som ger en sund, behaglig, giftfri inomhusmiljö utan farligt avfall är andra fördelar. Men med dagens energihushållningskrav på nybyggnationer får timmerhustillverkarna svårigheter att klara nivån i den konsoliderade versionen från Boverket, - BBR 29. Att kraven på energihushållning ständigt sänks hotar den gamla timmerhustraditionen, vilket gör att timmerhus som permanentbostäder i vissa utformningar inte kan levereras i dess rena form och därmed äventyras helhetsnyttan med husen. Syftet med denna studie är att utreda hur timmerhusföretagen gör och vilka anpassningar som krävs för att klara Boverkets nuvarande krav, samt utreda hur timmerhusen står sig ur ett cirkulärt perspektiv. Genom detta arbete är målsättningen att belysa helhetsnyttan med timmerhusen ur det större perspektivet, men att kravställningen gör det svårt att leverera de rena stommar som är det ultimata ur ett cirkulärt perspektiv. För att få de svar som behövs sammanställs ett resultat som baseras på litteraturstudier, ett studiebesök på ett timmerföretag, semistrukturerade intervjuer med timmerhustillverkare och ett möte med en beräkningskonsult som gjort flertalet beräkningar åt svenska timmerhusföreningen .Det sammanställda resultatet visar att det finns tekniker för att bygga med rena stommar i vissa enklare utföranden som klarar nuvarande kraven, men vill kunden ha ett mer exklusivt utförande behövs det oftast anpassningar i form av exempelvis tilläggsisolering eller andra lösningar för att klara de kravnivån. Detta arbete visar att timmerhusen står sig otroligt väl ur ett helhetsperspektiv där miljö, hälsa och hållbarhet står i centrum, - men indikerar att Boverkets krav inte är helt i linje med de cirkulära målen som återfinns inom Agenda 2030 och de svenska klimatmålen, då det sätts samma kravnivå gällande alla nyproduktioner, oavsett konstruktion eller utförande.

    Fulltekst (pdf)
    fulltext
  • 13.
    Khadra, Alaa
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. University of Gävle.
    Akander, Jan
    University of Gävle.
    Myhren, Jonn Are
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. Building Technology, Dalarna University, 791 88 Falun, Sweden.
    Greenhouse Gas Payback Time of Different HVAC Systems in the Renovation of Nordic District-Heated Multifamily Buildings Considering Future Energy Production Scenarios2024Inngår i: Buildings, E-ISSN 2075-5309, Vol. 14, nr 2, s. 1-17, artikkel-id 413Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The European Union (EU) has implemented several policies to enhance energy efficiency. Among these policies is the objective of achieving energy-efficient renovations in at least 3% of EU buildings annually. The primary aim of this study was to offer a precise environmental comparison among four similar district-heated multifamily buildings that have undergone identical energy efficiency measures. The key distinguishing factor among them lies in the HVAC systems installed. The chosen systems were as follows: (1) exhaust ventilation with air pressure control; (2) mechanical ventilation with heat recovery; (3) exhaust ventilation with an exhaust air heat pump; and (4) exhaust ventilation with an exhaust air heat pump with a Photovoltaic (PV) panel. This study involved a life cycle assessment that relied on actual material data from the housing company and energy consumption measurements. This study covered a period of 50 years for thorough analysis. A sensitivity analysis was also conducted to account for various future scenarios of energy production. The findings revealed that the building with an exhaust air heat pump exhibited the lowest greenhouse gas emissions and the shortest carbon payback period (GBPT), needing only around 7 years. In contrast, the building with exhaust ventilation without heat recovery showed the highest emissions and the longest carbon payback period (GBPT), requiring approximately 11 years. Notably, the results were significantly influenced by future scenarios of energy production, emphasizing the crucial role of emission factors in determining the environmental performance of distinct renovation scenarios.

    Fulltekst (pdf)
    fulltext
  • 14. Koke, Johannes
    et al.
    Schippmann, André
    Shen, Jingchun
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Zhang, Xingxing
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Kaufmann, Peter
    Krause, Stefan
    Strategies of Design Concepts and Energy Systems for NearlyZero‐Energy Container Buildings (NZECBs) inDifferent Climates2021Inngår i: Buildings, E-ISSN 2075-5309, Vol. 11, nr 8, artikkel-id 364Artikkel i tidsskrift (Fagfellevurdert)
    Fulltekst (pdf)
    fulltext
  • 15.
    Kylén, Maya
    et al.
    Högskolan Dalarna, Institutionen för hälsa och välfärd, Omvårdnad. Lund University, Lund.
    Sturge, Jodi
    University of Twente, Twente, Netherlands.
    Lipson-Smith, Ruby
    Western Sydney University, Westmead, Australia; The Florey Institute of Neuroscience and Mental Health, Heidelberg, Australia.
    Schmidt, Steven M
    Lund University, Lund.
    Pessah-Rasmussen, Hélène
    Skåne University Hospital, Malmö; Lund University, Lund.
    Svensson, Tony
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    de Vries, Laila
    Högskolan Dalarna, Institutionen för hälsa och välfärd.
    Bernhardt, Julie
    The Florey Institute of Neuroscience and Mental Health, Heidelberg, Australia.
    Elf, Marie
    Högskolan Dalarna, Institutionen för hälsa och välfärd, Omvårdnad.
    Built Environments to Support Rehabilitation for People With Stroke From the Hospital to the Home (B-Sure): Protocol for a Mixed Method Participatory Co-Design Study2023Inngår i: JMIR Research Protocols, E-ISSN 1929-0748, Vol. 12, artikkel-id e52489Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    BACKGROUND: A global trend is to move rehabilitation closer to people's neighborhoods and homes. Still, little attention has been given to how the built environment outside the hospital setting might impact rehabilitation and recovery for stroke survivors.

    OBJECTIVE: The overarching objective of this project is to develop conceptual models of built environments that support stroke rehabilitation and recovery outside the hospital setting. Specifically, the project will explore factors and characteristics of the built environment that support people with stroke and their families and identify innovative built environments that can be designed for local health care. The project will examine facilitators and obstacles for implementing built environmental solutions and evaluate the potential benefits, feasibility, and acceptability.

    METHODS: The project uses a mixed methods design approach with 3 phases. In phase 1, factors and characteristics of the built environment for rehabilitation will be identified. Based on the results from phase 1, phase 2 will involve co-designing prototypes of environments to support the rehabilitation process for people with stroke. Finally, the prototypes will be evaluated in phase 3. Qualitative and quantitative methods will include a literature review, a concept mapping (CM) study, stakeholder interviews, prototype development, and testing. The project will use multidimensional scaling, hierarchical cluster analysis, descriptive statistics for quantitative data, and content analysis for qualitative data. Location analysis will rely on the location-allocation model for network problems, and the rule-based analysis will be based on geographic information systems data.

    RESULTS: As of the submission of this protocol, ethical approval for the CM study and the interview study has been obtained. Data collection is planned to start in September 2023 and the workshops later in the same year. The scoping review is ongoing from January 2023. The CM study is ongoing and will be finalized in the spring of 2024. We expect to finish the data analysis in the second half of 2024. The project is a 3-year project and will continue until December 2025.

    CONCLUSIONS: We aim to determine how new environments could better support a person's control over their day, environment, goals, and ultimately control over their recovery and rehabilitation activities. This "taking charge" approach would have the greatest chance of transferring the care closer to the patient's home. By co-designing with multiple stakeholders, we aim to create solutions with the potential for rapid implementation. The project's outcomes may target other people with frail health after a hospital stay or older persons in Sweden and anywhere else. The impact and social benefits include collaboration between important stakeholders to explore how new environments can support the transition to local health care, co-design, and test of new conceptual models of environments that can promote health and well-being for people post stroke.

    INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): DERR1-10.2196/52489.

    Fulltekst (pdf)
    fulltext
  • 16.
    Kölgran, Martin
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Haj Hashish, Mohamad Alamin
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Design av batterilager: En studie kring effekten att placera batterier i byggnader jämfört med containrar2024Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    Abstract [en]

    Battery storage has become more common both in private homes and businesses. As more people choose to install them, the risks associated with them will increase. Most of the batteries that are installed are of the lithium-ion type as they have high energy and power density. The battery carries certain risks that can lead to fire or explosions. To ensure that the batteries do not lose power and to reducethe risks posed by the battery, they should be stored in areas that maintain a constant temperature, often between 20 and 25 degrees. Currently, there are no clearly published rules in Sweden on how batteries should be placed in homes, which can lead to them being placed in the wrong places. The greatest risk is if they are placed inside residential buildings as there is asignificant risk of rapid-fire development in lithium-ion batteries. So, the batteries should not be placed in residential buildings, but in a separate building to reduce the risk of fire in spaces where people sleep. Larger battery stores are often placed in containers, in this study we will investigate if there is a better way to store these batteries by investigating the difference between building a smaller building and adapting a container.The work will be about battery buildings and will investigate the effect of placing batteries in houses compared to storing them in containers. The study will look at different wall constructions and try to find the best. The study emphasizes the importance of integrating energy-efficient measures into building design to minimize operating costs and environmental impacts in the long term. We reduce energy consumption and help preserve the environment and promote sustainable development, by using sustainable materials and the right construction methods.

    Fulltekst (pdf)
    fulltext
  • 17.
    Lin, Jing
    et al.
    Division of Operation and Maintenance, Luleå University of Technology, Luleå.
    Hedekvist, Per Olof
    Division of Measurement Science and Technologies, RISE Research Institutes of Sweden, Borås.
    Mylly, Nina
    Division of Measurement Science and Technologies, RISE Research Institutes of Sweden, Borås.
    Bollen, Math
    Division of Energy Science, Luleå University of Technology, Skellefteå.
    Shen, Jingchun
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Xiong, Jiawei
    Division of Operation and Maintenance, Luleå University of Technology, Luleå.
    Silfvenius, Christofer
    SCANIA Technical Center, SCANIA AB, Södertälje.
    Human-Centric and Integrative Lighting Asset Management in Public Libraries: Qualitative Insights and Challenges From a Swedish Field Study2024Inngår i: IEEE Access, E-ISSN 2169-3536, Vol. 12, s. 40905-40921Artikkel i tidsskrift (Fagfellevurdert)
    Fulltekst (pdf)
    fulltext
  • 18.
    Lin, Jing
    et al.
    Division of Operation and Maintenance, Luleå University of Technology, 97187 Luleå, Sweden;Division of Product Realization, Mälardalen University, 63220 Eskilstuna, Sweden.
    Shen, Jingchun
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. Division of Construction Technology, Dalarna University, 79188 Falun, Sweden.
    Silfvenius, Christofer
    Research and Development Laboratory, SCANIA Technical Center, SCANIA AB, 15132 Södertälje, Sweden.
    Human-Centric and Integrative Lighting Asset Management in Public Libraries: Insights and Innovations on Its Strategy and Sustainable Development2024Inngår i: Sustainability, E-ISSN 2071-1050, Vol. 16, nr 5, s. 2096-2096Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In an era of rapidly advancing lighting technology and evolving public library roles, this study introduces a groundbreaking strategy for human-centric and integrative lighting asset management. Embracing both visual and non-visual effects, “integrative lighting” aims to enhance users’ physiological and psychological well-being. Despite technological progress, notably with LEDs, current asset management often lags, relying on reactionary measures rather than proactive strategies. As public libraries transform into dynamic learning hubs, the significance of indoor lighting, impacting both physical health and holistic well-being, cannot be understated. Yet, many existing solutions are based on controlled lab tests, bypassing the diverse real-world needs of public libraries. Aiming to explore and develop human-centric and integrative lighting asset management strategies to optimize lighting environments in public libraries, this research offers a cohesive approach encompassing context identification, a management framework, and a maturity assessment model. Additionally, this study highlights the synergy between the role of the lighting asset manager, ISO 55000 principles, and these foundational strategies. This holistic approach not only reinvents lighting in public libraries but also aligns it with the broader Sustainable Development Goals (SDGs), advocating for light as a conduit of comprehensive human betterment. The current study is primarily qualitative in nature. While this study is based on public libraries in Nordic countries, the implications and findings can be of interest and value to a broader international audience.

    Fulltekst (pdf)
    fulltext
  • 19.
    Lindblom, Lovisa
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Det framtida klassrummet: En studie av inomhusmiljö i skolbyggnader2024Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    Abstract [en]

    This study deals with previous research and studies on indoor climate in the permanent school, and work environment linked to air quality in the form of indoor carbon dioxide content. An observation, survey and measurement have been carried out at a permanent school which, like many other schools in Sweden, is facing remodeling and new construction. The questionnaire measures the perceived work environment in terms of sound environment, air quality and the design of the classroom. The result showed that mainly the air quality was the aspect that most respondents were not satisfied with. The results of the carbondioxide measurements in a classroom at the school showed that high levels were achieved even though not all students were present at the measurements. The perceived and the measured air quality seem to agree according to the results of the study. A design proposal with improvement measures for a classroom in the school was selected based on the wishes and needs of the survey respondents. The proposal also includes measures for the ventilation, which according to the measurements is on the verge of being too poor, based on the guideline values that exist in Sweden. This is because it can probably be above accepted values if the entire class is in the classroom without any absentees. The study shows, like previous research, that the carbon dioxide content affects the work environment. In this case, on the other hand, the perceived work environment was measured and not students' performance at increased carbondioxide levels. But there is a certain similarity between the studies.

    Fulltekst (pdf)
    fulltext
  • 20.
    Mohamed, Abdullahi Hasan
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Alo, Abdullahi
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Hur utrustade är Sveriges städer för att hantera framtida regnöversvämningar: En fallstudie om Dagvattenhantering i Stockholm (Enskedefältet) och Gävle (Hemsta)2024Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syftet med detta examensarbete har varit att genomföra en fallstudie där dagvattenhanteringen i två områden belägna i lågstråk, nämligen Enskedefältet i Stockholm och Hemsta i Gävle, jämförs. Ökningen av både nederbörd och nederbördsintensitet har resulterat i en ökad risk för översvämningar under de senaste åren, särskilt i områden nära vattendrag och lågstråk. Både Enskedefältet och Hemsta delar liknande karakteristika då de båda är belägna i lågstråk genom vilka dagvatten från omkringliggande områden leds. Dessa två stadsområden kännetecknas av högt exploateringstryck, omfattande hårdgjorda ytor och en övervägande andel privata fastighetsägare, vilket begränsar kommunernas möjlighet att genomföra förbättringsåtgärder. Efter översvämningarna år 2021 genomfördes kapacitetsutredningar både i Enskedefältet och Hemsta. Resultaten visade att den övervägande delen av ledningsnäten uppfyller kapacitetskraven. De regnmängder som orsakade översvämningarna i båda stadsdelarna var sällsynta, och det är inte praktiskt möjligt att dimensionera ledningsnäten för att hantera sådana stora mängder dagvatten. Detta beror på att sådana händelser inträffar för sällan och att det inte är ekonomiskt försvarbart att bygga så stora ledningsdimensioner för att möta dessa extremt sällsynta händelser. Efter översvämningshändelsen 2021 har Gävle kommun agerat snabbt genom att genomföra renoveringar för befintliga ledningssystemet. Dessutom har Gävle kommun utfört omfattande rensning av Hemlingbybäckens botten och byggt underjordiska- och fördröjningsmagasin för rening och fördröjning av dagvatten. Gävle kommun har även utforskat möjligheten att använda multifunktionella ytor, såsom lekplatser för att minska risken för översvämningar. Dessutom har Gävle arbetat med att förstärka beredskapen för att effektivt hantera vattenflödet och därigenom minska risken för framtida översvämningar. I jämförelse till Gävle kommun har Stockholm stad inte reagerat lika snabbt. Trots kapacitetsutredningar utförda av Stockholm Vatten och Avfall, som visade att ledningssystemet uppfyllde kraven, har kommunen inte genomfört åtgärder i samma omfattning. En av de främsta anledningarna till den långsammare reaktionen är den begränsade tillgängligheten till mark, särskilt med tanke på att majoriteten av marken i Enskedefältet ägs av privata fastighetsägare och att det saknas samarbete mellan VA-huvudmännen, kommunen och fastighetsägaren. Detta har begränsat möjligheterna att bygga fördröjningsdammar och andra tekniska dagvattenlösningar. Stockholm stad planerar dock att genomföra fördröjningsåtgärder i samband med planerade renoveringar på kommunägd mark. En av de kommande renoveringarna som planeras är Vårflodsparken, där översvämningsaspekten kommer att beaktas och implementeras i samband med renoveringen. Trots detta har ett större infrastrukturprojekt, kallat Mässtunneln, initierats i västra delen av Enskedefältet, och kapaciteten för ledningssystemet har ökats i den östra delen av Enskedefältet (Slakthuset). Även om dessa förbättringsåtgärder inte är specifikt riktade mot Enskedefältet, kommer de att väsentligt minska mängden dagvatten som leds från dessa områden genom Enskedefältet och därmed också reducera risken för översvämningar.

  • 21.
    Petrovic, Bojana
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. Högskolan i Gävle, Energisystem och byggnadsteknik.
    Life cycle assessment and life cycle cost analysis of a single-family house2021Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The building industry is responsible for 35% of final energy use and 38% of CO2 emissions at a global level. The European Union aims to reduce CO2 emissions in the building industry by up to 90% by the year 2050. Therefore, it is important to consider the environmental impacts buildings have. The purpose of this thesis was to investigate the environmental impacts and costs of a single-family house in Sweden. In the study, the life cycle assessment (LCA) and the life cycle cost (LCC) methods have been used by following the “cradle to grave” life cycle perspective. 

    This study shows a significant reduction of global warming potential (GWP), primary energy (PE) use and costs when the lifespan of the house is shifted from 50 to 100 years. The findings illustrate a total decrease in LCA outcome, of GWP to 27% and PE to 18%. Considering the total LCC outcome, when the discount rate increases from 3% to 5% and then 7%, the total costs decrease significantly (60%, 85% to 95%). The embodied carbon, PE use and costs from the production stage/construction stage are significantly reduced, while the maintenance/replacement stage displays the opposite trend. Operational energy use, water consumption and end-of-life, however, remain largely unchanged. Furthermore, the findings emphasize the importance of using wood-based building materials due to its lower carbon-intensive manufacturing process compared to non-wood choices.  

    The results of the LCA and LCC were systematically studied and are presented visually. Low carbon and cost-effective materials and installations have to be identified in the early stage of a building design so that the appropriate investment choices can be made that will reduce a building’s total environmental and economic impact in the long run. Findings from this thesis provide a greater understanding of the environmental and economic impacts that are relevant for decision-makers when building single-family houses.

    Fulltekst (pdf)
    FULLTEXT01
  • 22.
    Petrovic, Bojana
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. Högskolan i Gävle, Energisystem och byggnadsteknik; NORSUS (Norwegian Institute for Sustainability Research), Kråkerøy, Norway.
    Whole Life Carbon Assessment and Life Cycle Cost Analysis of a Single-family Building2024Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The building sector is responsible for 34% of final energy consumption and contributes to 37% of global CO2 emissions. In alignment with sustainability goals, the European Union has set a target to reduce CO2 emissions in the building sector by up to 90% by 2050. Consequently, there is a great need to examine the climate impact of buildings and adopt a comprehensive perspective using a whole life carbon assessment. The aim of the thesis was to examine greenhouse gas (GHG) emissions and costs throughout all life cycle stages, applying a whole life carbon assessment and life cycle cost analysis for a single-family building situated in a Nordic climate. Additionally, both positive (released) and negative GHG emissions were explored and documented, encompassing operational and embodied impacts. In the thesis, the life cycle assessment and the life cycle cost methods have been applied by following the “cradle-to-grave” life cycle perspective. The study includes an analysis of the reference building design and comparisons with improved building design. 

    The thesis findings highlight a substantial decrease in released GHG emissions with 23% reduction for the analyzed improved building design showing 5.2 kg CO2e/m2/y50 compared to the reference building design showing 6.7 kg CO2e/m2/y50. Moreover, incorporating biogenic carbon and the D module into the cradle-to-grave approach shows the lowest total GHG emissions, manifesting as negative values, -0.7 kg CO2e/m2/y50 for the improved building design. Embodied impact accounts for 79% and 72% of the total impact, while operational impact accounts for 21% and 28% for the reference and improved building designs. When analyzing all building materials, it is shown that an increased share of wooden building materials in the improved building design results in decreased released (positive) GHG emissions and increased negative GHG emissions. The results underscore the significance of using wood-based building materials due to their manufacturing process having lower GHG emissions compared to non-wood solutions. Considering the reference building design, when analyzing the building energy systems, it should be noted that the embodied GHG emissions from the production phase of solar PV panels are considerably higher when compared to emissions from the ventilation system and heat pump. To decrease the embodied GHG emissions during the production phase of solar PV panels, the manufacturing process should be done in countries with a larger share of renewable energy sources in the electricity grid. Moreover, recognizing building materials with low GHG emissions that are economically profitable during the early phases of building design and construction is essential for reducing long-term environmental and economic consequences. Additionally, considering the utilization of reusable building products over new ones could be seen as a winning strategy for mitigating the climate impact in the building sector and decreasing the use of natural resources and waste. 

    Considering the economic impact, it can be noted that the construction costs are greater than operational costs and end-of-life costs comparing all life cycle stages. Approximately 50% of the construction costs are labor costs, followed by investment costs for building materials, installations, and pre-construction costs. Analyzing the building products’ costs, it is important to note that selecting cross-laminated timber (CLT) for a foundation could lead to higher investment costs compared to concrete slabs. 

    In conclusion, the result of the thesis encompasses a whole life carbon assessment in buildings. It underscores the importance of revealing all carbon flows associated with single-family buildings. Finally, the thesis outlines the advantages of utilizing wood-based materials and reusable building products for building owners, contractors, designers, architects, consultants, and other decision-makers. It emphasizes the importance of considering both the environmental and economic aspects of buildings to attain a comprehensive understanding.

    Fulltekst (pdf)
    FULLTEXT01
  • 23.
    Petrovic, Bojana
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. University of Gävle.
    Eriksson, Ola
    University of Gävle.
    Zhang, Xingxing
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Carbon assessment of a wooden single-family building – A novel deep green design and elaborating on assessment parameters2023Inngår i: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 233, artikkel-id 110093Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The aim of this study was to investigate how the carbon accounting of a wooden single-family house is affected by (1) decreasing the carbon footprint by changes in building design, (2) differentiating biogenic carbon from fossil carbon and (3) including external benefits beyond the state-of-the-art system boundaries. The motivation of exploring different system boundaries, improved building design and investigating benefits aside of system boundaries rely on the fact of having the “full” picture of GHG emissions of building products. Changes in building design were analyzed by life cycle assessment (LCA) focusing on greenhouse gas (GHG) emissions, while the costs were assessed by using lice cycle cost (LCC). The findings showed that by including positive and negative emissions from the production phase for an improved building design within scenario 4 ‘Cradle to Gate + Biogenic Carbon + D module’ has the lowest embodied GHG emissions when compared to other approaches with −3.5 kg CO2e/m2/y50. Considering the impacts of the whole building, the lowest GHG emissions are within the scenario 8 ‘Cradle to Grave + Biogenic Carbon + D module‘ for the improved building design with −0.7 kg CO2e/m2/y50. The results suggest that a change to sustainable alternatives for building components that makes the whole building to be constructed by wood, could lead to significant reduction of GHG emissions compared to conventional material choices. Economically, testing sustainable solutions, the highlighted results are the construction costs that are almost double higher for CLT elements for the foundation compared to concrete. © 2023

    Fulltekst (pdf)
    fulltext
  • 24.
    Petrovic, Bojana
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. Department of Building Engineering, Energy Systems and Sustainability Science, University of Gävle, Gävle; NORSUS(Norwegian Institute for Sustainability Research), Kråkerøy, Norway.
    Eriksson, Ola
    Department of Building Engineering, Energy Systems and Sustainability Science, University of Gävle, Gävle.
    Zhang, Xingxing
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Wallhagen, Marita
    Department of Building Engineering, Energy Systems and Sustainability Science, University of Gävle, Gävle.
    Carbon Assessment of a Wooden Single-Family Building—Focusing on Re-Used Building Products2024Inngår i: Buildings, E-ISSN 2075-5309, Vol. 14, nr 3, artikkel-id 800Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Previous research has shown a lack of studies with comparisons between primary (virgin) and secondary (re-used) building materials, and their embodied emissions. The creation of different scenarios comparing the environmental impact of virgin vs. re-used materials is also motivated by the scarcity of raw materials in the world and the emergency of mitigating greenhouse gas (GHG) emissions from buildings. The aim of this study was to investigate scenarios, including new vs. re-used building products, applying the LCA method for a wooden single-family building. The findings showed a 23% reduction potential for total released (positive) CO2e when comparing the Reference scenario with Scenario I, using re-used wooden-based materials. Further, Scenario II, using all re-used building materials except for installations, showed a 59% CO2e reduction potential compared to the Reference scenario. Finally, Scenario III, which assumes all re-used building products, showed a 92% decreased global warming potential (GWP) impact compared to the Reference scenario. However, when including biogenic carbon and benefits (A5 and D module), the Reference scenario, based on newly produced wooden building materials, has the largest negative GHG emissions. It can be concluded that the re-use of building products leads to significant carbon savings compared to using new building products.

    Fulltekst (pdf)
    fulltext
  • 25.
    Petrovic, Bojana
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Zhang, Xingxing
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Eriksson, Ola
    Department of Building Engineering, Energy Systems and Sustainability Science, University of Gävle.
    Wallhagen, Marita
    Department of Building Engineering, Energy Systems and Sustainability Science, University of Gävle.
    Life cycle cost analysis of a single-family house in Sweden2021Inngår i: Buildings, E-ISSN 2075-5309, Vol. 11, nr 5, artikkel-id 215Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The objective of this paper was to explore long-term costs for a single-family house in Sweden during its entire lifetime. In order to estimate the total costs, considering construction, replacement, operation, and end-of-life costs over the long term, the life cycle cost (LCC) method was applied. Different cost solutions were analysed including various economic parameters in a sensitivity analysis. Economic parameters used in the analysis include various nominal discount rates (7%, 5% and 3%), an inflation rate of 2%, and energy escalation rates (2-6%). The study includes two lifespans (100 and 50 years). The discounting scheme was used in the calculations. Additionally, carbon-dioxide equivalent (CO2e) emissions were considered and systematically analysed with costs. Findings show that when the discount rate is decreased from 7% to 3% the total costs are increased significantly, by 44% for a 100-year lifespan, while for a 50 years lifespan the total costs show a minor increase by 18%. The construction costs represent a major part of total LCC, with labor costs making up half of them. Considering costs and emissions together, a full correlation was not found, while a partial relationship was investigated. Results can be useful for decision-makers in the building sector.

    Fulltekst (pdf)
    fulltext
  • 26.
    Ranhagen, Ulf
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. Chalmers, Göteborg.
    Designguide för Smarta gator2022Rapport (Annet vitenskapelig)
    Fulltekst (pdf)
    fulltext
  • 27.
    Ranhagen, Ulf
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. Sweco.
    Methods and tools for co-creation of urban station communities in Chapter 4 Designing processes to integrate knowledge2021Inngår i: Transdisciplinary Knowledge Co-production: A Guide for Sustainable Cities / [ed] Kerstin Hemström, David Simon, Henrietta Palmer, Beth Perry, and Merritt Polk, Practical Action Publishing, 2021, s. 111-117Kapittel i bok, del av antologi (Annet vitenskapelig)
    Fulltekst (pdf)
    fulltext
  • 28.
    Ranhagen, Ulf
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. Sweco.
    Transport Hubs connect the City: A Story from Gothenburg in Chapter 2 Space and Place2021Inngår i: Realising Just Cities / [ed] Leonie Joubert with the Mistra Urban Futures Realising Just Cities Team, African Centre for Cities and Mistra Urban Futures , 2021, s. 33-33Kapittel i bok, del av antologi (Annet vitenskapelig)
    Fulltekst (pdf)
    fulltext
  • 29.
    Shen, Jingchun
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    A Critical Review of Lighting Design and Asset Management Strategies: Illuminating Practices and Lessons Learned for Swedish Public Libraries2023Inngår i: 13th Nordic Symposium on Building Physics, NSB 2023 proceedings, Aalborg, Denmark, 2023Konferansepaper (Fagfellevurdert)
  • 30.
    Shen, Jingchun
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Boyle, Patrick
    Department of Energy and Community Building, Dalarna University, Falun.
    Myhren, Jonn Are
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Offerings and challenges of demand response ventilation under covid-19 scenarios2022Inngår i: Proceedings of the 17th IBPSA Conference Bruges, Belgium, Sept. 1-3, 2021, International Building Performance Simulation Association , 2022, s. 2368-2373Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Owning to the outbreak of COVID-19, individuals have to spend more time indoor. It is therefore essential to prepare for a long-term healthy indoor working environment in the transition of post COVID-19 pandemic. However, there is no relevant research so far in investigating such crisis impacts around indoor environmental quality and economic-health issues while home offices are expected becoming common practice soon. Therefore, a case of single-family house in Sweden is specially investigated using IDA ICE. By comparing four predominant ventilation approaches, three operational schedules are proposed, covering different confinement for occupants. Main results show that the demand response ventilation (DRV) generally should sacrifice in remarkable performance in energy saving, and emission reduction to better confront with more challenges in indoor air quality, occupied thermal dissatisfaction fraction and air stagnation under the challenge of COVID-19 pandemic scenario. Altered ventilation strategy should be customized from increased outdoor air supply, various demand-control signal, displacement method towards a heathier homeworking environment. © International Building Performance Simulation Association, 2022

    Fulltekst (pdf)
    fulltext
  • 31.
    Shen, Jingchun
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Chen, Yang
    Rajagopal, Karthik Hejamadi
    Enhancing Indoor Environmental Quality and Sustainability in Post-Pandemic Office Settings: A Study on Displacement Ventilation Feasibility2023Inngår i: Buildings, E-ISSN 2075-5309, Vol. 13, artikkel-id 3110Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The COVID-19 pandemic has catalyzed global efforts toward transitioning to a sustainable society, driving rapid innovation in building technologies, working practices, building design, and whole life cycle environmental impact consideration. In this pursuit, this study explores the enduring impact of these on an alternative ventilation approach for both existing building renovations and new building implementations. Comparing displacement ventilation to mixed-mode ventilation in a Finnish office building with varying occupancy densities, this study examines indoor air quality (IAQ), thermal comfort, total building energy performance, and embodied carbon. The findings reveal that the basic case of mixed ventilation has a specified system primary energy value of 38.83 kWh/m2 (with 28 occupants) and 39.00 kWh/m2 (with 24 occupants), respectively. With the displacement ventilation alternative, it reduces this by 0.3% and 0.1%, enhancing thermal comfort and decreasing turbulence as well as having a marginal decrease in embodied carbon. In general, the study offers three-fold contributions: insights into post-pandemic office mechanical ventilation design with an emphasis on sustainability and ecological footprint considerations, a concrete case study addressing climate action and human-centric IAQ design, and a multifaceted analysis using the Environmental, Social, and Governance (ESG) paradigm, contributing to the groundwork for associated future research and policy progress.

    Fulltekst (pdf)
    fulltext
  • 32.
    Shen, Jingchun
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Copertaro, B
    Sangelantoni, L
    Zhang, Xingxing
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Influence of Future Climate on Building Performance and the Related Adaptive Solution to New Building Design2022Inngår i: Handbook of Climate Change Mitigation and Adaptation / [ed] Maximilian Lackner, Baharak Sajjadi, Wei-Yin Chen, Springer Nature, 2022Kapittel i bok, del av antologi (Fagfellevurdert)
  • 33.
    Shen, Jingchun
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Huang, Pei
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Zhang, Xingxing
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Tailoring future climate information for building energy simulation2021Inngår i: Data-driven analytics for sustainable buildings and cities: from theory to application / [ed] Xingxing Zhang, Singarpore: Springer, 2021Kapittel i bok, del av antologi (Fagfellevurdert)
  • 34.
    Shen, Jingchun
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Zhang, Xingxing
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Saini, Puneet
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Machine learning and artificial intelligence for digital twin to accelerate sustainability in positive energy districts2021Inngår i: Data-driven Analytics for Sustainable Buildings and Cities: From Theory to Application / [ed] Xingxing Zhang, Singarpore: Springer, 2021Kapittel i bok, del av antologi (Fagfellevurdert)
  • 35.
    Ståhle, Alexander
    et al.
    Spacescape.
    Svensson, Tony
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. KTH.
    Berghauser Pont, Meta
    Chalmers.
    Ranhagen, Ulf
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. KTH.
    Lindstedt, Krister
    White Arkitekter.
    ”Stadens gator behöver inte laddstolpar”2022Inngår i: Svenska Dagbladet, ISSN 1101-2412, artikkel-id 2022-05-14Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
    Abstract [sv]

    Utbyggnad av fasta laddstolpar på stadsgator riskerar att bli ett historiskt misstag, en kortsiktig lösning som kommer stå samhälle och miljö dyrt på lång sikt. Det skriver flera debattörer.

  • 36.
    Svensson, Tony
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. KTH, Stockholm.
    Ranhagen, Ulf
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik. Chalmers, Göteborg.
    Hållbara Stationssamhällen, Samskapande Samhällsplanering, Landvetter södra, Härryda kommun: Delstudierapport 3, Landvetter södra 20212021Rapport (Annet vitenskapelig)
    Fulltekst (pdf)
    fulltext
  • 37.
    Trygg, Evelina
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Fysisk inkludering i bodetableringar2024Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    Abstract [en]

    This project has been an attempt to find out whether it is possible to make building site barracks physically inclusive with the goal of increasing diversity. The result is, among other things, that they can indeed be made inclusive, but that there are often financial obstacles. Suggestions for how building site barracks can be made more inclusive are to raise the standard for physical inclusivness and to introduce, for example, gender-neutral spaces.

    Fulltekst (pdf)
    fulltext
  • 38.
    Wahlberg, Wictor
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Hussein, Majd
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Ett främjande av träbyggnation för flerbostadshus i Dalarna: Betydelsen av samverkan och delade erfarenheter inom branschen för att övervinna utmaningar och öka förtroendet för trä2024Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    Abstract [en]

    In a time where the climate is one of the most important issues and challenges in politics, both nationally and globally, the social debate is moving towards the need to build more sustainably, where wood is becoming increasingly popular from a sustainability perspective. The study examines the possibilities for an increased use of wood in Dalarna by highlighting the obstacles and challenges that slow down the progression of wood construction. It is also examined how an extended collaboration between the actors in the construction sector and how previous experiences with wooden construction projects can increase confidence in the material and promote wooden construction. The study is conducted through qualitative interview studies with active actors in several levels within the construction sector. A total of 9 respondents participates in the study from different parts of the process; clients, project designer, the wooden industry and construction contractor to form a deeper understanding of the subject from different perspectives within the construction sector. It describes a positive attitude towards wood as a building material with visions of expanding constructions with more wood as a frame material where confidence in the material is high. The biggest challenges for wood as a building material are described as a lack of knowledge and prejudices within both the industry and the market. Other challenges to ensure a promotion of the material, which heights in detailed development plans were explained. Strategies and needs to promote the work of implementing wood in more projects are described where it is a matter of facilitation, not a requirement to ensure wooden constructions. It appears that ignorance regarding fire and moisture are the most common prejudices in the industry, which is confirmed by the theoretical framework. Today's building regulations allow the use of all types of frame materials, but the ignorance regarding fire properties and how wood as a material handles being exposed to moisture is a problematic challenge. An expanded industry collaboration where shared knowledge and experience between the actors in the creation of and participation in forums is an important factor in promoting wood in construction projects as described in the theoretical framework. An increased degree of completion and streamlining of the assembly process would give wood several additional advantages.

    Fulltekst (pdf)
    fulltext
  • 39.
    Zhang, Xingxing
    et al.
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Shen, Jingchun
    Högskolan Dalarna, Institutionen för information och teknik, Byggteknik.
    Saini, Puneet
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Lovati, Marco
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Han, Mengjie
    Högskolan Dalarna, Institutionen för information och teknik, Mikrodataanalys.
    Huang, Pei
    Högskolan Dalarna, Institutionen för information och teknik, Energiteknik.
    Huang, Zhihua
    Telenor Connexion AB, Stockholm.
    Digital Twin for Accelerating Sustainability in Positive Energy District: A Review of Simulation Tools and Applications2021Inngår i: Frontiers in Sustainable Cities, E-ISSN 2624-9634, Vol. 3, artikkel-id 663269Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    A digital twin is regarded as a potential solution to optimize positive energy districts (PED). This paper presents a compact review about digital twins for PED from aspects of concepts, working principles, tools/platforms, and applications, in order to address the issues of both how a digital PED twin is made and what tools can be used for a digital PED twin. Four key components of digital PED twin are identified, i.e., a virtual model, sensor network integration, data analytics, and a stakeholder layer. Very few available tools now have full functions for digital PED twin, while most tools either have a focus on industrial applications or are designed for data collection, communication and visualization based on building information models (BIM) or geographical information system (GIS). Several observations gained from successful application are that current digital PED twins can be categorized into three tiers: (1) an enhanced version of BIM model only, (2) semantic platforms for data flow, and (3) big data analysis and feedback operation. Further challenges and opportunities are found in areas of data analysis and semantic interoperability, business models, data security, and management. The outcome of the review is expected to provide useful information for further development of digital PED twins and optimizing its sustainability.

    Fulltekst (pdf)
    fulltext
1 - 39 of 39
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • chicago-author-date
  • chicago-note-bibliography
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf