uu.seUppsala University Publications
Change search
Refine search result
1234 1 - 50 of 151
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Abrahamsson, Caroline
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Waltersson, Johanna
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    FLEXIBLA BYGGNADER: Utformning av en förskola med en möjlig verksamhetsändring för framtida behov2014Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Society today has an increasing demand for environmentally and economically sustainable developments in order to create a sustainable society. Society’s growth in new construction is a big part of this, and by planning and building more sustainable buildings these requirements can be fulfilled. The development of flexible buildings, which can adapt to future needs of society, lead to a more efficient utilization and longevity of premises and generate more sustainable buildings.In Sweden, the municipalities are the country’s largest property developers and therefore have a significant responsibility to provide society with real estate and public buildings. In recent time we have seen a shift towards flexible public buildings and in particular preschools. With the current socio-economic climate and ageing population buildings like preschools need to be flexible to ensure they can cater for future demands of society.

    This degree project, within the Bachelor programme in Construction Engineering, has been carried out during 10 weeks on Tengbom Architects in Uppsala. The thesis deals with the subject of flexibility in buildings and includes a proposal for the design of a flexible building as a pre-school that in the future can be converted into a retirement home.

  • 2.
    Ajamlou, Robin
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Nyman, Emma
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Provisorisk takbelysning vid byggarbetsplatser: En studie av belysningens funktion och dess påverkan på yrkesarbetaren2018Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report explores the definitions of general- and work lighting in an indoor construction site and how the lighting affects a construction worker. This in order to clarify the controversial topic of: which purpose the ceiling lighting has, thus making the lighting plan optimal. This study was made in cooperation with Skanska Sweden AB. The main ceiling lighting-device in Skanska Sweden is a custom made LED-lamp which is the main tool that this research is based on. The main research methods are project site visits, interviews and surveys in combination with literature studies, and also practical measurements and simulations of the LED-lamps. The results of the interviews and surveys show that comprehension of the functions of the ceiling lighting varies among Skanska Sweden employees. While construction workers generally refer to work lighting when addressing ceiling lighting, the managers tend to refer to general lighting or as a tool to orientate the building. Although, how general lighting is defined, varies among the employees. With that said, the simulations reveal that a reasonable amount of a ceiling lighting will not fulfil the requirements for work lighting for all construction operations. Furthermore, our results from the interviews and surveys confirm those from previous studies; that lighting is essential for the well-being of people. A poorly illuminated workspace dulls one’s work performance and effects one’s health in both the short- and long terms. A well-lit workspace can, on the other hand, reduce the potential health and safety risks on a construction site and also ease multiple work tasks. There are currently no clear assembling routines of ceiling lighting. Therefore, to create consensus on the purpose of lighting and the health and safety prospects that come with it, this report recommends possible solutions and clarifications of the issues and misinterpretations in the matter.

  • 3. Alev, Ullar
    et al.
    Eskola, Lari
    Arumägi, Endrik
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Art History.
    Jokisalo, Juha
    Donarelli, Anna
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Art History.
    Siren, Kai
    Broström, Tor
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Art History.
    Kalamees, Tango
    Renovation alternatives to improve energy performance of historic rural houses in the Baltic Sea region2014In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 77, p. 58-66Article in journal (Refereed)
    Abstract [en]

    This paper analyses renovation alternatives to improve energy performance of historic rural houses in three countries (Estonia, Finland, Sweden) in the Baltic Sea region (cold climate). The study was conducted by a combination of field measurements and simulations. Indoor climate, typical houses and structures as well as the current condition and need for renovation were determined by field measurements. Based on field measurements, indoor climate and energy simulation models were validated and used to calculate energy use for different renovation measures. Energy renovation packages were calculated for different scenarios (minimal influence on the appearance of the house, improvement of thermal comfort, improvement of building service systems) for different energy saving levels. The analysis showed that the improvement of building service systems and the energy source holds the largest energy saving potential. The building envelope of old rural houses needs improvement also due to high thermal transmittance and air leakage. The insulation of the external wall has the largest single energy saving potential of the building's envelope. The results show how energy savings depend on energy saving targets, typology of the building, thermal transmittance of original structures, and building service systems. (C) 2014 Elsevier B.V. All rights reserved.

  • 4.
    Andersson, Frida
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Stabilitet och tillåten rörelse hos flervåningsbyggnader: Analys av höga byggnaders begränsningar till dynamiska krafter och svängningar2018Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    One of the challenging design areas of high buildings is the determination of its stability and response to dynamic forces. These factors affect the horizontal deformations and fluctuations that the building will result in. This report examines the demands placed on the stability and deformations of high buildings through a literature study as well as examines these requirements with a reference building built into FEM-Design. The literature study shows that quite a few standards have to be taken into account and used in the design of tall buildings. Regarding limit values, only SS-ISO 10137 specifies maximum values for a building's peak acceleration relative to its own frequency. Limit values for transient deformations are not available. Furthermore, the literature study shows that plenty of studies of human perception and tolerance to movements in buildings have been performed. The movements have been shown to cause physical andmental discomfort if exaggerated, which SS-ISO 10137 bases its limits after. The 75-meter reference building, modeled in FEM-Design, was built to calculate the building's own frequency, transient deflection, and self-weight. The wind loads have been calculated separately and entered into the program. Calculations for the building's peakacceleration have then been calculated and compared to the limitvalues in SS-ISO 10137. The structure of the reference building, consisting of 25-storeys in concrete, met the standard requirements for housing and should be able to be built without the risk of discomfort among the residents. Other inputs were 250 and 200 mm floor and wallthickness in C25 / 30 and VKR pillar in each corner, 200x200x10 mmin quality S355. The plan levels are square 21.8m wide andidentical to all 25 levels.The model-building met the requirements for living space accordingto SS-ISO 10137 with respect to peak acceleration and frequency. However, the calculated horizontal deformations did not have anylimit values to be compared to and were therefore not compared to any restrictions.

  • 5.
    Andreasson, Josefine
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Falck, Sandra
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    När befintligt ska bli nytt: Optimering av ombyggnation i befintlig kontorslokal2016Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Vid utformning av kontor är krav på arbetsmiljö, tillgänglighet, trivselfaktor och att kunna påvisa sitt varumärke i kontoret av vikt. För att kontoret ska bidra till ett positivt arbetsklimat och ett effektivt arbetssätt bör även utformningen anpassas till den specifika verksamhet som bedrivs. Ett kontor med attraktiv utformning och bra arbetsmiljö ökar organisationens attraktionskraft mot befintliga och framtida medarbetare.

    Rapporten behandlar krav och aspekter att beakta vid ombyggnation av kontor och planering av ny kontorstyp i existerande lokaler. Med ett befintligt kontor finns givna förhållanden som ska tas hänsyn till och därför sammanfattas fakta om tekniska- och social aspekter som är av vikt vid valet av kontorstyp. Tekniska aspekter är ljud, ljus, luft, temperatur, bärande byggnadsdelar, vatten och avlopp, brand och el. Sociala aspekter innefattar ergonomi, kulörval, medarbetarhälsa, digitalisering, estetik och inredning. Olika kontorstyper beskrivs och utformningskrav från lagar och branschföreskrifter presenteras.

    Utförd studie baseras på en fallstudie av Skanskas kontor i Uppsala där en behovsanalys utförs och ett förslag på aktivitetsbaserad kontorslösning presenteras. 

  • 6.
    Apel, Gustav
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Industrial Engineering & Management.
    Dahlbom, Emil
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Industrial Engineering & Management.
    En studie i incidentrapportering2018Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Working environment is becoming an increasingly important subject in Sweden and especially in the construction industry. The reduction of accidents is a long-term task and part of achieving this is to report incidents that may cause an accident. Reporting of incidents and risk observations is seen as a tool for working proactively against accidents. In order to handle and compile these reports, a system is required. Currently JM is using a web-based system, BIA, and this is also used by many other companies within the industry. One problem according to JM is that the amount of reports are too few compared to how many incidents that actually occur at construction sites. Another is that some of the reports that come in have too little information or contains incorrect information. An interview study was conducted to find out what those working on construction sites think about incident reporting. The study was conducted in the regions Stockholm Nord and Region Öst, Uppsala. A result from the interviews is that reporting in the BIA can be considered as tedious and sometimes confusing. There are a number of improvements that should be implemented to make the process smoother. Amongst them is to make the program more user friendly and make it clearer. Some employees also lack the knowledge to differ between different types of incidents.

  • 7.
    Appelgren, Jörgen
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Kjellström, Fredrik
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    LCC-analys av FTX-system: En jämförelse av centralt- och lägenhetsplacerat2011Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report is the result of a thesis conducted at the consulting firm Bjerking AB andis the final part of the Bachelor Programme in Construction Engineering at Universityof Uppsala. The work aims to investigate the costs and how the choice of ventilationsystem affects building projects during a long-term period. This report covers costssuch as investment, maintenance and energy but also how they affect residents andbuilders. Building regulations for energy consumption are expected to be tougher;therefore a comparison of two different heat recovery ventilation systems(HRV-system) was made. One system is based on a centrally placed unit that coversthe whole buildings ventilation through vertical shafts. The second system is based onapartment placed unit that only covers the individual apartment’s ventilation. The unitmakes it possible for the individual user to control the ventilation flow.The method used for comparison of the costs was Life Cycle Cost (LCC). It results inthe total cost during a selected calculation period of 20 years, where yearly basedcosts as energy and maintenance is included. Two housing projects in central Uppsalawere chosen as a reference. They were similar in design but with the two differentsystems of ventilation. A questionnaire was handed out to provide experience fromresidents with apartment units. The results were used in the analysis of the systemsand to determine its pros and cons.Information of costs was collected from different companies and resulted intocustomized spreadsheets to determine the cost per apartment. The result shows thatthe difference in investment is not significant between the systems but is big inmaintenance and energy. The biggest difference is maintenance where the apartmentsystems many service points is increasing the cost. Energy consumption for theapartment system leads to higher energy costs than with a central system, even if thecontrol function is used. The explanation is that a central systems fans have lowerpower usage and the heat recovery is more efficient then an apartment system.The conclusion is that a central system has a lower total cost compared to anapartment system during the calculation period. A reason for choosing the apartmentsystem would be if a need to maximize living space is a priority, and the developingphase of the project is well thought thru.Keywords: LCC-analysis, HRV-systems, Central unit, Apartment unit.

  • 8.
    Arumägi, Endrik
    et al.
    Chair of Building Physics and Architecture, Tallinn University of Technology, Estonia.
    Kalamees, Targo
    Chair of Building Physics and Architecture, Tallinn University of Technology, Estonia.
    Broström, Tor
    Gotland University, School of Culture, Energy and Environment.
    Indoor climate in a naturally ventilated unheated medieval church in Harju-Risti, Estonia2010In: 10th REHVA World congress Clima 2010: Sustainable Energy Use in Buildings, 2010Conference paper (Refereed)
    Abstract [en]

    Indoor climate in a naturally ventilated unheated medieval church was analysed to determine if the conditions existing suit for three medieval wooden sculptures forming the Calvary group that were decorated the church until 1958. The values of temperature and RH were measured with data loggers at 1-h intervals inside and outside the church. Ventilation measurements were performed using a passive tracer gas technique. The current study shows that there is a considerable risk in bringing back the medieval sculptures forming the Calvary group to the Harju-Risti Church without creating conditions for indoor temperature and humidity regulation. To start risk assessment it is required to maintain a RH level that prevents the risk of mould growth, reduce fluctuations of air RH annually and in the short term period, avoid of too high and too low humidity levels in church that could cause flaking, peeling and cracking of wooden sculptures.

  • 9.
    ASHRAE Technical Committee 9.8,
    et al.
    American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc..
    Grzywacz, Cecily M.
    Getty Conservation Institute.
    Maybee, Phil
    The Filter Man Ltd..
    Holmberg, Jan
    Gotland University, Department of Integrated Conservation.
    Fjaestad, Monika
    Riksantikvarieambetet.
    Chapter 21 ASHRAE Handbook Applications 2007: Museums, Galleries, Archives and Libraries2010Report (Other academic)
    Abstract [sv]

    Inom ramen for Energimyndighetens projekt “Spara och bevara” har Högskolan på Gotland bearbetat och översatt kapitel 21 i “2007 ASHRAER HANDBOOK Heating, Ventilation and Air-Conditioning APPLICATIONS”. ASHRAE är namnet på den amerikanska ingenjörsorganisationen American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. baserad i Atlanta i USA. Bearbetningen är gjord av Tekn.Dr. Jan Holmberg vid Högskolan pa Gotland i samarbete med konservator Monika Fjaestad vid Riksantikvarieambetet. Syftet med denna publikation är att på svenska sprida de utomordentligt väl underbyggda översikter av problem att beakta vid förebyggande konservering och energibesparing i historiska hus och kyrkor, som presenteras i kapitel 21.

  • 10.
    Backåker, Johan
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Harder, Jonas
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Utvecklingsanalys av installationssystems montering vid industriellt träbyggande: Värme, vatten, ventilation, el och avlopp2013Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The industrialized timber housing process is capable nowadays to build multi-storeyhouses since fairly new changes in the Swedish regulations where made after theadmission of the European Union in 1994.The industrialized process moves parts of the construction process into a highlyeffective factory where 3D-volumes of the building are prefabricated beforetransportation to the building site for assemble.The assembly process is relatively effective compared to the completion of thebuilding service system and this is therefore the main focus in this thesis. This thesisattends problems with completion of the building service system, and thereforedemarcates from other aspects, such as technical and economic aspects, of thebuilding service system.The degree of completion of the flats differs from completion of the connectivepassages, for example hallways, in a way that suggests a need for further investigation.This thesis includes analysis of the possibilities to increase the prefabricatedconnective passages, to the extent of containing building service systems.An increase of the prefabrication of the building service system has a greatdevelopment potential, even though some restraining factors need to be solvedbefore implementation.This thesis was made in collaboration with two of Sweden’s leading companies on themarket of multi-storey industrialized timber housing, Moelven ByggModul AB andLindbäcks Bygg AB.

  • 11.
    Balksten, Kristin
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Broström, Tor
    Gotland University, School of Culture, Energy and Environment.
    Myrin, Malin
    Tyréns AB.
    Thelin, Carl
    Tyréns AB.
    Kettunen, Rebeca
    Gotland Museum.
    Mebus, Ulrika
    Gotland Museum.
    Increased use of ruins through secured masonry and comfortable climate2010In: Proceedings of the 7th International Conference on Science and Technology in Archaeology and Conservation, Petra, Jordan, 2010Conference paper (Other academic)
    Abstract [en]

    This paper presents a unique scientific research project, funded by the KK-foundation in Sweden together with several companies participating in the project. A primary goal is to find methods to examine and take care of open masonry constructions thereby enabling an increased use of them in a safe and comfortable way without diminishing their cultural values. A second goal is to establish a long-term cooperation/network of researchers, conservators, engineers, antiquarians and craftsmen that can keep and develop the knowledge. The project takes place in year 2010 and 2011. This paper presents a model of cooperation as well as the ongoing experiment and expected results. The project is divided into three major parts:1) Description and assessment of historic masonry as load bearing structures. 2) Assessment of stone and mortar in old masonry and finding the methods to secure and preserve them. 3) The climate in the ruin with respect to comfort and preservation. The goals for the different parts of this research project are to find the best possible solutions of how to: a) Evaluate the construction of complex masonry structures to enable new additions that are appropriate with respect to statics. b) Find efficient methods to evaluate and conserve the status of the materials (stone, mortar) and walls in old masonry to grant safe accessibility. c) Create a comfortable climate in an open masonry structure without closing it. These three research areas all focus on the historic masonry which at the same time forms the climate shell, the bearer of plaster and the historical setting to the activities that are to take place in the ruin.

  • 12.
    Balksten, Kristin
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Steenari, Britt-Marie
    Department of Chemical and Biological Engineering, Environmental Inorganic Chemistry, Chalmers University of Technology, Gothenburg, Sweden.
    The influence of particle size and structure in hydrated lime on the properties of the lime putty and lime mortar2010In: International journal of architectural heritage, ISSN 1558-3058, Vol. 4, no 2, p. 86-101Article in journal (Other academic)
    Abstract [en]

    In this work, scanning electron microscopy (SEM) analysis of lime slaked in different ways and analysis of thin section of lime putty and mortar specimens by light microscopy was combined with practical tests and field studies to evaluate the impact of the slaking technique on the properties of the lime putty as well as the structure of the fresh and carbonated mortar. The lime slaking methods studied were wet slaking and earth slaking, giving lime putties with very different consistency and workability. The aim of this work was to use microscopy techniques to explain these differences in properties and to investigate if it is possible to use these analytical methods to recognize the lime-slaking technique used in a historical lime mortar. The results obtained by SEM show significant differences in structure between the lime putties. The earth-slaked lime consists of relatively large particles that are packed in a porous system compared with the wet-slaked lime with very small particles closely packed in a dense structure. After storing, the wet-slaked lime gives a putty that has a dense and clearly defined stratified structure, whereas the earth-slaked lime is porous and has no stratification.

  • 13.
    Berefelt, Erik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Olsson, Linn
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Utvärdering av olika metoder för fuktstyrning i kyrkor2017Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis examines three medieval churches within Lagunda parish in Örsundsbro.The parish has previously had problems with mould growth and has therefore, inselected churches installed various types of moisture control, together with devicesfor measuring temperature, relative humidity and mixing ratio, at three locations inthe churches. The moisture control should in an energy efficient way reduce the riskof mould growth and thus reduce the future maintenance costs.

    The purpose of this thesis is to analyse the results and to see how the moisturecontrol measures has worked in the churches. The data has been collected in theprogram Omnisens and compiled by Magnus Wessberg at Uppsala University, whichresulted in diagrams that include relative humidity and mould risk, which theanalysis has been based on. Two different moisture control measures have beenused in the churches that this thesis examines. The measures are condensationdehumidifier and moisture controlled ventilation.

    The result is varying between the churches but shows that there has been a needfor moisture control that reduces the relative humidity indoors. The energy usagehas differed between the measures, but should not be crucial when deciding onfuture measures.The result also shows that the indoor climate is largely influencedby rainfall and that the church's organs in the study should be taken into account infuture measure, since the result when there is a risk of mould differs from otherparts of the churches.

  • 14.
    Berg, Fredrik
    et al.
    Norwegian Inst Cultural Heritage Res NIKU, Dept Bldg, Oslo, Norway.
    Donarelli, Anna
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Art History, Conservation.
    Energy Performance Certificates and Historic Apartment Buildings: A Method to Encourage User Participation and Sustainability in the Refurbishment Process2019In: The Historic Environment: Policy & Practice, ISSN 1756-7505, E-ISSN 1756-7513, Vol. 10, no 2, p. 224-240Article in journal (Refereed)
    Abstract [en]

    This article presents and discusses the challenges of refurbishing historic apartment buildings by correlating findings from research projects LEAF and CulClim. Our aim is to shed light on how residents can partake in and optimise the refurbishment process after energy performance certificates (EPC) have been conducted. The background is that historic apartment buildings are generally more complex than single family buildings with respect to the energy efficiency process as they often have multiple owners with different priorities. The case studies from Norway and Sweden have conceptually contrasting energy performance certificate (EPC) systems. Identified advantages and shortcomings concerning both systems are discussed. In Sweden, the restrained recommendation of measures can lead to national mitigation targets not being realised. In Norway, excessive and unqualified recommendations risk reducing the cultural heritage values of the existing building stock as well as having a negative environmental impact on greenhouse gas emissions. A bottom-up approach incorporating the resident's objectives is presented and discussed. Results suggest that improved EPC-systems and a broadened procedural approach to decision making will ease the process and improve the outcome of the refurbishment with respect to both energy and heritage aspects.

  • 15. Berggren, Björn
    et al.
    Wall, Maria
    Widén, Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Karlsson, Björn
    Att definiera nollenergibyggnader: En internationell angelägenhet2012In: Bygg & teknik, no 2, p. 21-23Article in journal (Refereed)
  • 16.
    Berglund, Gabriella
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Utveckling av fastighet i Uppsala innerstad: Förslagshandlingar till flerbostadshus för studenter2015Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • 17.
    Bjurman, Jonny
    et al.
    Department of Conservation, University of Gothenburg, Gothenburg, Sweden.
    Leijonhufvud, Gustaf
    Gotland University, School of Culture, Energy and Environment.
    An analysis of microclimate differences leading to sporadic mould growth in Skokloster Castle, an unheated historic building2012In: Energy Efficiency in Historic Buildings: Postprints from the Conference : Visby, February 9–11, 2011, Gotland University Press, 2012, p. 236-244Conference paper (Other academic)
    Abstract [en]

    Mould growth has repeatedly occurred in Skokloster Castle over the years. Visible mould was also found during a survey in September 2010. Mould has been found sporadically on walls, books and tapestries and behind paintings and within furniture in parts of the castle. Work is presented on the attempted correlation of incidence of mould growth and indoor climate recorded mainly during one year, from July 2008 to August 2009. The indoor climate is influenced to a high extent by the outdoor climate but is clearly improved by the influence of the building envelope. The absolute humidity is almost the same in the whole castle. Temperature differences between rooms are therefore decisive for the recorded differences in RH. Recorded RH differences could partly explain the location of mould growth. The results are discussed in relation to current models describing the critical levels of RH, temperature and substrates supporting mould growth.

  • 18.
    Björk, Fredrika
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Art History.
    Tiden är kommen: En studie av 1960-talets tegelfasader med Mjölkuddskyrkan, Luleå Stift, som exempel2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this paper is to draw a picture of the factors that influence the 1960s brick facades, yesterday as well as today. The goal is to explore the possibilities for long-term preservation of the buildings from this period (“Rekordåren”, 1960s). Which was the current thoughts about the lifecycle of buildings at the time of the erection? Which facade materials were common for these years and what damage do they exhibit today? What type of restoration measures have been implemented regarding these brick facades and with what result? What´s the possibilities for long-term preservation of historically valuable buildings from these years? Questions are asked in order to help in the understanding of these buildings, with need for repair now and in the future. Through archival and literature studies, interviews and inspections this paper examines the issue of the need for maintenance of a material cultural heritage in connection with the issue of the conditions for a cultural object and its creation, maintenance and ultimately its survival.

  • 19.
    Blom, Henrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Thored, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    STABILA HÖGHUS I TRÄ: En analys av infästningars inverkan på accelerationer och utböjningar i ett 15-våningshus av trä2016Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In today’s society cities grow increasingly larger, not only on the ground but vertically as well. Utilizing height means taller buildings, which often are large steel- and concrete constructions. Why not construct tall buildings out of timber instead, a material by many believed to be far better from an environmental perspective than steel and concrete? The answer lies in the lack of knowledge regarding tall timber constructions and the stresses they need to withstand.

    The report was conducted at the construction consulting company Bjerking AB, Uppsala. The focus in this report was to examine accelerations and deformations as an effect of wind loads. The issue at hand was whether the connections between building elements affect the dynamic responses that occur.

    The chosen model was a 15 storey timber building whose walls and floors consisted mainly of cross laminated timber elements as the load bearing structure. As a large amount of the analyses were complex, the calculations were made in the computer program FEM-Design, which is a finite element program.

    After performing numerous calculations with different settings, a result emerged. Clear trends could be seen in the connections’ influence on accelerations and deformations. A stiffer connection makes the building more resistant to wind loads. This result has to be considered when constructing tall timber buildings to avoid problems with accelerations and deformations. However, merely adjusting the connections to meet requirements is not sufficient, other measures are also needed.

  • 20.
    Borg, Jakob
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Construction Engineering.
    Produktionsplanering av plattbärlag2007Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Detta arbete har jag skrivit i samarbete  med företaget Färdig Betong(FB) som tillverkar plattbärlag, dvs förtillverkade betongelement till bjälklag i hus. Till största del handlar arbetet om mängd och tid dvs. om och när fabrikerna kan leverera.   Jag tittade även på lagrets inverkan på produktionen. Det visade sig att obalans i lagret hade  oönskade effekter, såsom brist på ritningar vid för stort lager och riskerad leveranssäkerhet vid för litet lager .  Jag försökte hitta en formel som tog hänsyn till både aktuell produktion och lagret vid ett beslut om order. Efter olika försök så kom jag fram till en formel som uppfyllde de olika kriterierna.  I beläggningsplaneringen har varje projekt en rad och antalet m 2  lades in  på de aktuella  veckorna. En undersökning på byggarbetsplatserna visade att de planerade i större leveransdelar än m 2 . Detta gav mig iden att planera produktionen och leveranserna på ett liknande sätt.  FB utryckte önskemål om att uppnå en  högre precision under planeringsprocessen. Jag utvecklade då ett gränssnitt för produktionsplaneringen som de tror kan höja precisionen.   

  • 21.
    Brandt, Josef
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Passivhus med prefabelement: En jämförelse mellan en platstillverkad konstruktion och prefabelement från Masonite Lättelement AB2011Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis conducted at the University of Uppsala investigateshow well a prefabricated building component from the manufacturerMasonite Lättelement AB can be incorporated into ahouse projected to accomplish the demanding criteria of a passivehouse. The thesis is organized as a comparison betweenthe prefabricated elements and an on-site built component fromthe passive house area of Oxtorget in Värnamo, Sweden. Theaspects investigated were air leakage, energy, moisture, economyand noise conditions.Results of the comparative analyzes shows that the prefabricatedproducts were capable of accomplishing the requirementsof passive houses and therefore this thesis should beviewed as a basis to confirm that the technology of prefabricatedbuilding components today in Sweden are mature enoughto be a significant part of the passive houses that are to be builtin the near future. The development of prefabricated technologyis of crucial significance if we are to accomplish the goalsof reduced energy consumption by the year 2020.

  • 22.
    Broström, Tor
    Gotland University, School of Culture, Energy and Environment.
    Handbok i hållbar energianvändning för kyrkan2008Book (Other academic)
    Abstract [sv]

    Kyrkans skapelseansvar går hand i hand med vårt gemensamma ansvar för en hållbar livsstil och jordens överlevnad. Handbok i hållbar energianvändning för kyrkan ger handfasta ekonomiska tips på hur man kan effektivisera energianvändningen i kyrkans byggnader. I boken tar bl.a. upp: Ventilation, fjärr- och närvärme, belysning, energideklarationer, vattenförbrukning, solvärme, klimatskal och isolering, transporter, energispartips och biobränsle. Boken ger också råd om uppvärmning och vad som är viktigt att beakta vid ändrad användning av kyrkobyggnaden. Boken vänder sig i första hand till verksamhets- och driftsansvariga i församlingar, samfälligheter och stift, men också till miljösamordnare och antikvarier.

  • 23.
    Broström, Tor
    Gotland University, Department of Integrated Conservation.
    Luft-luftvärmepumpar för skyddsvärme i kyrkor2010Report (Other academic)
    Abstract [en]

    The use of air-to-air heat pumps in a church has been investigated with respect to preservation aspects and energy efficiency. The paper discusses the general problem and presents the results from a case study. The temperatures, velocities and humidity in the church have been measured for four different heating modes. The study shows that there is a significant potential for energy savings with heat pumps and that temperature distribution and air movements are comparable to conventional heating.

  • 24.
    Broström, Tor
    Tekniska högskolan i Stockholm. Institutionen för energiteknik.
    Uppvärmning i kyrkor: fukt- och värmetekniska beräkningar för dimensionering och klimatstyrning1996Doctoral thesis, monograph (Other academic)
  • 25.
    Broström, Tor
    et al.
    Gotland University, Department of Integrated Conservation.
    Borgö, Louise
    Thulin, Christine
    Textilskåp med fuktstyrning2010Report (Other academic)
    Abstract [en]

    The objective of the present project was to develop and evaluate a solution forstorage of textiles in humid indoor environments, in this case churches. The proposed solution is based on creating a microclimate in the storage cabinets separated from the rest of the building. The cabinets were made air tight and insulated. With the use of a simple control system for conservation heating, the relative humidity can be kept below dangerous levels. The project comprises development and evaluation of textile cabinets in three churches on Gotland, Sweden. Measurements over one year show that cabinets with climate control are a simple and reliable method to prevent mould growth. Overall, the control systems have worked according to expectations. The relative humidity and temperature in the cabinets was maintained within a safe interval.

  • 26.
    Broström, Tor
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Hagentoft, Carl-Eric
    Chalmers University of Technology.
    Wessberg, Magnus
    Gotland University, School of Culture, Energy and Environment.
    Humidity Control in Historic Buildings through Adaptive Ventilation: a Case Study2011In: NSB 2011: 9th Nordic Symposium on Building Physics, 2011, p. 1-8Conference paper (Refereed)
    Abstract [en]

    Adaptive ventilation, controlled with respect to absolute humidity inside and outside a building, canbe used to reduce RH below risk levels for biodeterioration. In the present case study, adaptiveventilation was used in a historic stone building with severe moisture problems. Measurementscarried out over a year shows that ventilation had a significant drying effect. The mould risk is keptat an acceptable level with exception of two short periods .Short term variations in RH are acceptableaccording to conservation standards. Heating or dehumidification as an auxiliary measure would beneeded only for a short period of time. The performance can be improved by increased fan capacityand improving air tightness of the building.

  • 27.
    Broström, Tor
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Klenz Larsen, Poul
    Gotland University, School of Culture, Energy and Environment.
    Climate control strategies for occasionally used churches: heat, dehumidify, ventilate – or do nothing2012In: Cultural heritage preservation : EWCHP- 2012: proceedings of the 2nd European workshop on cultural heritage preservation / [ed] Elin Dahlin, Kjeller: NILU, Norwegian Institute for Air Research , 2012, p. 124-130Conference paper (Refereed)
  • 28.
    Broström, Tor
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Leijonhufvud, Gustaf
    Gotland University, School of Culture, Energy and Environment.
    Heat pumps for conservation heating2008In: Proceedings of the 8th symposium on building physics in the Nordic countries: Copenhagen, June 16-18, 2008 / [ed] Carsten Rode, Lyngby: Technical university of Denmark , 2008, p. 1143-1150Conference paper (Refereed)
    Abstract [en]

    Conservation heating is used to control relative humidity in order to better preserve historic buildings and their interiors. The heating load for conservation heating when applied in a Nordic climate was characterized in order to investigate if and how air-to-air heat pumps can be used for conservation heating. Heating for conservation results in indoor temperatures that follow the seasonal variation of the outdoor temperature. Depending on the season and moisture load on the building, the indoor temperature will be 0-10 °C higher than the ambient temperature. The heating load is much smaller and more stable over the year as compared to heating for comfort. In the south of Sweden conservation heating is motivated mainly by preservation aspects, whereas in northern Sweden the potential for energy saving is considerable. Heat pumps in general and air-to air heat pumps in particular, have properties that match the requirements of conservation heating and can provide a cost effective solution. Heat pumps specially designed for conservation heating could improve the performance radically in relation to standard heat pumps.

  • 29.
    Broström, Tor
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Leijonhufvud, Gustaf
    Gotland University, School of Culture, Energy and Environment.
    Hållbarhet och byggnadsvård2011In: Energiboken: energieffektivisering för småhusägare / [ed] Eva Löfgren & Paul Hansson, Stockholm: Svenska byggnadsvårdsföreningen , 2011, p. 34-45Chapter in book (Other (popular science, discussion, etc.))
  • 30.
    Broström, Tor
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Leijonhufvud, Gustaf
    Gotland University, School of Culture, Energy and Environment.
    The Indoor Climate in Skokloster Castle2010In: Historical buildings as museums: Systems for climate control and heritage preservation / [ed] Davide Del Curto, Firenze: Nardini Editore , 2010, p. 84-93Conference paper (Refereed)
    Abstract [en]

    Skokloster castle is a heavy stone and brick building without any active climatization. It houses a large collection of artefacts shown in their historic environment without any showcases. The objective of this study is to analyse the indoor climate, make a risk assessment and to propose interventions to improve the indoor climate with respect to the long term preservation of the collection. Relative humidity and temperature have been monitored within the castle for more than one year. Air exchange in selected rooms has been measured quarterly using diffusive sampling. The indoor climate is characterized by extremely low temperatures and high relative humidity in the winter. Even though the building does reduce the effect of outdoor variations, the variations in the indoor climate are larger than one would prefer in a museum. The primary risks associated with the indoor climate are mould growth, mechanical damages and chemical degradation. The variations in RH can be reduced by enhancing the effective hygrothermal inertia of the building through a reduction of the air exchange. In order to substantially reduce the mould risk, conservation heating and/or dehumidification would be needed.

  • 31.
    Broström, Tor
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Nilsen, Lisa
    Energy Efficiency in Historic Buildings: Postprints from the Conference : Visby, February 9–11, 20112012Conference proceedings (editor) (Other academic)
    Abstract [en]

    Energy efficiency is an issue that brings the trade-off between aspects of use and preservation to a head. On the one hand, interventions for energy efficiency facilitate long-term use by reducing operating costs; on the other hand, the interventions may have both a physical and a visual impact on the cultural heritage value and the fabric of the building.

    In order to promote a sustainable use and preservation of historic buildings, The Swedish Energy Agency instituted a National Research Program for Energy Efficiency in HistoricBuildings. The first stage of the program ranfrom 2007 to 2010 with a total budget of around 4 million Euro. Additional funding was provided by the Church of Sweden and the NationalHeritage Board. There were fifteen projects involving some thirty researchers from different Swedish universities and research institutes.

    To mark the end of the first stage of the national research program the international conference Energy Efficiency in Historic Buildings was held in Visby in February 2011. Most of the projects within the program were presented at the conference and international key-note speakers were invited to each session, giving a total of 24 papers. More than one hundred participants, representing ten countries, participated in the conference.

  • 32.
    Broström, Tor
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Nilsson, Håkan
    WSP Environmental, Department of Building Physics.
    Climate Comfort Measurements in Swedish Churches Equipped with New Heating System2008In: Proceedings of the 7th International Thermal Manikin and Modeling Meeting, University of Coimbra , 2008Conference paper (Refereed)
    Abstract [en]

    Many church buildings in Sweden have problems with rising heating costs combined with deterioration of inventories as a consequence of an inappropriate indoor climate. Gotland University has in collaboration with Gotland's churches installed a new radiant heating system for churches. The developed system has floor heating and bench heating pads combined with radiant heaters hanging from above the bench rows. These new installations have now been evaluated with respect to thermal climate comfort. The results show that the clothing of course plays an important role even with help radiant heaters and bench heat pads. Persons on both sides of the instrument as well as the height of the heaters do seem to play a smaller role in this investigation. An important parameter to check is the risk for drought that clearly is dependent on of the construction of the church benches.

  • 33.
    Broström, Tor
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Nordström, Anders
    Historiska Hus, Umeå, Sweden.
    Climate Control in Churches in Northern Sweden2009In: Proceedings Cold Climate HVAC Sisimiut, Greenland, 16-19 March 2009, 2009Conference paper (Refereed)
    Abstract [en]

    In the extreme north of Sweden, the indoor climate and energy performance of 50 churches is being monitored in order to improve energy efficiency and to improve the indoor climate with respect to the preservation. The objective of the present paper is to investigate if and how both indoor climate and energy efficiency can be improved through better climate control. Three cases were chosen to study churches with no heating, permanent heating and intermittent heating. In each case the actual indoor climate was compared to climate criteria for preservation to determine the consequences in terms of climate control. The results show that there is a conflict between the climate criteria for preservation and the present use of the churches that cannot be resolved by technical solutions only. In order to come up with reasonable compromise research is needed on climate criteria and risk management at extremely low ranges of RH.

  • 34.
    Broström, Tor
    et al.
    Gotland University, School of Culture, Energy and Environment.
    Svanström, Karin
    Gotland University, School of Culture, Energy and Environment.
    Solar energy and cultural-heritage values2011In: World Renewable Energy Conference, Linköping, May 2011: Volume 8 (Low-Energy Architecture) / [ed] Moshfegh, Bahram, Linköping: Linköping University Electronic Press, 2011, p. 2034-2040Conference paper (Refereed)
    Abstract [en]

    The use of solar energy in a building of cultural-heritage value is an issue that brings the trade-off between aspects of use and preservation to a head. A sustainable use and preservation of historic buildings requires broad and long term compromises between social, economic and environmental aspects. The objective of the present paper is to present and discuss a decision framework for such compromises regarding the use of solar energy in historic buildings.

  • 35.
    Brunskog, Maria
    Gotland University, School of Culture, Energy and Environment.
    Energieffektivisering i byggnader av kulturhistoriskt intresse med avseende på kyrkor i Luleå stift2011Report (Other academic)
  • 36.
    Bylund Melin, Charlotta
    et al.
    Göteborgs universitet.
    Bjurman, Jonny
    Göteborgs universitet.
    Brunskog, Maria
    Gotland University, Department of Integrated Conservation.
    von Hofsten, Astrid
    Nationalmuseum.
    Painted wood as a climate indicator?: experiences from a condition survey of painted wooden panels and environmental monitoring in Läckö Castle, a dehumidified historic buildiing2010In: Multidisciplinary conservation: a holistic view for historic interiors joint interim-meeting of five ICOM-CC working groups, Rome 2010, Paris: International Council of Museums , 2010, , p. 12p. 1-12Conference paper (Other academic)
    Abstract [en]

    Läckö Castle is an historic building that has never been permanently heated but has been dehumidifiedsince the early 2000s to house museum collections. The purpose of the work was to evaluate thedehumidification performance and compare the climate with the state of preservation of wooden wallpaintings. Compiled climate recordings for different rooms in the castle from 1997 to 2009, before andduring dehumidification, were used and compared to the outside climate. The RH set point value of 70 % for dehumidification was not reached often, especially in winter with high outside RH. Wood painted witha linseed oil paint performed well, whereas paint containing resin was seriously damaged. It is concludedthat microclimatic differences in relation to dominating wind direction are important. The air exchangeof the building is very decisive for dehumidification efficiency.

  • 37.
    Bälter, Simon
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Kvick, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Försäkringsbolags kostnader för reparation av fuktskadade badrum2014Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this report is to compile and examine the cost of renovation of moisture-damaged bathrooms, to derive a target price. The target price can then be used by insurance companies to estimate the ultimate cost of future bathroom renovations.

           The method is based on the compilation and comparison of the cost of repairs of previous water damage in bathrooms. The calculations compiled based on repair estimates for different insurance losses from one of the leading insurance companies in Sweden.

           The result shows the average price per square meter of floor area for different sizes of bathrooms. The average price is the basis for the estimate of future renovation costs of bathrooms. The results further show that the bathroom finishes, area and the distance between the entrepreneur and the location of the renovation have great impact on the final repairing cost. The biggest impact on the final price is the bathroom finishes and area.

     

  • 38.
    Böör, Zsofia
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
    Sporrong, Clara
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
    Hand- och armvibrationer i byggbranschen: En studie av vilka faktorer som bidrar till uppkomsten av vibrationsskador2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    At today's construction sites, most of the work is carried out using hand-held and or hand-operated machines that create vibrations. Work with hand-held vibrating machines can result in damage to vessels, nerves and muscles, sometimes even on the skeleton, during continuous work. The effects of vibration damage can be powerful and in order to prevent these, work with vibrations needs to be considered and checked.

    The purpose of this thesis is to identify which factors contribute to the fact that vibration-induced injuries are so common at the construction sites today, despite the knowledge about the serious symptoms of the injury. By studying working methods, attitudes and behaviors and how the injury is prevented today, it is examined whether it is possible to reduce the occur-rence of vibration-induced injuries. The research begins with a literature study to obtain knowledge about vibration diseases and associated symptoms, as well as about the facilities and working methods that exist today to reduce vibrations at the construction sites. Further-more, a survey is conducted on how Skanska AB works with vibrations and interviews at some of Skanska Sverige AB's projects to clarify how the work against vibration injuries looks like in practice.

    The result of the thesis shows that work with reducing vibration is given some priority, but that it can be further improved. The employees have knowledge of the injury, but not enough to make demands on how developments can be made in the working environment. The working methods used are not optimal and there is resistance to the methods developed to reduce work with vibrations. During the interviews it emerges that many methods are mentioned in theory but that they are rarely used in practice. There are also deficiencies in the communica-tion between the different occupational groups regarding who is responsible for reducing the work with vibrating tools.

    The construction industry is developing in the work with reducing vibration, but there are also many parts of the industry that make the prevention work more difficult. The result shows signs of this and lack of time proves to be a great reason why the work with reducing vibrations is not prioritized. At the end of the report there are some recommendations given for further stud-ies to improve the preventive work. For instance, continued studies are recommended on how the difficulty with lack of time can be reduced and on how methods for reducing vibration can be more adaptable in practice.

  • 39.
    Carlsson, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
    Osäkerhet i energisimuleringar av flerbostadshus: Analys av fem nybyggnationer2012Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Since energy simulations are used to verify that projected residential buildings will reach the current energy requirements it is important that the results are reliable.This report investigates the extent of uncertainty in energy simulations, estimates the causes of the uncertainty and its economic and environmental consequences.

    The method used in this report is based on three validation methods; empirical validation, analytical validation and comparative validation. The analysis was carried out for five multi-family dwellings in Uppsala with installed meters for energy measurements. One of these objects, Klockarlunden, was studied in more detail than the others.

    The results show that the deviations are between 10 and 29% for the studied objects, which means that the uncertainty is estimated to be at least 29%. All simulations underestimate the buildings need of energy. The simulation for Klockarlunden can predict the energy consumption to be within the range of 46-98 kWh/m2year with 90% confidence level based on the current uncertainty. The range equals a standard deviation of 28% of the mean. The origin of the uncertainty for the studied objects was shown to be due to weak estimations of hot water consumption, ventilation flow rates, leakage and household electricity. The consequences of the difference between simulated and measured energy consumption can be translated to SEK 8.5 million and 4.5 thousand tons of carbon emissions over the estimated economic lifespan of the buildings.

  • 40.
    Chamoun, Afram
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Art History, Conservation.
    Tudt, Daniel
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Art History, Conservation.
    Nordströms museum i Norrtälje: Förslag till byggnadstekniska åtgärder för vind och tak2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Nordströms museum is the heritage of Torsten Nordström. During his lifetime Torsten acquired a large variety of collectables that can be found in his museum. Due to a construction project in the neighborhood the foundation of Nordströms museum got disturbed. This led to the chimney of the building sinking, which gave rise to new problems for the construction. Today water is leaking through the plate roof and the building technology is outdated which has contributed to moisture damage in the attic. If nothing is to be done the collection is at risk to be destroyed.

     

    Prior to this written report relevant literature has been studied and two inspections has been carried out. Because of insufficient documentation regarding the construction of the building assumptions had to be made.

     

    With a curved roof full of cavities, rainwater is leaking through to underlying and sensitive parts of the building. The attic is without heating and its walls are missing vapor barriers and isolation. In combination all the above can cause major damage to the building.

     

    This study has resulted in a list of suggested actions against the moisture problem of the roof and is meant to be used as a basis for future decision regarding an eventual renovation of Nordströms museum.

  • 41.
    Cheung, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Tillämpning och simulering av naturlig ventilation: Potential för utnyttjande i kontorsrum2014Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Mechanical ventilation is the most common type of

    ventilation in newly constructed office buildings. There

    has been an interest to utilize natural ventilation

    instead of mechanical ventilation among architects and

    HVAC consultants in recent years. This is due to the

    size of mechanical ventilation systems, which are

    space consuming. The mechanical ventilation system is

    also complex and requires maintenance. Furthermore,

    the fan uses a considerable amount of energy. Natural

    ventilation is an alternative not affecting the rentable

    floor space. The basic idea of natural ventilation is to

    use a technique where natural forces such as wind and

    thermal gradients fully handle the ventilation.

    The software program IDA ICE was used to simulate

    the natural ventilation by advanced window control in

    offices and to investigate if natural ventilation is a

    good option to conventional systems regarding indoor

    climate and energy use. The indoor temperature and

    the concentration of carbon dioxide control the

    window opening. A CAC (Clean Air Control)- sensor

    was also used instead of a traditional CO2-sensor,

    which is a sensor that regulates the airflow according

    to the level of air pollution.

    The results show that natural ventilation with advanced

    window control cannot always achieve the regulatory

    requirements for the highest carbon dioxide content of

    1000 ppm, since the airflow is not sufficient. On these

    occasions a fan is required to provide a good indoor

    climate. An interesting observation is that the energy

    use for heating is only 38% larger for the office rooms

    with natural ventilation compared with mechanically

    ventilated offices. Even though the heat energy are

    released to the outdoor environment and not

    recovered in the naturally ventilated room.

  • 42.
    Danielsson, Per
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Helander, Fredrik
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Vision Nollenergihus: Energiförsörjning av passivhus med sol- och vindenergi2013Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Climate change is the modern society’s common issue. The developed countries are

    consuming more than what is sustainable, and the climate change due to the use of

    fossil fuels can be seen clearly. EU has specified goals, in order to stop further

    damage, which demand that every member state have to reduce its energy

    consumption by 20 % before 2020 and 50 % before 2050, relative to 1995.

    The Swedish government uses a number of instruments to encourage reduction in the

    usage of energy, but every individual has to contribute to reach the goals.

    With increasing energy price the cost of living is going up. A lot of people are looking

    for ways to save energy and not be affected as much by the increasing price.

    Investments for insulation, replacement of windows and replacing old heating system

    for a new efficient heat pump is getting more and more common.

    This thesis is about investigating the possibilities in becoming independent from buying

    energy for households. The thesis describes ways to use and store the abundant solar

    energy in the summer and transfer it to the winter.

    By building a neighborhood with five so called passive houses and having common

    installations, some costs of the expensive investment can be divided on more than

    one user. Then if the price of energy keeps on rising, it is possible to get a lower living

    cost compared to conventional housing developed according to the Swedish BBR

    demands. This system will become even more profitable when the skills and

    technology is perfected.

  • 43.
    Duvensjö, Erica
    Gotland University, School of Culture, Energy and Environment.
    Norrbottensgården: dess arkitektoniska beskaffenhet i Pitebygden2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Two reports written by Bertil Waldén were published in the yearbook of “Norrbottens hembygdsförening” in 1926-27. He described certain types of dwelling houses: one with two rooms and a bigger one called framkammarstuga, and the goods used in farmer’s homes in the 19th and the beginning of the 20th century. Since then this kind of farm, the so called Norrbottensgård, has not been an object of further investigation. 

    This essay will therefore portray a selection of residential homes in the community of Piteå. It deals with how the use of these homes has altered since the investigations of Waldén, also which variations of the two classical housing types are represented. My method has been field research and interviews, except for using previous research.

    The most common Norrbotten farm is a two-room house or a front-room house (framkammarstuga). The two-room houses were for the not so well-to-do population and the front-room houses were for the wealthy farmers who wanted to accentuate their wealth. Several important factors lead to the shape of the classical homes. The length of the timber shaped the house. The frame made the house relatively easy to extend further. The wealth that the farmers collected in the age of the industrial revolution was also an important factor influencing the shape and size of the house. When a farmer sold his forest to lumber merchants they used part of the money to convert the house by adding extensions and an attic to the already existing house.

    In Piteå there are some houses which on the outside look like a Norrbotten residential home, with small windows in the attic, a red facade, and an elongated, rectangular frame, but they are different on the inside when compared to the classical houses.

    This essay illustrates a six-room Norrbotten dwelling, and a variety of the front-room houses where the end chambers are placed alongside the living room instead of in its extension. This variety reflects the creativity of the farmers and the perceived need to have an individually shaped design of the dwelling. By adding individual touches to the building it gained a unique layout, where needs and shape reflected the constructor´s life and social status.

    The history of Norrbotten farms is long and naturally they have been renovated and modernized. They are no longer connected with farming, but they ensure the classical attributes of the exterior, the wooden floors in the interior and the typical pitevalvet (Pite vault). 

  • 44.
    Edenvind, Rickard
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Eriksson, Amanda
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Fuktskador i bostadskök: En undersökning om fuktskador i kök och hur dessa kan förebyggas vid nyproduktion2011Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Moisture damage in kitchens is an area that many people believe to be irrelevant andnot a subject to concern, however the problems encountered might be larger thananticipated.The purpose of this essay is to get a view of how problematic moisture damagecurrently is as well as what can be done to prevent damage during the constructionand building of new housing.Statistics regarding moisture damage as well as several tools for damage preventionhave been studied and investigated. Industrial regulations have been reviewed tounderstand the requirements construction companies must legally follow during theconstruction and building of new kitchens. Home manufacturers and largerentrepreneurs have been contacted in order to get their point of view regarding theproblems with moisture damages in kitchens.The knowledge of moisture safe constructions is prevalent by home manufacturers,insurance companies and entrepreneurs. Despite this knowledge, the constructioncompanies predominately follow the industries regulations, which normally onlyimplement the minimum requirements.In order to get construction companies to design and build kitchens with increasedmoisture security, stricter industrial regulations might be needed to be implemented.Unlike bathrooms and laundry rooms, kitchens are not defined as a ”wet room” andthe regulations for the construction of kitchens are more lenient.It is difficult to detect water leaks in an early state and the moisture damage is usuallyextensive before it is discovered and repaired if the kitchen lacks moisture securedconstruction and water security. The most common cause of moisture damage is dueto pipe failure and, most likely in the cold water pipes where corrosion is the biggestproblem.

  • 45.
    Edlinger, Robert
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Svansbo, Karl
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Axial- och gradientkrympning hos golv på mark enligt Eurokod 2: Sprickbredders beroende av betongkvalité, tvångseffekter och armeringshalt2012Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Abstract

    Concrete foundation slabs are usually exposed to unilateral drying during the curing process. The unilateral drying causes an axial shrinkage and a concave curvature of the construction. The curvature results from the fact that the upper part of the slab is drying and shrinking faster than the lower part. This is called gradient shrinkage.

    A problem occurs when the slab is considered fully restrained by adjoining structural parts. The deformations caused by axial contraction due to the constant part of the shrinkage and the curvature caused by gradient shrinkage of the slab are then prevented by the fact that the slab is fully restrained. When the shrinkage and the curvature are prevented, constraints occur in terms of an axial force and a bending moment. These constraints cause cracking in the upper part of the slab. These cracks can cause inconveniences for the user of the slab and the cracks should therefore be minimized.

    It is important to determine the precise magnitude of the constraints so that sufficient amount of reinforcement can be applied into the concrete and the crack widths can be reduced.

    The construction consultancy company WSP has an interest in structural design methods for reducing the risk for concrete cracking through establishing engineering guidelines for the structural design of foundation slabs which are exposed to axial and gradient shrinkage.

    The result in this report shows the magnitude of the constraints for slabs of varying thickness and molded with different types of concrete. The constraints are later used to determine the crack widths. Two different reinforcement standards, both in compliance with the minimum requirements of Eurocode 2, are included in the study.

    A conclusion based on the results shows that the amount of reinforcement can be reduced in foundation slabs up to 300 millimeters thickness without significant impact on the crack widths.

  • 46.
    El Mourabit, Samir
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Forsberg, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    BRANDDIMENSIONERING AV STÅL: En jämförelse av dimensioneringsmetoder2014Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    When the construction industry phased out the earlier national construction standards a few years ago and replaced them with the European standards, the rules for fire safety changed. The new design process is complex and not simple to get a full picture of. For that purpose this thesis is written for Sweco Structures AB.

    The main part of this thesis comprises of descriptions and explanations of the existing design methodologies. To better understand the methods in Eurocode, the first chapter contains basic theory of how fires behave and how steel responds to higher temperatures. The following chapters address the simplified calculation methods and their equations. The report also includes a case study of a steel framed industrial building where a critical diagonal was analyzed.

    The analysis showed that the method called critical temperature method is not applicable for components where instability is taken into account. Those components should instead be calculated using the equations given in Eurocode. Therefore the critical temperature method has a very limited use. The analysis also showed that the cost of increasing the dimension of the diagonal was about the same as the cost of coating it with fire resisting paint, but this is very dependent on the situation. The report concludes with discussion and comparison of results.

  • 47.
    Elfström, Johanna
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Singh, Ayushi
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Prefabricerat trähusbyggande med moduler: För- och nackdelar samt förslag på vidareutveckling2013Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The construction industry can contribute to a healthier sustainable community. A development that is going on right now is by using more prefabricated volume- and plan elements on the construction sites. Building with this method not only provides a benefit to the environment, but also reduces production rates by taking up to 80 percent less time to build. By building in this way it will be easier to recycle and keep all the material that otherwise would go to waste. Also by building inside a protected environment, the material retains its good quality.

    This report will take forward proposals on further development of prefabricated volume element of wood, by first presenting this construction methods advantages and disadvantages.

  • 48.
    Elvingson, Fredrik
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
    Vindar med begränsad ventilation - Fukttekniska undersökningar2016Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Tougher fire requirements and the desire to make

    simpler designs have enabled construction companies

    to go from the traditional well-ventilated attic to attic

    with limited ventilation. Theoretically limited ventilated

    winds should perform well. The problem you see if there

    is construction moisture or external moisture sources.

    Problems may occur when the small ventilation is not

    able to remove moisture to the extent necessary.

    Heavier constructions usually have a large amount of

    construction moisture in the attic floor, which can be

    transferred to the attic space. Heavier structures with

    limited ventilated attics have not been studied

    previously.

    AK Consulting was commissioned to evaluate five attics

    to a construction company erected in 2014 and 2015.

    Former investigations showed that there was a risk

    initially with respect to the excess moisture from

    building moisture. This study was carried out with

    theoretical calculations on a model of an existing attic

    with moisture problems.

    The present thesis was commissioned by AK

    Consulting. It evaluated the data and reports from the

    five attics and assesses them with the help of WUFI BIO

    and made theoretical calculations in WUFI.

    The study shows that attics with limited ventilations

    work well initially and that the ventilation of the attic

    does not lead to drier attics. Longer measurement

    periods are required in order to see how the wind works

    in the long term and in different outdoor climates. It is

    difficult to determine the effect of initial

    dehumidification of the winds. The attics have little or

    no excess moisture over the measurement period.

    The recommendations are to dehumidify attics initially

    until further studies have been done on similar

    structures. It is also important to continue monitoring

    the attics in this study to follow up how they work in the

    long term and during years with different climatic

    conditions.

  • 49.
    Engvall, Karin
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Occupational and Environmental Medicine.
    Lampa, Erik
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Occupational and Environmental Medicine.
    Levin, Per
    Wickman, Per
    Öfverholm, Egil
    Interaction between building design, management, household and individual factors in relation to energy use for space heating in apartment buildings2014In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 81, p. 457-465Article in journal (Refereed)
    Abstract [en]

    In Stockholm, 472 multi-family buildings with 7554 dwellings has been selected by stratified random sampling. Information about building characteristics and property management was gathered from each property owners. Energy use for space heating was collected from the utility company. Perceived thermal comfort, household and personal factors were assessed by a standardized self-administered questionnaire, answered by one adult person in each dwelling, and a proportion of each factor was calculated for each building. Statistical analysis was performed by multiple linear regression models with control for relevant factors all at the same time in the model. Energy use for heating was significantly related to the building age, type of building and ventilation, length of time since the last heating adjustment, ownership form, proportion of females, and proportion of occupants expressing thermal discomfort. How beneficial energy efficiency measures will be may depend on the relationship between energy use and factors related to the building and the property maintenance together with household and personal factors, as all these factors interact with each other. The results show that greater focus should be on real estate management and maintenance and also a need for research with a gender perspective on energy use for space heating.

  • 50.
    Eriksson, Erik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Ramström, Carl
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Tillbudsrapportering: Skillnaden mellan två arbetschefsgrupper2011Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In autumn 2010, the Division of Civil Engineering at the Swedish building contractorPEAB made a campaign to increase the number of reported incidents. Informationwas sent to the branch manager who was responsible to enlighten the employees onthe establishment. The goal of PEAB Division of Civil Engineering is to have at least 10reported incidents per accident that generate more than 8 hours absence. Therefore,it is important that the employees understand how the report system for incidentsworks. The number of reported incidents differs between regions. In order toimprove the understanding of why the numbers differ, PEAB Division of CivilEngineering wants to look into the region with the most reported incidents and theregion with the fewest. Through qualitative interviews, the employee’s knowledge andattitude to reporting incidents were reviewed.The study shows large differences in attitude and routines between the two regions.The biggest differences are due to the commitment of the management and how theinformation about the reporting system of incidents reaches their subcontractors. It isshown that the contractors find it confusing what incidents are to be report.In this report we give recommendations how to get an increased number of incidentsreported and later reach up to the goals PEAB Division of Civil Engineering of animproved work environment.

1234 1 - 50 of 151
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf