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  • 201.
    Pourghazian, Hanif
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Höglund, Torsten
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap.
    Sheet metal profiles restrained by insulation blocks2008Inngår i: Thin-walled structures, ISSN 0263-8231, E-ISSN 1879-3223Artikkel i tidsskrift (Annet vitenskapelig)
  • 202.
    Pourghazian, Hanif
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Molinari, Marco
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Energy efficient design of buildings: building envelope performance and thermal stability2008Inngår i: Journal of Building Physics, ISSN 1744-2591, E-ISSN 1744-2583Artikkel i tidsskrift (Annet vitenskapelig)
  • 203.
    Pramlid, Elin
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Arehög, Catharina
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    The Green Canteen: A Sustainable Structure in Zanzibar2015Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    This Master of Science Thesis within Building Technology covers the construction of anecological, sustainable and self-sufficient school canteen for a SOS Children’s Village inZanzibar, Tanzania. The project is called The Green Canteen and is led by Architects withoutBorders in Sweden. The project is an already existing project that is derived from anincreased awareness of unhealthy and innutritious food creating obesity and cardiovasculardiseases in developing countries. The new canteen will accommodate more students thanthe existing one but will also illustrate, by its design and systems, the food’s life cycle andrecycling of natural resources. During the spring of 2015 a Minor Field Study was performedby Catharina Arehög and Elin Pramlid in Zanzibar to evaluate some of the structural issuesassociated with the architect's design. Local building technology, architecture and buildingmaterials were studied in Zanzibar and the new canteen was evaluated in terms ofecological, social and economic sustainability. Finally, a structural analysis was performedwith the aim to improve the building’s design and stability using sustainable buildingmaterials.

  • 204.
    Pramsten, Ebba
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Hedlund, Martin
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Ekonomisk analys av vakuumisoleringspaneler i ytterväggar2009Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
  • 205.
    Prandin, Mosè
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Exergy Analysis at the Community Level: matching supply and demand of heat and electricity in residential buildings2010Independent thesis Advanced level (professional degree), 30 poäng / 45 hpOppgave
    Abstract [en]

    Most of the energy required by residential buildings is for low temperature heat. Often this

    demand is met by the use of high quality energy sources such as fossil fuels and electricity.

    The energy analysis alone does not take into account the quality of energy and so it hides the

    real potential for the so-called energy savings. Thus the concept of exergy must be involved.

    In particular the low-exergy approach shows that the energy with low exergy level has to be

    supplied with energy with similar exergy content.

    Consequently, the problem is shifted to find energy sources suitable for this purpose. The

    electricity can be exploited with low exergy losses with high-COP heat pumps. Instead the

    use of fossil fuels for thermal purposes should be avoided.

    One of the possibilities is the energy cascade. In this solution the energy flow is used several

    times, despite its quality decreases with each step, before being discharged into the

    environment. Thus the use of the district heating from cogeneration for the space heating

    seems to be an interesting choice. The issues connected to the cogeneration exploitation force

    to shift the boundary layers of the analysis from the building to the community level.

    In this work different solutions to meet the electricity and heat demands of a community of

    houses have been compared. The aim is to show that the results obtained from the low-ex

    approach allow an effective reduction of fuel consumption through a more rational use of the

    resources. The comparison was addressed initially in steady-state case and then with the use

    of the software HOMER also for the dynamic case. To achieve reliable results, this required

    that the annual profiles for thermal and electrical demand of the reference community are

    modelled to represent the actual loads as closely as possible. Finally, for each case taken into

    account, the total consumption, the energy and the exergy efficiencies have been calculated.

  • 206.
    Prando, Dario
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Global sensitivity analysis of the building energy performance and correlation assessment of the design parameters2011Independent thesis Advanced level (professional degree), 30 poäng / 45 hpOppgave
    Abstract [en]

    The world’s energy use in buildings (residential and commercial) accounts for around

    40% of the worldwide energy consumption, and space heating is the responsible for half

    of the energy need in the building sector. In Europe, only a small share (less than 10%) of

    existing buildings was built after 1990. Most of the building stock does not satisfy the

    recent energy technical standards; in addition there is a very low trend to construct new

    buildings in the last years.

    Renovation of the existing buildings is a feasible option to reduce the energy need in

    Europe, but finding the optimum solutions for a renovation is not a simple task. Each

    design parameter differently influences the final energy need of buildings and,

    furthermore, the different variables are differently correlated each other. Building

    refurbishment will benefit from a tool for the selection of the best measures in term of

    energy need.

    This work, through a global sensitivity analysis, aims at determining the contribution of

    the design parameters to the building energy demand and the correlation between the

    different variables. The considered parameters are related to the improvement of the

    thermal transmittance of both the opaque envelope and the windows, the solar

    transmittance of the glazing surfaces, the window size, the thermal inertia of the internal

    walls and the external sunshades for windows. Several dynamic simulations have been

    performed varying the design parameters from different starting conditions. Finally, due

    to the large number of cases elaborated, an inferential statistical analysis has been

    performed in order to identify the predominant factors and the correlation between the

    design parameters in a global context.

  • 207.
    Rahimi, Kaj
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Hassani, Sasha
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Energibesparing i flerbostadshus2010Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
  • 208.
    Ramqvist, Therese
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Nilsson, Sandra
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Planering av ett småhus: Spara energi med solfångare och tilläggsisolering2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
  • 209.
    Reynisson, Hannes
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Energy Performance of Dynamic Windows in Different Climates2015Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The European Union (EU) has expressed determination of reducing its energy consumption and the EU’s 2010 Energy Performance of Buildings Directive states that all new buildings must be nearly zero energy by the end of the year 2020.

    Dynamic or “smart” windows have been shown to be able to reduce HVAC energy consumption, lighting energy and peek cooling loads in hot climates in the US but it is difficult to find any work concerned with colder climates. This study is intended to capture the performance of dynamic windows in a variety of European climates to explore potential contributions to reaching the EU’s energy goals.

    The building energy simulations of this study have been conducted in IDA ICE for an office section with a large window. Three model variants are compared: without a window shading, with an external window blind and with a dynamic window. This comparison is repeated for six different locations; Kiruna, Reykjavik, Stockholm, Copenhagen, Paris and Madrid.

    The results of this study show that the dynamic window can reduce the total consumed energy for lighting, heating and cooling in the range of 10%-30% more than the external blind, depending on location. The reduction is 50%-75% when compared to the unshaded window. This level of performance can move Europe a step closer to zero energy buildings.

  • 210.
    Rinaldi, Nicola
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Thermal Mass, Night Cooling and Hollow Core Ventilation System as Energy Saving Strategies in Buildings2009Independent thesis Advanced level (degree of Master (One Year)), 20 poäng / 30 hpOppgave
  • 211.
    Ronnegren, Ulf
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Peabs modulbalkonger - Design, funktion och projektering2005Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
  • 212.
    Routsolias, Panagiotis
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Energy-efficient design and application of geothermal energy in buildings of areas of protected cultural heritage: Case study Mani, Greece2006Independent thesis Advanced level (degree of Master (One Year)), 20 poäng / 30 hpOppgave
  • 213.
    Rydström, Christoffer
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Theander, Mikael
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Energideklaration för äldre flerbostadshus - metodutveckling2007Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
  • 214.
    Rydén, Anna
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Torp, Emelie
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Val av golvmaterial i sjukhusmiljöer: ur ändamålsenlig- ekonomisk- och miljösynpunkt2001Independent thesis Advanced level (degree of Master (One Year)), 20 poäng / 30 hpOppgave
  • 215.
    Saidzadeh, Millad
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Akhondi, Mehdi
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Praktisk & teoretisk tillämpning av Aerogel i byggnader2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
  • 216.
    Salehzadeh, Kourosh
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap.
    Hansson, Daniel
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Passivhusets utmaning: En undersökning i hur stora fönster ett passivhus får ha med avseende på kravspecifikationen från FEBY2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
  • 217.
    SAMADILASHKARIANI, ERFAN
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Supplementary buildings to fixed price - in support of undergoing project in SABO Case Study : Svenska Bostäder Laundry room in HusbyKompletteringsbyggnader till fast pris - Till stöd för projekt inom SABOFallstudie : Svenska Bostäder Tvåttstuga i Husby2018Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Översikt

    Denna studie stöder ett projekt som genomförs av SABO. Det handlar om att kunna handla uppkompletterande byggnader till ett fast pris. Exempel på tilläggsbyggnader (eller kompletterandebyggnader) är tvättstugor, rum för selektiv avfallshantering, lagring, cykelförvaring,samlingsrum mm. Syftet är att göra en ny upphandling för dessa typer av byggnader så att dekan beställas till fast pris från en katalog . SABO har gjort liknande projekt för färdigaflerbostadshus som är välkända i Sverige som KOMBOHUS. Min uppgift var att fokusera påtvättstugor. Utgångpunkten var en tvättstuga som blivit byggd i i HUSBY centrum av Svenskabostäder (SB). I arbetet tillämpades metoder för att testa hur energiprestanda påverkades avolika förändringar. Min studie började med att ta fram detaljerade arkitektoniska data omtvättstugan genom eget besök. Efter att ha träffat projektkoordinatorn i Svenska Bostäderfrågade jag honom om första visioner som bestämde den aktuella utformningen.. Metoden idetta arbete är att utvärdera och manipulera variablerna som kännetecknar byggnaden medhjälp av på programvarusimulering och beräkning. Dessa variabler har viktiga roller itvättstugans energiprestanda. De har också stor inverkan på byggkostnaderna. Med hjälp avVirtual Reality-teknik har jag kopplat mina utvärderingar till en av de viktigaste visionerna för SBsom är trygghet. Resultatet av denna studie visade att det finns begränsningar i hurenergieffektiv som byggnaden kan göras. Studien visar det faktum klart för projektgruppen attinte alla energibesparande åtgärder är bra investering. Så ger arbetet tydligare idéer för denkommande upphandlingsprocessen för kompletterande byggnader.

  • 218.
    Sanchez Loarte, José
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap.
    Landin, Ebba
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Grön upphandling, ett sätt att få mer miljöfokus i byggandet2011Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
  • 219.
    Sellerholm, Paul
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Invallningsmodeller för petroleumcisterner2010Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
  • 220.
    Shaikh, Ishrat
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Virtual Team Management in Construction Projects and the role of BIM: A study of challenges faced by construction projects in managing virtual teams distributed globally2018Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
  • 221.
    Shawkat, Salman
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Hussain, Ragheed
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Concrete Cracks in Swimming Pool Basins2017Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Majority of the swimming facilities in Sweden are facing some form of renovation or total substitution. The report analyses cracks in two different public bath facilities namely Eriksdalsbadet and Enskedehallen. The text also discusses different solution strategies for cracks in concrete. The aim with this thesis is to discuss how facility managers can extend the service life of these facilities by taking measures against the crack damages. Since renovation can be expensive, it is important to study cracks early on when they appear. This thesis also emphasizes on how important it is to add resources for preventing cracks, already during casting. Resources should also be added for maintaining the basins, managing repair methods for all types of cracking problems. This thesis is more of a generalized study for cracks in concrete, however it concludes with taking a more specific approach by discussing the problems in swimming basins. Causes of cracks, different types of cracks and evolution of cracks are studied and discussed with emphasis on the structural damages that can occur. With pictures taken and analyzed from the two facilities and a visitation with a experienced concrete investigator from CBI, this thesis concludes with a decision to immediately take repair actions against cracks that are shown in the report. The report discusses two perspectives, one where the authors of the thesis discusses solutions derived from information given in the report, and the other perspective is derived from guided inspection with consultant from CBI. 

  • 222.
    Silva, Vera
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Cost-effective Building Constructions – Carbon Fibres Reinforcement2003Independent thesis Advanced level (degree of Master (One Year)), 20 poäng / 30 hpOppgave
  • 223.
    Simonsson, Cecilia
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Terrace roof constructions2001Independent thesis Advanced level (degree of Master (One Year)), 20 poäng / 30 hpOppgave
  • 224.
    Somp, Martin
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Hagman, Peter
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Flyttbara och flexibla byggnader2004Independent thesis Advanced level (degree of Master (One Year)), 20 poäng / 30 hpOppgave
  • 225.
    Spurná, Martina
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Low-Energy and Passive Buildings Economics of New Technologies2011Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    The thesis is concerned with the theme of energy savings in the Building industry. It

    describes passive house development in detail with a focus on the construction part

    of buildings with low energy consumption.

    At first, there is an overview of the actual situation concerning the new European

    Union’s restrictions and a basic classification of energy efficient buildings is

    introduced. Further, construction compositions in two energy standards are

    designed for a few selected construction systems suitable for a passive house. They

    are evaluated from different points of view and compared to each other. Finally, an

    estimate of the passive house value is given as well as return of extra investments

    with regards to energy price increase.

    Key words

    The thesis is concerned with the theme of energy savings in the Building industry. It

    describes passive house development in detail with a focus on the construction part

    of buildings with low energy consumption.

    At first, there is an overview of the actual situation concerning the new European

    Union’s restrictions and a basic classification of energy efficient buildings is

    introduced. Further, construction compositions in two energy standards are

    designed for a few selected construction systems suitable for a passive house. They

    are evaluated from different points of view and compared to each other. Finally, an

    estimate of the passive house value is given as well as return of extra investments

    with regards to energy price increase.

    Key words

    The thesis is concerned with the theme of energy savings in the Building industry. It

    describes passive house development in detail with a focus on the construction part

    of buildings with low energy consumption.

    At first, there is an overview of the actual situation concerning the new European

    Union’s restrictions and a basic classification of energy efficient buildings is

    introduced. Further, construction compositions in two energy standards are

    designed for a few selected construction systems suitable for a passive house. They

    are evaluated from different points of view and compared to each other. Finally, an

    estimate of the passive house value is given as well as return of extra investments

    with regards to energy price increase.

     

  • 226.
    Stenberg, Karl
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Hagengran, Per
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Orsaker till differenser mellan beräknad och faktisk energianvändning i nyproducerade flerbostadshus2005Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
  • 227.
    Stenström, Elin
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Uhrus, Maria
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Moderna Museet, en byggnad med speciella klimatkrav – Analys av risk för kondens i takkonstruktionen2003Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
  • 228.
    Surell, Andreas
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Jingstål, Pontus
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Solen som energikälla i småhus2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
  • 229.
    Suzuki, Jesper
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Lindblad, Hannes
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Gröna tak: En undersökande studie i takbeklädnadsalternativ för småhus i södra Sverige2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
  • 230.
    Svensson, Daniel
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Dimensionering av ett småskaligt säsongsvärmelager till uppvärmning av ett växthus2016Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Detta examensarbete utreder om det är möjligt att värma upp en planerad växthusutbyggnad av en 1,5-plans villa i Skåre utanför Karlstad. Uppvärmningen av växthuset ska ske enbart med värme från ett säsongsvärmelager, i form av ett markvärmelager. Värmelagret ska värmas upp med hjälp av solfångare som placeras på husets tak. Växthuset värms upp genom vattenburen golvvärme. Växthuset ska värmas upp under vintern och ska klara av att hålla 5 °C med detta värmesystem. Uppdraget blir att dimensionera värmelagret efter det värmebehov växthuset har och den effekt golvvärmen kräver.

    Värmebehovet för växthuset simuleras i IDA ICE där även vilken effekt som krävs av golvvärmen simuleras fram. De temperaturer som vätskan i golvvärmen behöver hålla beräknas i programmet Phoenix från Uponor. Värmelagret simuleras i COMSOL Multiphysics. Innan värmelagret kan simuleras beräknas det lokala värmemotståndet mellan kollektorslangen och omgivande mark i lagret. Detta för att veta vilken temperatur som säsongsvärmelagret behöver hålla. Det lokala värmemotståndet beräknas enligt de metoder som presenteras i Markvärme – En handbok om termiska analyser del II. Värmeproduktionen av solfångare beräknas enligt Björn Karlsson formel.

    Resultatet blir att det krävs en värmeproduktion på 12 150 kWh av solfångare, 30 m2 solfångare, för att ladda värmelagret. Jorden i marken byts ut mot lera för att värmelagret ska klara av att hålla tillräckligt hög temperatur under vintern för att värma växthuset. Simuleringarna visar att det är två stycken lager som klarar hålla tillräckligt hög temperatur för att golvvärmen ska kunna ge den värmeeffekt som krävs.

    Säsongsvärmelagret klarar att värma växthuset under vintern med golvvärme. Systemet blir dock relativt dyrt, vilket gör att projektet är svårt att försvara rent ekonomiskt.

  • 231.
    Söderkvist, Lina
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Dégeus, Malin
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Energikartläggning i Sundbybergs stad2007Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
  • 232.
    Tadayon Najafabadi, Davood
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Methods of survey for technical evaluation and planning of renovation strategies in residential building properties: Case Study, Tyresö municipality (Ekbacken)2018Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The thesis is an outcome of a collaborative work between the author and the renovation team of Modexa AB on project of housing renovation of Tyresö municipality ( Ekbacken ). During this thesis we tried to analyse the ongoing process of renovation in Stockholm and try to provide a solution which helps to improve the data gathering and analysis by production of the BIM model. Further studies to provide further details about the possible outcomes of the BIM model and integration with other software for energy studies, project management and building management had been done.

  • 233. Tenpierik, Martin
    et al.
    Cauberg, Johannes
    Thorsell, Thomas
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Integrating vacuum insulation panels in building constructions: an integral perspective2007Inngår i: Journal of Construction Innovation, ISSN 1471-4175, Vol. 7, nr 1, s. 38-53Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose – Although vacuum insulation panels (VIPs) are thermal insulators that combine high thermal performance with limited thickness, application in the building sector is still rare due to lack of scientific knowledge on the behaviour of these panels applied in building constructions.This paper, therefore, seeks to give an overview of the requirements for and the behaviour of VIPs integrated into building components and constructions. Moreover, the interaction between different requirements on and properties of these integrated components are discussed in detail, since a desired high quality of the finished product demands an integral approach regarding all properties and requirements, especially during the design phase. Therefore, the importance of an integral design approach to application of VIPs is shown and emphasized in this paper. Design/methodology/approach – To achieve this objective, the legally and technically required properties of VIPs and especially their interrelationships have been studied, resulting in a relationship diagram. Based on these investigations of thermal- , service life- and structural-properties have been selected to be studied more elaborately using experimental set-up for structural testing and simulation software for thermal and hygrothermal testing. Findings – Two relationships between requirements or properties were found to be of principal importance for the design of fac¸ade components in which VIPs are integrated. First, thermal performance requirements strongly interact with structural performance, principally through the edge spacer of this fac¸ade component. A high thermal performance requires minimization of the thermal edge effect, in most cases reducing the structural performance of the entire panel. Second, an important relationship between thermal performance and service life has been recognised. The operating phenomenon mainly governing this interaction is thermal conductivity aging. Originality/value – Most research in the field of vacuum insulation until now has been directed towards gaining knowledge on specific properties of the product, especially on thermal and hygrothermal properties. The relationships and interactions between these properties and the structural behaviour, however, have been neglected. This paper, therefore, addresses the need for an integral design (and study) approach for the application of VIPs in architectural constructions.

  • 234.
    Thorsell, Thomas
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    A hybrid model for diffusion through barrier films with multiple coatings2010Inngår i: Journal of Building Physics, ISSN 1744-2591, Vol. 34, nr 4, s. 351-381Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The amount of gas that penetrates the barrier of a vacuum insulation panels is directly linked to the service life of that panel. Therefore, to model and predict vacuum insulation panel service life, it is necessary to model the diffusion through its barriers. Best barriers on the market today are composites of multiple polymer layers with two or more inorganic coatings. It is accepted that the main part of diffusion, in such films, takes place through defects in the coating layers, but there are only a limited number of numerical models for this geometry with more than one coating. In this article, a hybrid model is presented that models gas permeation through film geometry with two coatings on a polymer substrate. Numerical calculations are combined with analytical ones to create a model that does take individual defect sizes as well as actual defect positions into account. Resulting oxygen transmission values calculated with this model have been compared to available manufacturer data with good agreement.

  • 235.
    Thorsell, Thomas
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Advances in Thermal Insulation: Vacuum Insulation Panels and Thermal Efficiency to Reduce Energy Usage in Buildings2012Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    We are coming to realize that there is an urgent need to reduce energy usage in buildings and it has to be done in a sustainable way. This thesis focuses on the performance of the building envelope; more precisely thermal performance of walls and super insulation material in the form of vacuum insulation. However, the building envelope is just one part of the whole building system, and super insulators have one major flaw: they are easily adversely affected by other problems in the built environment. 

    Vacuum Insulation Panels are one fresh addition to the arsenal of insulation materials available to the building industry. They are composite material with a core and an enclosure which, as a composite, can reach thermal conductivities as low as 0.004 W/(mK). However, the exceptional performance relies on the barrier material preventing gas permeation, maintaining a near vacuum into the core and a minimized thermal bridge effect from the wrapping of barrier material round the edge of a panel.

    A serpentine edge is proposed to decrease the heat loss at the edge. Modeling and testing shows a reduction of 60% if a reasonable serpentine edge is used. A diffusion model of permeation through multilayered barrier films with metallization coatings was developed to predict ultimate service life. The model combines numerical calculations with analytical field theory allowing for more precise determination than current models. The results using the proposed model indicate that it is possible to manufacture panels with lifetimes exceeding 50 years with existing manufacturing.

    Switching from the component scale to the building scale; an approach of integrated testing and modeling is proposed. Four wall types have been tested in a large range of environments with the aim to assess the hygrothermal nature and significance of thermal bridges and air leakages. The test procedure was also examined as a means for a more representative performance indicator than R-value (in USA). The procedure incorporates specific steps exposing the wall to different climate conditions, ranging from cold and dry to hot and humid, with and without a pressure gradient. This study showed that air infiltration alone might decrease the thermal resistance of a residential wall by 15%, more for industrial walls.

    Results from the research underpin a discussion concerning the importance of a holistic approach to building design if we are to meet the challenge of energy savings and sustainability. Thermal insulation efficiency is a main concept used throughout, and since it measures utilization it is a partial measure of sustainability. It is therefore proposed as a necessary design parameter in addition to a performance indicator when designing building envelopes. The thermal insulation efficiency ranges from below 50% for a wood stud wall poorly designed with incorporated VIP, while an optimized design with VIP placed in an uninterrupted external layer shows an efficiency of 99%, almost perfect. Thermal insulation efficiency reflects the measured wall performance full scale test, thus indicating efficiency under varied environmental loads: heat, moisture and pressure.

    The building design must be as a system, integrating all the subsystems together to function in concert. New design methodologies must be created along with new, more reliable and comprehensive measuring, testing and integrating procedures. New super insulators are capable of reducing energy usage below zero energy in buildings. It would be a shame to waste them by not taking care of the rest of the system. This thesis details the steps that went into this study and shows how this can be done.

  • 236.
    Thorsell, Thomas
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Edge loss minimization in vacuum insulation panels: Model verification2006Inngår i: Research In Building Physics And Building Engineering / [ed] Fazio P, Ge H, Rao J, Desmarais G, London, England: TAYLOR & FRANCIS LTD , 2006, s. 251-256Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Vacuum insulation panels have, by design, a thermal bridge at each of the edges of the panel. This paper presents continued work on an edge design that minimizes this effect, a serpentine edge. Numerical modeling as well as laboratory measurements has been done. Results presented here show that this serpentine edge have the potential to reduce the thermal bridge around the edges of a traditional vacuum panel alternatively enable designs with metal foil or thin metal sheet barriers which would allow other core such as glass fibers, open cell polyurethane instead of commonly used fumed silica. Fumed silica or aerogel that have pore-sizes in the nano region might not need stainless steel barriers to reach technical lifetimes of several decades but can still benefit from a sturdier shell. A welded stainless steel envelope helps to create a panel that will withstand handling and other loads in a construction.

  • 237.
    Thorsell, Thomas
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Källebrink, Ingemar
    Edge loss minimization in vacuum insulation panels2005Inngår i: Proceedings of the 7th symposium on Building Physics in the Nordic Countries, Reykjavík, 2005Konferansepaper (Fagfellevurdert)
  • 238.
    Thunberg, Pär
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Philipson, Olof
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Arkitektur.
    CODP Co operative design process - from urban strategy to detail2012Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    This project investigates the cooperation between architect and engineer. The context of the investigation is the design of buildings for a sustainable society. The goal of the project is to further the development of the sustainable built society by increasing the knowledge of the interdisciplinary cooperation between these two fields. The focus is a close cooperation already from the start of a project. By involving both fields in the early design stages it is thought that the knowledge and skills of each field is better utilized. With both parts working side by side, helping and learning from each others work, a more creative and innovate environment may be achieved.

    The project method consists of two parts. The first part is a research study investigating different forms of close interdisciplinary cooperation and different methods for sustainable design. This research study forms the foundation of the second part of the project, an experimental case design. By documenting and then evaluating the cooperation during the design process certain conclusions can be drawn about the investigated design method.

    The most important aspect of a close cooperation studied is the informal communication paths. It is essential that these are acknowledged and not limited by rigid formal communication plans. Nevertheless, it is important to include both the architect and engineer in the all the major design choices, which may require a general approach to the design process. A design approach similar to a common prototype loop was developed and tested.

    The case design experiment is a large office building in a suburb south of Stockholm called Flemmingsberg. The documentation of the design process shows a close involvement of both the architect and engineer in all the major design choices. It is presented by short graphical summaries of the process leading up to a design choice.

    The concluding discussion promotes the close cooperation by arguing that it creates a better design process with a higher knowledge input. It is also suggested that the design process promotes innovation, because it forces the members of the design team to widen their view and include new aspects in their design tasks.

  • 239.
    Tomas, Lindholm
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Lean in Construction Projects: Is lean suitable for all construction projects?2014Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Due to the low productivity growth in the construction industry, there are discussions about theories and tools that could support an increased productivity in construction projects. One such ‘theory’ or package of tools is lean. Lean has been used successfully for decades in the car manufacturing industry, Toyota for example, and in other industries as the shipbuilding industry. In the construction industry, the use of the word lean is not frequently used and construction projects could might implement lean concepts and tools in a greater extent than today.

    The purpose of this thesis is to increase the productivity in construction projects by evaluating if and in which types of construction projects different lean concepts and tools could be used and when it is worth to implement different lean concepts and tools. The research questions are about if there are any obstacles to implement lean and which lean concepts and tools that are most suitable for different types of construction projects.

    The findings, that will answer the research questions, are based on a theoretical view from an extensive literature review including prior case studies about lean in general as well as about lean in construction projects. The findings are also based on interviews, about the construction process and lean in construction projects, with managers at different types of projects, constructed by Skanska.

    Even though lean is already used in some extent in construction projects, the finding is that lean concepts and tools could be used in a greater extent in construction projects without obstacles. In addition to concepts and tools used in the car manufacturing industry, e.g. just-in-time, other concepts and tools have to be added. For example production control and planning are important to support lean in construction projects. In general, lean concepts and tools could be used in all types of construction projects. Some concepts or tools are more preferable in certain types of projects. Lean could be used only by the main contractor, however, to optimize the process by lean concepts and tool, it is preferable if the whole chain is adopting lean thinking.

    As a final comment, construction projects are not like car manufacturing facilities with repetitive work and products. But the construction industry has to take impact from it and the future will be more like the car industry, if the quality and the architectural creativity could retained in the projects.

  • 240.
    Twumasi Afriyie, Ebenezer
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Preparation and Evaluation of New Nanoporous Silica Materials for Molecular Filtration and for Core Materials in Vacuum Insulation Panels2013Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Nanoporous materials for gas purification and thermal insulation have been studied and developed for application in many areas. It is known that a single adsorbent may not adequately control multiple contaminants. Further the utilization of nanoporous material as thermal insulator in building applications is limited due to high cost. Moreover, in view of the global environmental movement for clean air and reduction of heating energy consumption in built environment, the development of new and better nanoporous materials will not only facilitate major advances in gas adsorption and thermal insulation technology, but also meet the new challenges that cannot be met with the nanoporous materials that are currently available. This thesis presents a synthesis of new nanoporous silica based materials, and the characterization and application of these materials for molecular filtration and thermal insulation. Commercial nanoporous materials have been used for benchmarking for the pore properties, the applicability, and the performance of these new materials.

    First a double metal-silica adsorbent has been synthesized. The preparation procedure is based on the use of sodium silicate coagulated with various ratios of magnesium and calcium salts which yields micro-meso porous structures in the resulting material. The results show that molar ratios of Mg/Ca influence the pore parameters as well as the structure and morphology. The bimodal pore size can be tailored by controlling the Mg/Ca ratio.

    In the second synthesis, pure mesoporous silica, SNP has been prepared using glycerol as pore forming agent and monovalent salts as coagulant. This leads to material with large surface area and uniformed pore size centred at 43 or 47 nm.  The materials further exhibits a low bulk density in the range of 0.077 to 0.122 g/ml and possess a high porosity in the range of 95-97%. The influence of acid type (organic or inorganic) on the pore parameters and on the tapped density has also been investigated.  

    A synthesis method has also been developed for the preparation of carbon-silica composites. The method involves a number of routes, which can be summarised as addition of activated carbon particles to (I) the paste, (II) the salt solution, or (III) with the sodium silicate solution. In route II and III the activated carbon is present before coagulation. The routes presented here leads to carbon-silica composites possessing high micro porosity, meso porosity as well as large surface areas. The results further shows that pore size distribution may be tailored based on the route of addition of the carbon particles. Following route I and III a wide pore size (1-30 nm) was obtained whereas by route II a narrow pore size (1-4 nm) was observed.    

    MgCa-silica chemisorbents were also developed using either potassium hydroxide or potassium permanganate as impregnate chemicals. A direct or post-impregnation procedure was employed. The results revealed that the impregnate route and amount cause a reduction in both specific surface area and pore volume.

    Finally the thermal conductivity and dynamic adsorption of H2S, SO2 andtoluene were measured. Results show that at room temperature and atmospheric pressure, a thermal conductivity of 28.4 and 29.6 mW/m.K were obtained for the SNP mesoporous silicas. The dynamic adsorption behaviour of the chemisorbents and composites indicate their ability to absorbed H2S, SO2 andtoluene respectively. The highest H2S uptake corresponds to chemisorbents with 11.2-13.6 wt% KMnO4. The effect of impregnation route, amount of KMnO4 and its location in the pore system are likely the key factors in achieving a large H2S uptake. For SO2 adsorption, the highest uptake capacity was observed for MgCa-68/32-KOH. The results further suggest that the key to large SO2 uptake is as a result of the synergetic effect between large mesopore diameter and extensive mesopore volumes. Carbon-silica composites with carbon content 45 wt % exhibits high toluene adsorption with composite via route I having the highest toluene adsorption capacity (27.6 wt % relative to carbon content). The large uptake capacity of this composite was attributed to the presence of high microporosity volume and a wide (1-30 nm) bimodal pore system consisting of extensive mesopore channels (2-30 nm) as well as large surface area. These capacity values of carbon-silica composites are competitive to results obtained for commercial coconut based carbon (31 wt %), and better than commercial alumina-carbon composite (9.5 wt %).

  • 241.
    Twumasi Afriyie, Ebenezer
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsmaterial.
    Karami, Peyman
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Norberg, Peter
    Högskolan i Gävle.
    Gudmundsson, Kjartan
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Textural and thermal conductivity properties of a low density mesoporous silica material2014Inngår i: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 75, s. 210-215Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this study, the pore structure, tapped density and thermal conductivity properties of a new type of nanoporous silica material have been studied. We have applied nitrogen physisorption, high resolution scanning microscopy and Transient Plane Source thermal conductivity measurements to investigate these properties. The new mesoporous silica SNP have large BET surface area, 400-439 m2 g-1 and possess high porosity in the range of 95-97%. The results further show pore diameter centred at 43 nm or 47 nm for the two materials studied. Tapped densities as low as 0.077 g/cm3 have so far been obtained and the thermal conductivity of these materials has been measured to 0.0284 and 0.0294 W (m K)-1 at room temperature and atmospheric pressure. The effects of tapped density, pore size diameter and particle morphology on thermal conductivity are discussed.

  • 242.
    Twumasi, Ebenezer
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Forslund, Mikael
    Högskolan i Gävle.
    Norberg, Peter
    Högskolan i Gävle.
    Sjöström, Christer
    Högskolan i Gävle.
    Carbon-silica composites prepared by the precipitation method. Effect of the synthesis parameters on textural characteristics and toluene dynamic adsorption2012Inngår i: Journal of porous materials, ISSN 1380-2224, E-ISSN 1573-4854, Vol. 19, nr 3, s. 333-343Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Three synthesis routes are presented here that leads to carbon-silica composites. These were characterized by nitrogen physisorption, by thermogravimetric analysis and by dynamic toluene adsorption test similar to Ashrae standard I45.1. The carbon-silica composites possess high microporosity and mesoporosity as well as large surface areas. Furthermore, the control of the microporosity as well as pore size distribution is possible because they depend on the amount of carbon used and of the synthesis route. Following routes I and III a wide micro-mesoporous pore size (1-32 nm) was obtained where as by route II narrow micro-mesoporous pore size (1-4 nm) was observed. In addition, pore diameters center in the range of 1.13-1.17 nm was observed when carbon content was 32 or 45 wt%. The dynamic adsorption of toluene was evaluated for carbon-silica composites obtained by three preparation routes at two different carbon contents, 32 and 45 wt% The results showed that a composite with 45 wt% carbon content and obtained via preparation route I gave the highest toluene adsorption capacity (27.6 wt% relative to carbon content). The large uptake capacity of this composite was attributed to the presence of high microporosity volume and a wide (1-32 nm) bimodal pore system consisting of extensive mesopore channels (2-32 nm) as well as large surface area. These capacity values of carbon-silica composites are by weight relative to carbon content and are competitive to, results obtained for commercial coconut activated carbon (31.1 wt%) and significantly better than a commercial alumina-carbon composite (9.5 wt%) at 0% efficiency.

  • 243.
    Törnqvist, Petra
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Ragnerstam, Erik
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Optimering av byggkomponenter, arbetsmetoder och redskap enligt JM:s tekniska plattform2004Independent thesis Advanced level (degree of Master (One Year)), 20 poäng / 30 hpOppgave
  • 244.
    Ucar, Zozan
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Fuktsäkra ytterväggsfogar mellan prefabricerade betongelement: En utvärdering av orsaker till fogproblem2018Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Användningen av prefabricerade byggnadsdelar har drivit fram en utveckling av fogar och fogmassor i byggsektorn. Ytterväggsfogar fyller många viktiga funktioner, de tar upp rörelser som uppstår i byggnadsdelar och utgör samtidigt ett väderskydd som samverkar med resterande del av ytterväggen. Problem i fogar ökar risken för vatteninträngning som i sin tur ökar risken för fuktproblem. Om fuktproblem uppstår kan det ge en negativ effekt på människors hälsa och hygien. Större och mer varierande elementstorlekar ställer högre krav på genomtänkta anslutningar. Det pågår en kamp mellan arkitekten, som vill minimera fogens storlek för en mer tilltalande byggnad, och den rationella konstruktören som vill ha en större fogbredd för en långsiktigt fungerande byggnad. Många faktorer styr fuktsäkerheten i fogar. Arbetet med att uppnå fuktsäkra fogar är en lång kedja med olika aktörer som kräver både god kunskap bland samtliga inblandade och samverkan mellan dessa.

    Studien identifierar orsaker till fogproblem genom analys av två byggnader, som är byggda i samma stad men under olika förutsättningar, och genom intervjuer med olika aktörer som på ett eller annat sätt jobbar med fogar i produktion. Olika aktörer upplever olika slags problem och för att bredda synen på fogproblem intervjuas också en person som aktivt jobbar med att sprida kunskap om fogar till aktörer. Målet med rapporten är att belysa de kritiska faktorer som leder till fuktproblem i ytterväggsfogar, bidra med en djupare förståelse för olika aktörers syn på problemet och presentera förslag på förbättringar inför framtida projekt. Kritiska faktorer som enligt studien kan leda till fogproblem är bland annat osäker konstruktionslösning, otillräcklig fogbredd, otät fog och brister i fogningsutförandet.

    Fogproblem  påverkas av många samverkande faktorer under hela byggprocessen. Risken för fogproblem påverkas bland annat av fogdimensionering, fogutformning och slagregnsmängden i det område där byggnaden är placerad. Brister i fogkonstruktionen ställer högre krav på ett korrekt fogningsutförande. En otät byggnad i ett område med hög slagregnsmängd är mer utsatt för fuktskador än en byggnad i ett område med mindre utsatthet för slagregn. Studien visar att det saknas förståelse för de krav som behöver uppfyllas vid fogdimensionering och användning av toleranser. Den valda fogbredden ska kunna ta upp de rörelser som förväntas ske i fogen och även inkludera toleransen för fogbredden i det aktuella projektet. Det är försent att upptäcka problem under montering av elementen. Konstruktören ska säkerställa att en korrekt minsta fogbredd har dimensionerats under projektering.

    Generaliserade slutsatser kan inte dras från arbetet i och med att det koncentrerats till endast två byggnader och ett fåtal intervjupersoner. Arbetets syfte är att öka förståelsen för den långa kedjan som påverkar kvaliteten på fogen. En ökad förståelse leder till en större medvetenhet vid kravställningar och val, vilket skapar goda förutsättningar för samtliga aktörer att tillsammans lyckas bygga fuktsäkra ytterväggsfogar.

     

  • 245.
    Viklund, Fredrik
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Modellbaserad mängdavtagning med hjälp av BIM2011Independent thesis Basic level (professional degree), 30 poäng / 45 hpOppgave
  • 246.
    Vranjkovina, Alija
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Markus, Nida
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Fönsterpanel sparar energi2013Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    In Sweden, one-third of total energy consumption is used for the running and heating of buildings, which is quite a lot. By

    implementing energy efficiency in existing buildings one can cut energy use, and thereby provide huge savings. Energy efficiency

    can be done in various ways, for instance by installing solar panels, solar cells or by sealing and insulating the building

    envelope. The cost depends on and vary between these different measures, and they also provide different effects. Even when the

    aforementioned measures have been implemented, one can not get away from the fact that one square meter of window leaks as

    much as ten square meter of the wall. The purpose of this thesis is to examine the possibility to reduce energy consumption

    through the windows by using vacuum insulation panels, and thereby reduce the house's transmission losses. The vacuum

    insulation panel will only be used six hours a day, during the night between 12 a.m. and 6 a.m.

    We achieved our purpose by making calculations in an energy calculation software named VIP-Energy, and also manually

    (by hand). Our conclusion is that savings can be made. These savings are about ten percent of all transmission losses, thus it

    is possible to save 47,5 kilowatt hours per square meter, window and year by installing vacuum insulation panels over the

    windows.

  • 247.
    Vrána, Tomáš
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Björk, Folke
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    A laboratory equipment for the study of moisture processes in thermal insulation materials when placed in a temperature field2008Inngår i: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 22, nr 12, s. 2335-2344Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The aim of this paper was to describe design and use of a laboratory set-up that makes a very well controlled moisture load to detect material properties of thermal insulation materials. The outer shell of the set-up is a plastic box with thermal insulation on its outer side. This box is placed on a balance for recording of weight loss of the entire system. The sample to be tested is placed on top of this box. The inside of the box is heated electrically and the air circulation is driven by a fan. There is a water reservoir in the box, which is also placed on a balance in order to record the amount of moisture added to the air in the box. To obtain the highest moisture contents it was found necessary to use a wick in the reservoir that increases transport of moisture to the air in the box. The whole set-up was placed in a climate chamber in order to get well controlled temperature and moisture content for the outside of the box. In this way, well controlled gradients of temperature and moisture content in air were achieved around the specimen. The set-up was found to function well and was in this study useful for measurement of the samples moisture resistance factor.

  • 248.
    Wallgren, Hanna
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Slitsade stålreglar för fönstermontage: En jämförande analys av karmreglar2016Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
  • 249.
    Wang, Cong
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Installations- och energisystem.
    Kilkis, Siir
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Tjernström, Johan
    Akademiska hus.
    Nyblom, Jerker
    Akademiska hus.
    Martinac, Ivo
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Installations- och energisystem.
    Multi-objective optimization and parametric analysis of energy system designs for the Albano university campus in Stockholm2017Inngår i: Procedia Engineering, Elsevier, 2017, s. 621-630Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    In this study, a multi-objective optimization approach is applied to the energy system design of the Albano university campus in Stockholm. The greenhouse gas emissions, the life cycle cost and the net exergy deficit of the campus are minimized, while the nearly zero energy requirements are respected. Four optimal solutions are identified based on those under equal importance, environment-oriented, economy-oriented, and exergy-oriented scenarios. The energy components of the four scenarios are analyzed and compared. A parametric analysis is conducted to investigate the impact of the variations in a number of economic, environmental and technical parameters on the composition of the optimal solution.

  • 250.
    Westberg, Åsa
    et al.
    KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik.
    Momcilovic, Dane
    KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik.
    Björk, Folke
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Karlsson, Sigbritt
    KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik.
    Investigation of the emissions from an acrylate and a carpet adhesive in humid and alkaline environments by the micro-scale headspace vial (MHV) method2010Inngår i: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 95, nr 9, s. 1877-1882Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this study, emissions from a carpet adhesive and an acrylate dispersion in simulated humid and alkaline environments were investigated by the micro-scale head space vial (MHV) method. Relative humidity (RH) levels of 75%, 86% and 93% were tested in combination with pH values in the range 10-13. The polymeric materials were exposed at these conditions in sealed 20 mL headspace vials. Chemical analysis of the volatile emission products was performed by headspace solid-phase micro-extraction with subsequent gas chromatography mass spectrometry after three and 36 days. The effect of the RH and pH on the emissions was investigated. It was found that 2-ethyl-1-hexanol was one of the major volatile constituents, and that the emissions of this compound increased dramatically for pH > 12. This can be explained by alkali catalyzed hydrolysis of ester-linked 2-ethylhexyl groups. The other compounds that were detected after exposure of the adhesive were not as strongly dependant on pH and RH as 2-ethyl-1-hexanol. (C) 2010 Elsevier Ltd. All rights reserved.

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