Change search
Refine search result
123456 1 - 50 of 256
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • 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.
    A. Taher, Ali
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    BIM Software Capability and Interoperability Analysis: An analytical approach toward structural usage of BIM software (S-BIM)2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This study focused on the structuralanalysis of BIM models. Different commercial software (Autodesk products and Rhinoceros)are presented through modelling and analysis of different structures with varying complexity,section properties, geometry, and material. Beside the commercial software, differentarchitectural and different tools for structural analysis are evaluated (dynamo, grasshopper,add-on tool, direct link, indirect link via IFC).

  • 2.
    Acar, Yalda
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Skrobic, Karina
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Småhuset – val av bergvärme, fjärrvärme eller pellets2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis describes the new construction of a small house and it includes studies of three heating systems: geothermal heating, district heating and pellet. The purpose of this thesis is to project a small house which can manage Building Regulations, BBR conditions and then examine three possible heating systems for the small house. This thesis is a literature study which gives an understanding of the heating systems technical structure, properties and costs. An empirical study completes the literature study by giving a deeper understanding of district heating costs and pellet costs. The empirical study contains two interviews, one of which was conducted in a district heating corporation and the other interview was conducted in a pellet corporation. The interview persons have answered structured questions in investment, maintenance and operating costs. The studies shows that the three heating system are different from each other for example the investment costs for district heating is much cheaper than the investments cost for pellets and geothermal heating. Finally, settles a comparison in the three heating systems properties and costs settles through a value analysis. The value analysis was an effective method when we based on literature studies and empirical studies made a valuation of the heating systems properties, investment costs, maintenance and operating costs. A weighting showed that district heating as heating system is the most optimal solution for the small house located in Borlänge.

  • 3.
    Aderskog, Mikael
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Hoff, Christopher
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Energi- och kostnadseffektiva klimatskal: För lager-, industri- och kontorsbyggnader2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    A study to optimize insulation thickness for stock-, industrial- and office-buildings for external walls and roof in an economical perspective has been conducted on behalf of DynaMate. DynaMate’s role is to maintain all Scania’s buildings. Analysis has also included other parts of the building envelope, such as windows, exterior doors and industrial doors. In this thesis, three different types of exterior wall constructions has been investigated, these are a sandwich design consisting of sheet metal and a another one consisting of concrete, as well as a wall of concrete with a coating of plasters. Furthermore, two types of roof structures have been studied, these are TRP-sheets and a concrete structure, both of which are externally isolated. For all types of building envelopes, different standard thicknesses of insulation have been used and the U-value of the windows has been varied.

    To calculate the energy needed for the different kinds of buildings, the program IDA Indoor Climate and Energy has been used.  Furthermore, a sensitivity analysis of the air tightness has been implemented for the building envelope. Based on the program results LCC (Life-cycle cost) calculations have been carried out for all combinations, thus be able to form an idea of ​​the combination and what kind of structure that is most economically tenable.

    A thermograph study was conducted in an existing warehouse at Scania. Observations show that the connection between the sandwich material of sheet metal and the foundation wall is flawed as this has a much lower thermal resistance compared to other parts of the building envelope. An alternative connection was developed which reduces the heat loss to one-fifth of the initial connection.

    An analysis regarding the companies approach to the vapour barrier in roof structures for industrial buildings has been investigated from a moisture standpoint. The analysis shows that without a functioning vapour barrier the moisture content in the construction increases over time, which leads to increased heating costs.

    The conclusion of this study shows that a reduction of insulation thickness for all types of studied buildings is more economically tenable than increasing the thickness. This is mainly due to the high cost of capital that the company uses for these investments. This means that any savings on cooling and heating costs very quickly is overthrown by the interest rate of the additional cost of the investment.

  • 4.
    Adrian, Larek
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Borg, Richard
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Optimering av värmeflödet genom en köldbrygga2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    När det blir lättare att använda sig av datorer och mjukvara idag blir det alltmer aktuellt att tillämpa speciella metoder som förenklar byggprocessen. Det är däremot samma problem med beräkningar av exempelvis hållfastheten, kostnaden och annat vi ställs inför idag som vi gjorde för flera år sedan. Ett av de viktigaste problemen vi måste lösa är hur vi kan minska transmissionsförluster i form av värme för att spara på energi.

    I detta arbete undersöks hur en köldbrygga beter sig vid anslutningen vägg och platta på mark. Data tas fram för att ge tydliga resultat vart och när energi går förlorad. Detta görs genom att undersöka värmeflödet genom konstruktionen med olika tjocklekar av isoleringen i väggen och runt plattan. För att ha en utgångspunkt används en av de vanligare anslutningstyperna för yttervägg och platta på mark där isoleringstjocklekarna av mineralullen i väggen och cellplaster under plattan varierar för att undersöka värmeförlusterna.

    Informationen kring den vanligaste anslutningstypen har tagits fram genom mailkontakt med några av de större villatillverkarna på marknaden idag. Bland dessa är Skidstahus, Borohus, A-hus och flera. Genom att därefter analysera värmeflödet i programmen COMSOL och Matlab har vi tagit fram ett uttryck som visar värmeflödet genom den linjära köldbryggan.

  • 5.
    af Klintberg, Tord
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Air Gap Method: Air-Gaps in Building Construction to avoid Dampness & Mould2012Doctoral thesis, comprehensive summary (Other academic)
  • 6.
    af Klintberg, Tord
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Heated air gaps: a possibility to dry out dampness from building constructions2008Licentiate thesis, comprehensive summary (Other scientific)
    Abstract [en]

    The air gap method is a modification of the common way of building indoor walls and floors. The aim of the method is to make a construction, less fragile to water damage, with air gaps where moisture can be removed with a thermally driven air flow, caused by a heating cable. The thesis includes a number of experimental studies of this method.

    Temperature and convective air flow in a vertical air gap was studied and it was noted how air flow increased with raised power of the heating cable. The air flow for one meter of wall varied between 50 m3/day (13 air changes per hour) and 140 m3/day (36 air changes per hour). The lower value was caused by a temperature difference in the range 0.2-0.3 oC. Without heating no air flow was found.

    In studies of moisture and RH in wet “slab on ground” constructions, it was noted how the slab in the room with the air gap method dried to a much higher extent than the slab in the room built in an ordinary way. It was also noted that moisture was transported from the air gap in the floor and up through the air gap in the wall. In the room with the air gap construction, the RH values beneath the floor was at a lower level (and below 75 % RH) than the RH values beneath the floor of conventional construction. Mould does not grow below 75 % RH.

    In the study of a flooded intermediate floor it was noted how the thermally driven convective air flow evidently speeded up drying of the construction. Mould growth was only noted in the case where the heating cables were turned off.

  • 7.
    af Klintberg, Tord
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Air Gap Method: Dependence of water removal on RH in room and height of floor air gap2012In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 56, p. 1-7Article in journal (Refereed)
    Abstract [en]

    This study is performed in combined floor and wall constructions with air gaps within and with a heating cable in the vertical air gap. All surfaces of the air gap are covered with polystyrene plastic to avoid leakage into the construction. Wet gypsum boards that are weighed at start and end of experiment are used to measure the dry out process.Three different heights of the floor air gap, 25 mm, 15 mm and 5 mm are investigated. The influences of the RH in the surrounding room and of the wetness of the gypsum boards are also investigated.It is shown that the height of the floor air gap has a great impact on the rate of drying. The optimal height is less than 25 mm and somewhere between 15 and 5 mm.

  • 8.
    af Klintberg, Tord
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Air Gap Method: drying of a concrete slab on ground construction2010In: Structural Survey, ISSN 0263-080X, E-ISSN 1758-6844, Vol. 28, no 4, p. 281-299Article in journal (Refereed)
    Abstract [en]

    Purpose – The purpose of this paper is to report on a study which has been carried out on a timber floor construction above a ground-supported concrete slab, which was used in small detached houses built in Sweden during the period 1960-1990. This method of building has turned out to be a risky construction nowadays, but there are 800,000 houses built this way in Sweden.

    Design/methodology/approach – By using the patented Air Gap Method inside building constructions, harmful water can be dried out. The method ventilates air gaps inside walls and floors with an air flow driven by thermal buoyancy caused by a heating cable in the vertical air gaps. The drying out process has been studied both by measuring the moisture level in the slab and also by measuring the humidity transport and comparing this with air flow measurements.

    Findings – The paper shows that the Air Gap Method manages to dry out water from both the slab and the overlaying wooden construction. The study shows also that the relative humidity (RH) levels in the air space below the floor are reduced in a significant way, thus minimizing mould growth. It is also shown that a thin layer of concrete upon floor beams prevents mould to grow even in a humid situation.

    Research limitations/implications – The research reported in this paper is only concerned with timber-framed small detached houses. Similar studies of apartment buildings are ongoing.

    Practical implications – The Air Gap Method can thus be useful in the context of renovating a water damaged house of this type built during this 30-year period. The method provides a possibility of drying out such damage without a separate drying period. The inhabitants could therefore be able to use a renovated water-damaged kitchen six/eight weeks earlier compared to ordinary building methods.

    Originality/value – The paper is useful because it provides better understanding of the mechanism of RH inside a building construction and how this parameter could be lowered. The paper is also useful in the context of renovating water-damaged small detached houses built by the risky method of construction used in the last decades of the twentieth century.

  • 9.
    af Klintberg, Tord
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Air gap method: measurements of airflow inside air gaps of walls2008In: Structural Survey, ISSN 0263-080X, E-ISSN 1758-6844, Vol. 26, no 4, p. 343-363Article in journal (Refereed)
    Abstract [en]

    Purpose - Water damage is a severe problem in modern construction, causing economic loss and health implications. By using the patented Air Gap Method inside building constructions, harmful water in the construction can be dried out. The method drains and ventilates air gaps inside walls and floors with an airflow driven by thermal buoyancy caused by a heating cable in vertical air gaps. This paper aims to investigate this method and measurements of airflow inside air gaps of walls. Design/methodology/approach - This study investigates the measured correlation between the power of the heating cable, the difference of temperature inside and outside the air gap, and the airflow. Data are collected by experimentation with a full-scale constructed wall. Findings - The study finds that airflow increases with raised temperature difference between the air gap and room and with raised power of the heating cable. The measured airflow reaches values up to 140 m3/metre wall and day for one cable. A small increase in temperature, between 0.2 and 0.3 oC inside the vertical air gap results in an air flow of approximately 60 m3/metre wall and day. The air change rate per hour for the air inside the wall construction varies between 15 times for a 6 W/m cable and 37 times for a 16 W/m cable. Practical implications - The method provides the means to build houses in a more robust way, minimising the negative effects of water damage. This investigation provides an understanding of how temperature and ventilation are related in this method of construction. Originality/value - The issue of ventilated construction is rarely investigated in scientific research.

  • 10.
    af Klintberg, Tord
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Molnar, Miklos
    LTH.
    Nilsson, Martin
    LTU.
    Plos, Mario
    Chalmers.
    Silfwerbrand, Johan
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Thelandersson, Sven
    LTH.
    System för personlig meritering och certifiering för ingenjörer inom den svenska byggsektorn2018Report (Other (popular science, discussion, etc.))
    Abstract [sv]

    Sammanfattning

    Incitament till systematisk personlig kompetensutveckling för ingenjörer inom byggbranschen saknas. Detta leder till att vi har svårt att upprätthålla tillräckligt hög kompetens och utvecklingstakt i branschen.

    Frågan är om ett system för meritering kan underlätta och ge större incitament för kontinuerlig kompetensutveckling än vad som finns idag. I ansökningstexten till detta projekt nämns bland annat att: Det är dock väsentligt att ett sådant system är utformat på ett sätt som gör att branschens aktörer finner det relevant och behövligt, samt att det verkligen stärker ingenjörens roll och bidrar till att kompetens bibehålls och utvecklas. I projektet ingår också att beakta ekonomiska och legala aspekter.

    Arbetet rör först och främst konstruktörer även om slutsatserna kan tillämpas på stora delar av ingenjörskollektivet. Det förefaller finnas brist på kompetenta ingenjörer för centrala positioner i stora projekt med förmåga att upprätthålla kontroll och kommunikation med projektets ingående parter, som byggherre, installationsföretag etc.

    Ett flertal intervjupersoner hävdar att många stora bygg- och anläggningsprojekt är fragmentiserade med bristande intern kommunikation och att de lider av höga merkostnader.  Intervjuade personer inom Trafikverket, med inblick i den egna verksamheten, menar att det kan finnas höga merkostnader även inom de egna projekten. Trafikverket är dock en mycket kompetent byggherre. Det är troligt att mindre byggherrar med lägre kompetens kan ha en värre situation avseende denna typ av kostnader. Många merkostnader skulle kunna begränsas eller undvikas om kompetensnivån höjs inom ingenjörssektorn.

    Ett meriteringssystem med vidareutbildning, mentorskap mellan seniorer och juniorer, fokuserat på bland annat personlig utveckling skulle kunna höja kompetensnivån bland ingenjörer. Ett meriteringssystem skulle göra konstruktörsyrket mer attraktivt, om det blir tydligt att en oerfaren konstruktör har en karriärväg mot högre expertkompetens.

    Förbättrade meriter kan valideras genom ett certifieringssystem, som bör fokusera på ingenjörskunskaper såsom konceptuell förståelse och bedömning av bärförmåga och konstruktioners verkningssätt. Systemet ska ha en kontroll- och reklamationsfunktion, som hanterar eventuella kvalitetsproblem hos den certifierade personen. Ett certifieringssystem dokumenterar kompetensnivån för en certifierad och kan därigenom göra det lättare för byggherrar att säkerställa kvalitet i sina beställda projekt.

    Beträffande värdet av certifiering påvisas i en brittisk rapport att certifiering för testlaboratorier är lönsamt för ingående parter, alltså både för de certifierade och för beställarna. Rapportens slutsats är att det är samhällsekonomiskt lönsamt med certifiering, då den bygger upp förtroende samt minskar risker.

    Regeringen skulle kunna ge en eller flera myndigheter, exempelvis Transportstyrelsen och/eller Boverket ansvar för personlig kompetensutveckling inom väg och vattenbyggnadssektorn. Denna myndighet skulle alltså få ett liknande ansvar som Socialstyrelsens, som under ett flertal år har medverkat till att utveckla medicinsektorn, med en höjd personlig expertis som resultat. Socialstyrelsens verktyg har här varit personcertifiering (läkarlegitimation). Dessutom ges vidareutbildning, samt handledar- och mentorskap inom medicinsektorn.

    Trafikverket skulle eventuellt kunna undersöka möjligheten att upphandla certifiering för nyckelkompetenser samt definiera dessa kompetenser i sina egna projekt. Ett liknande förfarande finns hos Stockholms Exploateringskontor när det gäller upphandling av nyckelkompetenser. Om Trafikverket skulle avisera att det skulle ställa särskilda krav på certifiering vid cirka 20 upphandlingar år 2021, så skulle det ge konsultbolagen tid att etablera ett antal certifierade ingenjörer. Dessa projekt kan då jämföras med projekt utan certifiering.

    Det är förmodligen kostsamt att bygga upp ett svenskt system för personlig certifiering liknande medicinsektorns legitimationssystem. Författarnas förslag är därför att branschen kan börja använda internationella certifieringssystem, exempelvis ”Institution of Civil Engineers” (ICE) och ”Institution of Structural Engineers” (IStructE). ICE är ett bredare system för väg och vattenbyggnadsingenjörer i allmänhet och IStructE certifierar konstruktörer. ICE och IStructE fokuserar på ingenjörs- och marknadskompetens, personlig utveckling och har en kontroll- och reklamationsfunktion samt olika grader avseende medlemmarnas kompetens.

    De svenska konsult- och entreprenadföretagen har i denna rapports intervjuundersökning visat stort intresse för att låta meritera och certifiera sina konstruktörer, särskilt om stora beställare kommer att efterfråga meriterade konstruktörer. Om internationella certifieringssystem (ICE och IStructE) används, kommer förmodligen svenska konsult- och entreprenörföretag att stärkas på en internationell marknad.  Under en övergångstid behövs ett register över befintliga svenska kompetenta ingenjörer så att dessa inte stängs ute från marknaden.

    Det kommer att ta tid att införa utökad meritering, mentorskap och certifiering. Det är fråga om en kulturförändring i ingenjörssektorn och det behövs då en uthållighet hos branschen, framför allt hos byggherrar. Systemet kommer inledningsvis att medföra ökade kostnader, medan besparingar och vinster kommer i ett senare skede.

  • 11.
    af Klintberg, Tord
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Jóhannesson, Gudni
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Air gaps in building construction avoiding dampness and mould2008In: Structural Survey, ISSN 0263-080X, E-ISSN 1758-6844, Vol. 26, no 3, p. 242-255Article in journal (Refereed)
    Abstract [en]

    Purpose - Water damage is a severe problem in modern construction, causing economic loss and health implications. The patented Air Gap Method, which is a slight modification of the common infill wall construction, provides means to build houses in a more robust way, minimizing the negative effects of water damage. This full-scale study of the method aims to show how walls and floors may be built to create ventilation within the construction, with air gaps equipped with heating cables. The general hypothesis is that the patented Air Gap Method drains and evaporates dampness after water damage. The purpose of this study is to show how the method is built and how the method deals with water damage, such as a flooding, and with mould growth. Design/methodology/approach - The Air Gap Method is based on a common timber-framed construction and is completed by the provision of inlets, air gaps, slits, and outlets. The power for the convective airflow is given by an electrical heating cable. The study was carried out as a full-scale experiment using a 24m2 large apartment build by this method. This apartment was flooded with 120 litres of domestic wastewater and the drying period was compared when heating cables were switched on or not. Mould growth was also investigated. Findings - The method dries out a flooded floor in nine days when two heating cables were switched on, in 13 days with one heating cable and 21 days when the heating cables were off. The method prevents all mould growth provided that the indoor RH is lower than 65 per cent. Practical implications - The method provides means to build houses in a more robust way, minimizing the negative effects of water damage. Originality/value - The issue of ventilated construction is rarely investigated in scientific research.

  • 12.
    Al-Ayish, Nadia
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Environmental Impact of Concrete Structures - with Focus on Durability and Resource Efficiency2017Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Concrete is essential for the construction industry with characteristic properties that make it irreplaceable in some aspects. However, due to the large volumes consumed and the energy intense cement clinker production it also has a notable climate impact. In order to reach the international and national sustainability goals it is therefore important to reduce the climate impact of concrete structures.

    There are many ways to influence the environmental impact of concrete and a detailed analysis is one of the actions that could push the industry and the society towards a sustainable development. The purpose of this research is to evaluate the environmental impact of concrete structures and the built environment and to highlight the possibilities to reduce that impact with choice of concrete mix and innovative design solutions.

    A life cycle assessment (LCA) was carried out to analyze the environmental impact of two thin façade solutions with innovative materials and to evaluate influences of different greenhouse gas reducing measures on concrete bridges. The influence of supplementary cementitious materials (SCM) in terms of climate impact and durability was also analyzed.

    The results indicate that SCMs have a twofold effect on the climate impact of reinforced concrete structures. Not only do they reduce the greenhouse gases through cement clinker replacement but also by an improvement of durability regarding chloride ingress. Currently, this is not considered in the regulations, which makes it difficult to foresee in LCA at early design stages. The results also show great possibilities to reduce the climate impact through different measures and design alternatives and the need for further development of products and solutions.

  • 13.
    Al-Ayish, Nadia
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    During, Otto
    Malaga, Katarina
    Silva, Nelson
    Gudmundsson, Kjartan
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    The influence of supplementary cementitious materials on climate impact of concrete bridges exposed to chloridesManuscript (preprint) (Other academic)
  • 14.
    Al-Ayish, Nadia
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Grimlund, Tor
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Projektering av ett småhus med fördjupning inom värmesystem2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 15.
    Al-Ayish, Nadia
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Mueller, Urs
    Malaga, Katarina
    Gudmundsson, Kjartan
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Life cycle assessment of facade solutions made of durable reactive powder concrete2017Conference paper (Refereed)
  • 16.
    Andersson, Mattias
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Murray, Simon
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Sveriges nordligaste passivhus: En undersökning av möjligheten att bygga ett passivhus i Luleå2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 17.
    Angerstig, Kristofer
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Eidenstedt, Olle
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Fuktvariationer i uteluftsventilerade vindsutrymmen2002Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • 18.
    Antonopoulos, Charalampos
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Low slope roofs: Moisture transfer in inverted roofs constantly exposed to high moisture loads and drainage systems2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Low slope roofs are roofs with an inclination between 1:16 and 1:4 and have been constructed and preferred for many years due to the benefits they present. The goal of the present work is to study the following problems of low slope roofs, as they are suggested by previous relevant theses and the current needs of the market.

    1. Moisture transfer in low slope roofs with constant exposure to high levels of relative humidity. Is protection against corrosion required for steel beams placed directly under the external membranes? If yes, what kind of protection is that?
    2. Roof drainage on low slope roofs

    The study of the first subject was based on simulations of this type of structures in order to see how external moisture affects the moisture level and the potential for corrosion on steel beams. The main goal was to conclude whether we can actually build inverted roofs with steel plates or beams lying right under the roof membrane and what kind of protection is more appropriate to apply, in case it is required.

    According to the literature review conducted on roof structures, corrosion and corrosion protection, as well as the results of the simulations, the main factor defining the corrosion potential is the indoor environment. Moreover, paint coating seems to be the indicated anticorrosive protection.

    Regarding drainage, the study focused on the literature review of the current situation, the solutions applied, the existing regulations and guidelines regarding the type of systems used (full flow or gravity, internal or external), the construction of drainage valleys (inclined or horizontal) and the placement and dimensioning of drains and overflows, in order to create a short handbook with issues to be considered by the roof engineer.

    The main conclusions are that drain valleys are suggested to be constructed completely horizontal, in order to facilitate the cooperation between drains, and that full-flow systems are more efficient than gravity ones and should be preferred, as long as the roof is not exposed to solid material and prone to its accumulation around drains (e.g. roofs covered with vegetation or stone ballast, with overhanging or nearby trees).

  • 19.
    Appelberg, Emelie
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Bremberg, Maria
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Koldioxidneutrala hus2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 20.
    Arbman Carlsson, Kristin
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Det hållbara huset - Huset som är energimässigt självförsörjande2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 21.
    Aruste, Maria
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Cristvall, Katarina
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Effektivisering av produktionen: Tillämpning av "Lean Production" vid prefabricering av betongelement2004Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • 22.
    Aryafar, Aida
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Boström, Kajsa
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    LCC analys av stommaterial – Trä vs Betong2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 23.
    Bahceci, Derya
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Drivas, Georgios Valdemar
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Prefabricerade moduler – en jämförelse2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The sector for industrialized construction has expanded since the 18

    thcentury. Prefabrication of construction elements has become an efficient way to build with respect to reduce costs and save time in construction projects. Today, players in the construction-sector are aware of the grand potentials to build a lot more cost-efficiently with prefabrication as an alternative to the more traditional way of building on site. This report is a study of the construction process for three different methods of prefabrication.

    The purpose with this report is to compare different types of prefabricated building-elements with a prefabricated house module that are non-existing in the Swedish market. The study is done with respect to manufacture, transport and mounting of construction elements where pros and cons are weighed in each prefab method.

    The one method that are not in the Swedish market yet, are utilized in the USA by the construction company "Blu homes". The concept of "Blu Homes" is prefabricated constructions of complete foldable villas. The folded villas are transported to the building site where they are turned up on the pre-cast foundation before they are folded up into fully finished houses. Their concept has been an inspiration-source to the module that, in this report, is named "Hybrid element". The other two methods that are used in Sweden, is prefabricated flat elements respectively prefabricated "boxes" or volume-elements.

    The study shows that the prefabrication of flat elements is more suitable with an eye to transport, because a larger floor area can be transported simultaneously. The volume element method is, however, more advantageous given that a larger proportion of the work can be done in the factory so that the construction requires less work to be done in the building site.

    What makes the Hybrid elements to an attractive alternative is that this module consists of both a fixed volume element, and a part that is folded. This combines the both mentioned pros i.e. that it is possible to transport the double floor area with the same number of transport as for a volume element. These two advantages combined makes these elements to a hybrid that can be applied both to the mark for flat elements and also for volume elements.

  • 24.
    Balkåsen, Fredrik
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Strömholm, Ruben
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Stomförstärkningsmetoder vid påbyggnad2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    I takt med att Stockholm växer har det uppkommit ett behov av förnyelse och förtätning i stadens mest centrala delar. En förtätning av Stockholm city har resulterat i ett ökat intresse av att kunna bygga på befintliga hus. Detta examensarbete syftar till att undersöka de laster som tillkommer vid påbyggnad av en befintlig stomme, samt hur dessa laster sedan hanteras med hjälp av stomförstärkningsmetoder. Vidare undersökts konstruktörens arbetsprocess fram till den slutgiltiga lösningen. För att genomföra detta har en kvalitativ studie utförts genom intervjuer med sakkunniga konstruktörer. Fyra stycken fallstudieobjekt har valts ut för att analysera de förstärkningsmetoder som praktiserats. För att avgränsa studien undersöks endast projekt som omfattas av påbyggnad med förstärkta befintliga stommar från 60- och 70-talet lokaliserade i Stockholms innerstad. Studiens slutsats visar att de mest problematiska lastfallen som kan uppstå är dels husets stabilitet, vilket medför åtgärder som påverkar byggnadens planlösning, samt grundförstärkning vilket resulterar i komplicerade och tidskrävande förstärkningsåtgärder. Gällande konstruktörens arbetsprocess krävs information och beslut i rätt skeden för att hitta en hållbar och effektiv förstärkningsmetod. Den största risken i processen är konstruktiva ändringar i sena skeden, vilket kan resultera i en sämre teknisk lösning.

  • 25.
    Ballester, Javier Arrué
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Low Ewergy Supermarket in a Mediterranean Climate2008Independent thesis Basic level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 26.
    Banda, Wojtek
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Termiskt och mekaniskt optimerade anslutningar av betongkonstruktioner2004Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • 27.
    Bellan, Nathalie
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Orsaker och sammanhang kring avvikelser i processen med prefabricerat byggande2007Independent thesis Advanced level (professional degree), 30 credits / 45 HE creditsStudent thesis
  • 28.
    Bellù, Alberto
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Energy storage systems: an approach involving the concept of exergy2009Independent thesis Basic level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 29.
    Bengtson, Susanne
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Slåtteby, Anna
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Hållbart byggande ur ett helhetsperspektiv: Teknik, Strategier och Ekonomi2004Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • 30.
    Berg, Johan
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Fridykcenter - Ett sammarbetsprojekt2008Independent thesis Basic level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 31.
    Berglin, Mathias
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Konstruktion av villa med grönt tak2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 32.
    Bergman, Louise
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Besiktning, byggfel och risker vid nyproduktjion av bostäder: En sammanställning och konsekvensanalys2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 33.
    Bergstedt, Gustav
    et al.
    KTH, Superseded Departments, Building Sciences and Engineering.
    Wiberg, Magnus
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Effektiv betong för småhusproduktion: Betong med högt luftinnehåll för platta på mark1999Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • 34.
    Bergstrand, Karin
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Jonsson, Sofie
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Furfurylering och värmebehandling av trä: Är detta två modifieringsprocesser för framtiden?2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This article is one part of a bachelor's essay within the Civil Engineering program at the Royal Institute of Technology. Two wood modification methods, furfurylation and thermal modification of wood, are studied in this article.  The purpose is to examine why these modification methods still have not managed to compete with the conventional pressure treatment. How furfurylation and heat treatment is done, environmental impacts or other obstacles using the methods are investigated. The goal is to assess the possibilities for these modifying methods to increase their market share in the future. The conclusion is that both methods are clearly more environmentally friendly than conventional pressure treatment.  In most areas they are able to provide a necessary increase of the resistance in order to compete with pressure treatment. A disadvantage of both furfurylation and heat treatment of wood is that they cause poorer impact strength. In addition, heat-treated wood is not suitable for load-bearing structures .The obstacles that so far have held back the use of these methods are primarily a higher price and the fact that the two products are not as available in the market as conventional pressure-treated lumber. There are great opportunities for the methods to increase their market share in the future if more focus can be on life-cycle thinking at the same time as the knowledge of the materials in the industry growths.

  • 35.
    Bergström, Louise
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Uttorkning av betongbjälklag: En utmaning och en möjlighet2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Betong har länge varit det mest använda byggnadsmaterialet. Dess goda beständighet, formbarhet och hållfasthet har gjort att den till ett av våra viktigaste byggnadsmaterial. Uttorkningen av betongbjälklagen är en del av ett projekts kritiska linje eftersom det inte är möjligt att applicera golvbeläggningen innan detta moment är utfört.

    JM inledde 2016 ett pilotprojekt där man istället för utfackningsväggar prövade att använda prefabricerade betongytterväggar, vilket förkortar produktionsledtiden och gör att huset blir tätare. I samband med detta väcktes frågan om hur de prefabricerade betongväggarna påverkade uttorkningen av betongen.

    Detta examensarbete syftar till att undersöka hur JM arbetar med uttorkningen av betongbjälklag och att utreda vad JM kan göra för att undvika att betonguttorkning blir ett problem för byggarbetsplatserna.

    För att ta reda på hur JM arbetar med uttorkning av betongbjälklag intervjuades platschefer och arbetsledare. Intervjuerna visade att platsledningen upplever att betonguttorkningen utgör ett problem i vartannat till vart tredje projekt och att det skulle behöva fokuseras betydligt mer på den. De visade även att de som arbetar med betongen har god kunskap om uttorkning av betong och eventuella åtgärdsmetoder om torkningen går för långsamt. Hur betonguttorkningen hanteras beror dock till stor del på platsledningens erfarenhet.

    När ett projekt påbörjas görs en fuktdimensionering av BetongIndustri som visar vilken betongkvalitet som krävs för att betongen ska hinna torka till den önskade relativa fuktigheten under utsatt tid. Den visar även om det finns en risk att det uppstår problem någonstans. Det finns dock flera moment som kan leda till att det senare uppstår problem, t.ex. simuleras inte nederbörd på ett verklighetstroget sätt i beräkningsprogrammet, det är problematiskt att olika definitioner används och frånvaro av tydliga riktlinjer kring ventilation ökar risken för att det missas eller startas för sent.

    En mätning utfördes även av den relativa fuktigheten i ett torkande bjälklag på projektet Berghus 3 i Liljeholmen i Stockholm. Mätningarna visade att betongen i princip inte torkar alls innan huset är tätt och värmen slagits på. Mätningarna visade även att torkklimatet i byggnaden endast under en kort period befinner sig inom det intervall som uttorkningen beräknats för.

    Det finns åtgärder för att motverka problem med torkningen uppstår. Genom att undvika nederbörd och stående vatten på bjälklagen får betongen bättre förutsättningar och kan torka snabbare. För att säkerställa att omgivningen uppfyller det som krävs för att betongen ska torka ut behöver torkklimatet kontrolleras och det behövs även en beredskap för hur torkinsatser ska ske vid för långsam torkning.

  • 36.
    Beskov, Björn
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Förbättrad informationshantering genom ett utvecklat rumsfunktionsprogram2010Independent thesis Basic level (professional degree), 30 credits / 45 HE creditsStudent thesis
  • 37.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Angående utlovade effekter av bestrykning med Termoskydd2011In: Bygg & teknik, ISSN 0281-658X, no 5, p. 54-55Article in journal (Other (popular science, discussion, etc.))
  • 38.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Smart homes - ett EU-projekt inriktat på energitjänster2005In: Bygg& teknik, ISSN 0281-658X, no 5, p. 58-62Article in journal (Other (popular science, discussion, etc.))
  • 39.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Takguide2005Report (Other academic)
  • 40.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Vad en grönyta kan betyda för tätskikts beständighet på låglutande tak2005In: Bygg & teknik, ISSN 0281-658X, no 4, p. 27-30Article in journal (Other (popular science, discussion, etc.))
  • 41.
    Björk, Folke
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Jóhannesson, Gudni
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Oberoende energiexpert, vad skall en sådan kunna?2006In: Bygg & teknik, ISSN 0281-658X, no 5, p. 57-61Article in journal (Other (popular science, discussion, etc.))
  • 42.
    Björk, Folke
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Kilkis, Siir
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Molinari, Marco
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Energy quality management and low energy architecture2012In: World Renewable Energy Forum, WREF 2012, Including World Renewable Energy Congress XII and Colorado Renewable Energy Society (CRES) Annual Conference, American Solar Energy Society , 2012, p. 4558-4564Conference paper (Refereed)
    Abstract [en]

    This paper puts forth energy quality management as the stepwise process of taking care of the quality of energy better. Energy quality can also be expressed as exergy, which measures the useful work potential of a given amount or flow of energy. Energy quality management is particularly useful to reduce the primary energy use in the built environment. This is achieved by reducing the heating and cooling demand, making use of passive building techniques, exploiting local renewable sources, and utilizing efficiently non-renewable energy. The application of the Rational Exergy Management Model further indicates how the integration of the building in the broader perspective of the community level is crucial to curb the building-related CO2 emissions. The paper concludes that exergy is a vital aspect for low energy and low CO2 emissions architecture.

  • 43.
    Björk, Folke
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Lövgren, Julia
    Mattsson, Sara
    Montage av fönster i kvarteret Blå Jungfrun: platsgjutna flerbostadshus med passivhusteknik2009In: Bygg & teknik, ISSN 0281-658X, no 8, p. 52-53Article in journal (Other (popular science, discussion, etc.))
  • 44.
    Björk, Folke
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Molinari, Marco
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Exergi - en kvalitetsfråga2009In: Bygg & teknik : Sveriges äldsta byggfacktidning, ISSN 0281-658X, no 5, p. 17-20Article in journal (Other (popular science, discussion, etc.))
  • 45.
    Björk, Folke
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Vrana, Tomas
    Forskningsarbete vid Byggvetenskap på KTH: Frost och kondens i mineralull2008In: Bygg & teknik : Sveriges äldsta byggfacktidning, ISSN 0281-658X, no 2, p. 57-60Article in journal (Other (popular science, discussion, etc.))
  • 46.
    Björnberg, Maja
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Krystek, Nicole
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Gröna tak – en nulägesanalays2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 47.
    Björnsdóttir, Jóhanna Eir
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Jóhannsson, Jóhann Björn
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Moisture Content and Mould Risk in Concrete Outer Walls2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Previous studies on the typical Icelandic external wall have shown thatcondensation occurs at the interior surface of the concrete and field inspectionshave supported this conclusion. The primary objective ofthis study is to analyse the hygrothermal behaviour of the typical Icelandicwall and evaluate the mould risk at the interior surface of theconcrete.A comparative study is performed to compare the hygrothermalperformance and mould growth risk of two concrete outer wall structureswith interior and exterior insulation, by performing a parametricstudy using the simulation program WUFI® Pro.Additional parametric studies are performed in order to analyse theeffect of various material properties of the Icelandic building materialson the hygrothermal behaviour of the wall. This part also utilizedWUFI® Pro.To investigate the thermal bridge of the Icelandic wall, simulationswere conducted with the COMSOL Multiphysics software to evaluatethe linear thermal bridge and the risk of condensation at the joint.Lastly, an experiment was set up at the Innovation Center Iceland tomodel the interior insulated wall-slab section. The experimental setupwas completed during this time but the results will be analysedfurther after the thesis work.The results from this study indicate that the typical Icelandic wall ismore sensitive to rain than to interior moisture load and that no condensationoccurs within the wall structure. As concrete is inorganic,the risk of mould growth in the wall structure is limited, however,with increased driving rain load the mould risk increases. The resultsalso revealed that the moisture content of the interior insulated wallwas a great deal higher compared to the exterior insulated wall. Furthermore,the humidity level at the interior surface of the concrete inthe interior insulated wall exceeded the recommended critical humiditylevel based on general suggestions. Finally, results indicated thatusing a more dense concrete resulted in higher relative humidity at theinterior surface but a lower total water content of the wall.

  • 48.
    Bjöör, Henrik
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Anpassning av passivhus för ett kallare klimat - teknisk och ekonomisk analys2008Independent thesis Basic level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 49.
    Bjöör, Tomas
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Kempe, Tobias
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Ytterväggar och bjälklag för flerbostadshus2004Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 50.
    Bomberg, Mark
    et al.
    Syracuse University.
    Thorsell, Thomas
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Energy Performance R-Value: Part 1 - Development of integrated evaluation methodology for building enclosures2008Conference paper (Refereed)
    Abstract [en]

    As a result of global increase in environmental awareness and the strive for reduction in energy consumption, it is only natural to look towards buildings as areas that need significant improvement to meet the society demand on reducing the energy use. After all, buildings consume more energy than cars. Yet the procedures that are used to define the thermal performance of, for example a wall, are typically based on the test performed on dry materials, without consideration of air and moisture movements. With other words these tests represent arbitrary rating conditions because we know that energy performance of materials and building assemblies is affected by moisture and air flows.

    This paper, in part 1, explains why the traditional testing with calibrated boxes is limited to comparative measurements of heat flow and proposes testing procedure that through a series of steps bridges the gap between the currently used R-value and energy performance rating. In the second part of the paper, an integrated testing and modeling methodology is applied to interacting effects of heat, air and moisture flows.

    In this way, these two papers report a key part of a project sponsored by an industrial consortium that was aiming in the development of performance indicator that closer reflects the thermal performance of an assembly under service conditions. In doing so, the current R-value serves as a baseline to which Rvalues measured in later steps are compared. These steps include R-value measured under two levels of air infiltration and wetting by infiltration of warm, moist air followed by a subsequent drying.

123456 1 - 50 of 256
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • 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