Change search
Refine search result
1 - 19 of 19
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • 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.
    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)
  • 2.
    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.

  • 3.
    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.

  • 4.
    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.

  • 5.
    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.

  • 6.
    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.

  • 7.
    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.

  • 8.
    af Klintberg, Tord
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Lind, Hans
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Building and Real Estate Economics.
    Krav på tillgänglighetsanpassning vid renovering: Ett diskussionsinlägg2016Report (Other (popular science, discussion, etc.))
  • 9.
    Björk, Folke
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Sustainable Buildings.
    af Klintberg, Tord
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Sustainable Buildings.
    Gudmundsson, Kjartan
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Sustainable Buildings.
    Simhallar – ett övergripande perspektiv på teknik, hälsa, beständighet och ekonomi2019Report (Other academic)
    Abstract [sv]

    Simhallar har olika problem, avseende både hälsoaspekter och beständighet. Dessutom förbrukar simhallar stora resurser ur ett ekonomiskt perspektiv. Neris-projektet har skaffat sig ett helikopterperspektiv på simhallars olika delar och risker och många av dessa risker orsakas av desinfektionen av badvattnet. I dagsläget så syftar hygien, rengöring och desinfektion främst till att hålla mikroorganismer på låga nivåer och det är viktigt att hygienen samt rengöringen optimeras. När det gäller desinfektionen av badvattnet så har klorering används under mycket lång tid, metoden är mycket effektiv för att döda de flesta mikroorganismerna, men orsakar även lungbesvär och korrosion som förkortar hallarnas livslängd.

    Denna rapport har inte hittat några vetenskapliga artiklar som belägger vilka kloreringsnivåer som bör tillämpas i en simhall. Dessa nivåer förefaller basera sig på tradition och på ett kunskapsläge då lungbesvär och korrosion inte beaktades. Det är tveksamt om exempelvis Folkhälsomyndighetens gränsvärden för klorhalter är grundade på ett spårbart sätt i vetenskapliga arbeten, som de bör vara.

    Det vore önskvärt att vetenskapligt undersöka vilka klornivåer som är tillräckliga och göra en sammansatt optimering med avseende på mikroorganismer, lungbesvär och korrosion.

    Blått ljus i simhall och fotokatalys i reningsverk  reducerar behovet av klorering, vilket har visats i Enskedehallens babysim. Vidare är det möjligt att få en bättre beskrivning av den mikrobiella situationen i badvatten med hjälp av partikelmätning, vilket kan minska de bakteriella riskerna i en simhall.  Dessa metoder bör bli föremål för vidare forskning.

    Hur stor är den sammanlagda korrosiviteten i en simhallsbyggnad? Det finns olika faktorer som samverkar i en simhall, som hög temperatur, högt fuktinnehåll i luften, klorider, underklorsyrlighet, och säkert fler faktorer, som inte är identifierade. Det är en forskningsuppgift att utföra olika metodtester för de olika delarnas korrosiva del och samverkande korrosivitet. Det finns inga rutiner för att avlägsna klorider som hamnat i simhallsrummet. Det vore bra att utarbeta sådana rutiner.  

    Det kan finnas ett motsatsförhållande mellan beständighet och energibesparing. Exempelvis så sparas energi om ett minimum av vatten blöder av, men detta ökar kloridkoncentrationen i badvattnet. På samma sätt ökas kloridkoncentrationen i simhallsbyggnaden om luften får gå i rundgång med ökad korrosionsrisk som följd.

    Avdunstningen är mycket energikrävande och det vore då intressant att minimera ventilationen över vattenytan. Den ventilationen är i dagsläget behövlig för att få bort skadliga gaser, exempelvis kloroform och trikloramin, som är en följd av kloreringen. Om klorering kan minska så kan även ventilationen över vattenytan minimeras, med energibesparing som följd

    Simhallsprojektet i Stad x riskerar att bli mellan 50 och 100 miljoner dyrare än vad som beräknades i förstudien. Förstudien har visat sig att vara optimistisk med avseende på fördelar, men svag med avseende på kostnader. Detta har försatt staden i en ekonomisk knipa, som riskerar att exempelvis materialval blir sämre med kortare beständighet som följd.. Förstudier inför ett simhallsbygge kan bli bättre. Det vore till exempel bra att göra en tredjepartskontroll med avseende på intäkter och kostnader.

    En kommun skulle kunna etablera en expertgrupp av kunniga tekniker och ekonomer som skulle kunna beakta och besluta över tekniska renoverings-, underhåll- och driftsfrågor. Detta vore en strategisk kunskap, som vore bra att ha in house.

  • 10.
    Gohardani, Navid
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Af Klintberg, Tord
    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.
    On An Operational Decision Making Methodology For Sustainable Building Refurbishment: A Case Study - Riksbyggen Workshop For RenovationIn: Building Research & Information, ISSN 0961-3218, E-ISSN 1466-4321Article in journal (Other academic)
  • 11.
    Gohardani, Navid
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Af Klintberg, Tord
    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.
    Turning building renovation measures into energy saving opportunities2015In: Structural Survey, ISSN 0263-080X, E-ISSN 1758-6844, Vol. 33, no 2, p. 133-149Article in journal (Refereed)
    Abstract [en]

    Purpose – The purpose of this paper is to promote energy saving measures concurrent with major planned renovation/refurbishment in residential buildings. Design/methodology/approach – The methodology comprises of case studies, in which the influence of various factors is identified on the overall decision making related to building renovation/refurbishment. Findings – The employed operational decision support process enables energy saving opportunities for residential buildings in conjunction with planned major renovations/refurbishments. Research limitations/implications – The research scope is confined to residential buildings in Sweden and cooperatives with tenants as the owners and governors. Practical implications – A novel approach to synergistic energy saving and renovation in residential buildings is exhibited. Social implications – The paper presents an altered viewpoint of energy renovation means for residential buildings in the built environment. Originality/value – The paper presents a novel approach for building owners to renovate a building in terms of improved performance, energy efficiency and indoor comfort in combination with planned renovations/refurbishments.

  • 12.
    Gudmundsson, Kjartan
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    af Klintberg, Tord
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Söderström, Ove
    The drying out capacity of a ventilated internal cavity with a heating cable, analytical model and empirical verification2012In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 52, p. 171-176Article in journal (Refereed)
    Abstract [en]

    This study is concerned with the use of interior air channels in walls for the drying out of surplus water in floor constructions. The floor is to be dried out by the means of an air gap, while a heating cable at the bottom of an adjacent wall channel provides a driving force for the flow. The model of this study can be used to quantify the drying out capacity of such a construction, given the geometrical configuration and the effect of the cable. By posing heat and mass balance equations for a star network equivalent to the delta network of the actual physical problem the temperature and moisture profiles for the floor channel are obtained. The wetted surface of the floor is assumed to be saturated, while the saturated moisture content varies with temperature along the surface. The temperature and moisture distributions along the air gap and the drying out capacity are obtained as a function of the flow rate. The physical problem of the wall channel is posed in terms of the governing equations of conservation. The Boussinesq approximation is used to restrict the variation in density to that of the gravitational force. The buoyancy generated by the cable is related to the frictional forces of the channel walls, providing a relationship between the flow rate and the effect of the cable. The analytical results are compared with laboratory measurements and show good agreement for a number of different heights of the air gap in the floor.

  • 13.
    Hjortling, Camilla
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology. Vattenfall AB, Sverige.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Berg, Magnus
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology. Vattenfall AB, Sverige.
    af Klintberg, Tord
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology. Vattenfall AB, Sverige.
    Energy mapping of existing building stock in Sweden - Analysis of data from Energy Performance Certificates2017In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 153, p. 341-355Article in journal (Refereed)
    Abstract [en]

    This study contributes to defining the current energy consumption baseline for buildings in Sweden. The data used for the analysis are extracted from the database of the Swedish National Board of Housing, Building and Planning and consists of 186,021 measured energy performance certificates issued for commercial buildings (355 Mm(2)), collected during 2007-2015. The results from this study for certain building types, construction periods, climate zones and energy use is presented. Building codes have influence of the buildings energy performance. When new building codes have been adopted and energy performance requirement been stricter the measured energy consumption have been lowered compared to buildings built earlier. New buildings have nevertheless often higher energy consumption than stipulated by the building code. Climate zone have less impact on energy consumption than type of building. Building units in the warmer climate zones generally have slightly lower energy consumption than those in colder zones. This implies that the buildings are well adapted to the climates at hand. The results may help public authorities to plan future business strategies and energy policies. The Swedish Energy Performance Certificates are quite reliable because they are based on energy bills and not on theoretical calculations.

  • 14.
    Kharazmi, Parastou
    et al.
    KTH, School of Architecture and the Built Environment (ABE).
    Björk, FolkeKTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.af Klintberg, TordKTH.
    Relining in domestic wastewater pipeline in Sweden2015Conference proceedings (editor) (Other academic)
    Abstract [en]

    Pipeline rehabilitation by relining materials and techniques is a solution towards degradation problem of the old pipeline instead of complete replacement. The prepared poster and paper provide a summary of the advances in technology, methods and materials of relining techniques and the important considerations such as cleaning, inspection and working environment in Sweden which is similar to the methods and considerations in other Nordic countries. This paper also includes result from a survey conducted by KTH Royal Institute of Technology regarding client’s point of view from 15000 apartments with relined pipe. The main conclusion of the interview survey was that relining has worked satisfactory in most of the cases and majority of the clients in the study have been satisfied and are willing to use relining again.

  • 15.
    Lind, Hans
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Building and Real Estate Economics.
    Annadotter, Kerstin
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Building and Real Estate Economics.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Högberg, Lovisa
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Building and Real Estate Economics.
    Af Klintberg, Tord
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Sustainable Renovation Strategy in the Swedish Million Homes Programme: A Case Study2016In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 8, no 4, article id 388Article in journal (Refereed)
    Abstract [en]

    Sweden has a large multifamily housing stock that was built between 1960 and 1975. An important current issue is how this stock can be renovated in a sustainable way. The article analyses a strategy used by a suburban municipal housing company that had clear social ambitions and offered the tenants three options of renovation: Mini, Midi and Maxi. Most tenants chose the Mini alternative which meant that they could afford to stay and that there was no increase in costs for the social authorities. An investment analysis showed that the Mini alternative had a positive net present value, but that the Midi and Maxi alternatives were more profitable. Even though there was no clear environmental focus in the renovation, energy use was reduced by 8%. As a conclusion, the study shows that a sustainable renovation is possible but that there are a number of conflicts between the different dimensions of sustainability.

  • 16.
    Lind, Hans
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Building and Real Estate Economics.
    Annadotter, Kerstin
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Building and Real Estate Economics.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Högberg, Lovisa
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Building and Real Estate Economics.
    af Klintberg, Tord
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Sustainable renovation strategy in the Swedish Million HomesProgramme: A case study2014Report (Other academic)
  • 17.
    Lind, Hans
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Building and Real Estate Economics.
    Högberg, Lovisa
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Building and Real Estate Economics.
    af Klintberg, Tord
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Björk, Folke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Knivstamodellen BoKvar för renovering av bostäder: Hur man kan få en vettig avvägning mellan insatser och hyreshöjning2016Report (Other (popular science, discussion, etc.))
  • 18.
    Sommerfeldt, Nelson
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    af Klintberg, Tord
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Muyingo, Henry
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management.
    Kristoffersson, Jan
    Sustainable Innovation.
    Solceller ur flera perspektiv: Handbok för beslutsfattare2016Report (Other (popular science, discussion, etc.))
    Abstract [sv]

    För att ta fram denna handbok har flera kompetenser på KTH inom energiteknik, byggnadsteknikoch ekonomi samverkat för att bearbeta solcellsfrågan vetenskapligt ur flera perspektiv. Dennahandbok tar alltså ett multidisciplinärt grepp på solceller. Handboken vänder sig speciellt till bostadsrättsföreningar då det finns speciella problem, menäven särskilda möjligheter för dessa ägare. Många frågeställningar är dock gemensamma för fleratyper av solcellsägare, exempelvis småhusägare och flerbostadsägare.

  • 19.
    Sommerfeldt, Nelson
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Muyingo, Henry
    KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management.
    af Klintberg, Tord
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Björk, Folke (Commentator for written text)
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Madani, Hatef (Contributor)
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Photovoltaic Systems for Swedish Prosumers: A technical and economic analysis focused on cooperative multi-family housing2016Report (Other academic)
    Abstract [en]

    This report is designed to be a comprehensive information resource for Swedish prosumers considering an investment in solar PV systems. The target audience are multi-family cooperative houses, however much of the information is applicable to other building owners and solar energy more broadly. The primary question to be answered; is a rooftop PV investment profitable in Sweden? Naturally there are many variables that can affect the answer; therefore a Monte Carlo methodology is used to convert the uncertainties into risks, where the results can be presented as probabilities rather than a vast collection of sensitivity analyses. Several policy scenarios are tested, where the relative impact of each current program on profitability can be seen.

1 - 19 of 19
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • 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