miun.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
The impact of the shape factor on final energy demand in residential buildings in nordic climates
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik och hållbar utveckling. (Ekoteknik)ORCID-id: 0000-0001-5356-7471
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik och hållbar utveckling. (Ekoteknik)
SWECO, Vastra Norrlandsgatan 10 B, Umea, SE 901 03, Sweden.
2012 (Engelska)Ingår i: World Renewable Energy Forum, WREF 2012, Including World Renewable Energy Congress XII and Colorado Renewable Energy Society (CRES) Annual Conference, 2012, s. 4260-4264Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
Abstract [en]

The shape factor of a building is the ratio between its envelope area and its volume. Buildings with a higher shape factor have a larger surface area in proportion to their volume, which results in larger heat losses in cold climates. This study analyzes the impact of the shape factor on the final energy demand by using five existing apartment buildings with different values of shape factor. Each building was simulated for twelve different scenarios: three thermal envelope scenarios and four climate zones. The differences in shape factor between the buildings were found to have a large impact and accounted for 10%-20% of their final energy demand. The impact of the shape factor was reduced with warmer climates and ceased with average outdoor temperature 11ºC-14ºC depending on the thermal envelope performance of the buildings.

Ort, förlag, år, upplaga, sidor
2012. s. 4260-4264
Nyckelord [en]
Apartment buildings; Cold climate; Final energy; Outdoor temperature; Residential building; Shape factor; Surface area
Nationell ämneskategori
Husbyggnad Arkitekturteknik Naturresursteknik
Identifikatorer
URN: urn:nbn:se:miun:diva-16426Scopus ID: 2-s2.0-84871535260ISBN: 978-162276092-3 (tryckt)OAI: oai:DiVA.org:miun-16426DiVA, id: diva2:532979
Konferens
World Renewable Energy Forum, WREF 2012, Including World Renewable Energy Congress XII and Colorado Renewable Energy Society (CRES) Annual Conference;Denver, CO;13 May 2012through17 May 2012;Code94564
Projekt
Hållbara utvecklingsprocesserTillgänglig från: 2012-06-12 Skapad: 2012-06-12 Senast uppdaterad: 2018-12-20Bibliografiskt granskad
Ingår i avhandling
1. Energy efficiency of new residential buildings in sweden: Design and Modelling Aspects
Öppna denna publikation i ny flik eller fönster >>Energy efficiency of new residential buildings in sweden: Design and Modelling Aspects
2014 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Energy security and climate change mitigation have been discussed in Sweden since the oil crisis in the 1970s. Sweden has since then increased its share of renewable energy resources to reach the highest level among the EU member states, but is still among the countries with the highest primary energy use per capita. Not least because of that, increasing energy efficiency is important and it is part of the Swedish long term environmental objectives. Large potential for improving energy efficiency can be found in the building sector, mainly in the existing building stock but also in newly constructed buildings

In this thesis, criteria for energy efficiency in new residential buildings are studied, several design aspects of residential buildings are examined, and possible further analysis from an energy system perspective discussed. Three case studies of existing residential buildings were analysed, including one detached house and multi-storey apartment buildings. The analysis was based on both energy simulations and measurements in residential buildings.

The results show that the calculated specific final energy demand of residential buildings, before they are built, is too rough an indicator to explicitly steer society toward lower final energy use in the building sector. One of the reasons is assumptions made during calculation before the buildings is built. Another reason is the interior building design. A design that includes relatively large areas of heated corridors, service and storage rooms will lower the specific final energy demand without improving the building energy efficiency, which might increase both the total final energy demand and the use of construction materials in the building sector.

Efficient thermal envelopes are essential in construction of energy efficient buildings, which include the thermal resistance and also the shape of the building. The shape factor of buildings was found to be an important variable for heat demand in buildings located in temperate and colder climates, particularly if they are exposed to strong winds.

From a system perspective, energy efficiency measures and the performance of the end use heating technology in buildings should be evaluated together with the energy supply system, including the dynamic interaction between them.

Ort, förlag, år, upplaga, sidor
Östersund: Mid Sweden University, 2014. s. 46
Serie
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 105
Nationell ämneskategori
Miljövetenskap
Identifikatorer
urn:nbn:se:miun:diva-21933 (URN)978-91-87557-10-1 (ISBN)
Presentation
2014-05-05, Q 221, Akademigatan 1, Östersund, 10:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2014-05-16 Skapad: 2014-05-13 Senast uppdaterad: 2018-12-20Bibliografiskt granskad
2. Energy performance of residential buildings: projecting, monitoring and evaluating
Öppna denna publikation i ny flik eller fönster >>Energy performance of residential buildings: projecting, monitoring and evaluating
2016 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Energy security and climate change mitigation have been discussed in Sweden since the oil crisis in the 1970s. Sweden has since then increased its share of renewable energy resources to reach the highest level among the EU member states, but is still among the countries with the highest primary energy use per capita. Not least because of that, increasing energy efficiency is important and it is part of the Swedish long term environmental objectives. Large potential for improving energy efficiency can be found in the building sector, mainly in the existing building stock but also in new constructions.

Buildings hold high costs for construction, service and maintenance. Still, their energy efficiency and thermal performance are rarely validated after construction or renovation. As energy efficiency become an important aspects in building design there is a need for accurate tools for assessing the energy performance both before and after building construction. In this thesis criteria for energy efficiency in new residential buildings are studied. Several building design aspects are discussed with regards to final energy efficiency, energy supply-demand interactions and social aspects. The results of this thesis are based on energy modelling, energy measurements and one questionnaire survey. Several existing residential buildings were used as case studies.

The results show that pre-occupancy calculations of specific final energy demand in residential buildings is too rough an indicator to explicitly steer towards lower final energy use in the building sector. Even post occupancy monitoring of specific final energy demand does not always provide a representative image of the energy efficiency of buildings and may result with large variation among buildings with similar thermal efficiency. A post occupancy method of assessing thermal efficiency of building fabrics using thermography is presented. The thermal efficiency of buildings can be increased by design with low shape factor. The shape factor was found to have a significant effect on the final energy demand of buildings and on the use of primary energy. In Nordic climates, atria in multi-storey apartment buildings is a design that have a potential to increase both energy efficiency (by lower shape factor) and enhance social interactions among the occupants.

Ort, förlag, år, upplaga, sidor
Östersund: Mittuniversitetet, 2016. s. 62
Serie
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 238
Nationell ämneskategori
Energisystem Arkitekturteknik Husbyggnad Miljöanalys och bygginformationsteknik
Identifikatorer
urn:nbn:se:miun:diva-27175 (URN)978-91-88025-52-4 (ISBN)
Disputation
2016-02-23, G1352, Östersund, 11:04 (Engelska)
Opponent
Handledare
Tillgänglig från: 2016-03-04 Skapad: 2016-03-03 Senast uppdaterad: 2018-12-20Bibliografiskt granskad

Open Access i DiVA

fulltext(129 kB)530 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 129 kBChecksumma SHA-512
d606a9946b5f30e551f93d16b495ec75ef5dad1d8173690d9d8414ead13c827a107db52474c252d5551930e05dd493ced9b24ed065d20d2fccc8d850434e49bd
Typ fulltextMimetyp application/pdf

Övriga länkar

Scopushttp://ases.conference-services.net/resources/252/2859/pdf/SOLAR2012_0428_full%20paper.pdf

Personposter BETA

Danielski, ItaiFröling, Morgan

Sök vidare i DiVA

Av författaren/redaktören
Danielski, ItaiFröling, Morgan
Av organisationen
Institutionen för teknik och hållbar utveckling
HusbyggnadArkitekturteknikNaturresursteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 530 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

isbn
urn-nbn

Altmetricpoäng

isbn
urn-nbn
Totalt: 1287 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf