The importance of a common method and correct calculation of thermal bridges

Björn Berggren; Maria Wall

The importance of a common method and correct calculation of thermal bridges

Björn Berggren, Maria Wall

Division of Energy and Building Design

Research output: Contribution to conference › Paper, not in proceeding › peer-review

Abstract

This paper elucidates the increased need of correct calculations of thermal bridges for low/near zero energy buildings. The variability of the results from calculations of transmission losses for a building can be large if the calculation method within EN ISO 13789:2007 is not fully understood. A survey has been carried out which shows that there are no consensus in Sweden regarding how to define the transmitting area for a 1-D building component as input for energy calculations and that there is confusion regarding the definition of thermal bridges. It seems that the most common misunderstanding regarding thermal bridges is that the geometrical effect; thermal bridges caused by the fact that they have different internal and external area. In order to
minimize the risk of misunderstanding of areas and thermal bridges should subscripts always be used.

Original language	English
Publication status	Published - 2011
Event	9th Nordic Symposium on Building Physics - Finland, Tampere, Finland Duration: 2011 May 29 → 2011 Jun 1 Conference number: 9 http://webhotel2.tut.fi/nsb2011/sites/webhotel2.tut.fi.nsb2011/files/b9_04_vahid_nik.pdf

Conference

Conference	9th Nordic Symposium on Building Physics
Abbreviated title	NSB2011
Country/Territory	Finland
City	Tampere
Period	2011/05/29 → 2011/06/01
Internet address	http://webhotel2.tut.fi/nsb2011/sites/webhotel2.tut.fi.nsb2011/files/b9_04_vahid_nik.pdf

Subject classification (UKÄ)

Building Technologies

Free keywords

Thermal bridges
EN ISO 13789
EN ISO 10211
energy
plus-energy
buildings

Access to Document

http://webhotel2.tut.fi/nsb2011/sites/webhotel2.tut.fi.nsb2011/files/c2_01_bjornberggren.pdf

1 Licentiate Thesis

Evaluating building envelopes for energy efficient buildings: Energy- and moisture performance considering future climate change
Berggren, B., 2013 Apr 1
Research output: Thesis › Licentiate Thesis

Open Access
File

Cite this

@conference{c0409403713a43c9a5e71bb4a7f107a1,

title = "The importance of a common method and correct calculation of thermal bridges",

abstract = "This paper elucidates the increased need of correct calculations of thermal bridges for low/near zero energy buildings. The variability of the results from calculations of transmission losses for a building can be large if the calculation method within EN ISO 13789:2007 is not fully understood. A survey has been carried out which shows that there are no consensus in Sweden regarding how to define the transmitting area for a 1-D building component as input for energy calculations and that there is confusion regarding the definition of thermal bridges. It seems that the most common misunderstanding regarding thermal bridges is that the geometrical effect; thermal bridges caused by the fact that they have different internal and external area. In order to minimize the risk of misunderstanding of areas and thermal bridges should subscripts always be used.",

keywords = "Thermal bridges, EN ISO 13789, EN ISO 10211, energy, plus-energy, buildings",

author = "Bj{\"o}rn Berggren and Maria Wall",

year = "2011",

language = "English",

note = "9th Nordic Symposium on Building Physics, NSB2011 ; Conference date: 29-05-2011 Through 01-06-2011",

url = "http://webhotel2.tut.fi/nsb2011/sites/webhotel2.tut.fi.nsb2011/files/b9_04_vahid_nik.pdf",

}

TY - CONF

T1 - The importance of a common method and correct calculation of thermal bridges

AU - Berggren, Björn

AU - Wall, Maria

N1 - Conference code: 9

PY - 2011

Y1 - 2011

N2 - This paper elucidates the increased need of correct calculations of thermal bridges for low/near zero energy buildings. The variability of the results from calculations of transmission losses for a building can be large if the calculation method within EN ISO 13789:2007 is not fully understood. A survey has been carried out which shows that there are no consensus in Sweden regarding how to define the transmitting area for a 1-D building component as input for energy calculations and that there is confusion regarding the definition of thermal bridges. It seems that the most common misunderstanding regarding thermal bridges is that the geometrical effect; thermal bridges caused by the fact that they have different internal and external area. In order to minimize the risk of misunderstanding of areas and thermal bridges should subscripts always be used.

AB - This paper elucidates the increased need of correct calculations of thermal bridges for low/near zero energy buildings. The variability of the results from calculations of transmission losses for a building can be large if the calculation method within EN ISO 13789:2007 is not fully understood. A survey has been carried out which shows that there are no consensus in Sweden regarding how to define the transmitting area for a 1-D building component as input for energy calculations and that there is confusion regarding the definition of thermal bridges. It seems that the most common misunderstanding regarding thermal bridges is that the geometrical effect; thermal bridges caused by the fact that they have different internal and external area. In order to minimize the risk of misunderstanding of areas and thermal bridges should subscripts always be used.

KW - Thermal bridges

KW - EN ISO 13789

KW - EN ISO 10211

KW - energy

KW - plus-energy

KW - buildings

M3 - Paper, not in proceeding

T2 - 9th Nordic Symposium on Building Physics

Y2 - 29 May 2011 through 1 June 2011

ER -

The importance of a common method and correct calculation of thermal bridges

Abstract

Conference

Subject classification (UKÄ)

Free keywords

Access to Document

Fingerprint

Research output

Evaluating building envelopes for energy efficient buildings: Energy- and moisture performance considering future climate change

Cite this