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

Berggren, Björn LU and Wall, Maria LU (2011) 9th Nordic Symposium for Building Physics
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.... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to conference
publication status
published
subject
keywords
Thermal bridges, EN ISO 13789, EN ISO 10211, energy, plus-energy, buildings
conference name
9th Nordic Symposium for Building Physics
language
English
LU publication?
yes
id
c0409403-713a-43c9-a5e7-1bb4a7f107a1 (old id 3515942)
alternative location
http://webhotel2.tut.fi/nsb2011/sites/webhotel2.tut.fi.nsb2011/files/c2_01_bjornberggren.pdf
date added to LUP
2014-03-06 11:21:14
date last changed
2016-04-16 12:18:05
@misc{c0409403-713a-43c9-a5e7-1bb4a7f107a1,
  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 <br/><br>
minimize the risk of misunderstanding of areas and thermal bridges should subscripts always be used.},
  author       = {Berggren, Björn and Wall, Maria},
  keyword      = {Thermal bridges,EN ISO 13789,EN ISO 10211,energy,plus-energy,buildings},
  language     = {eng},
  title        = {The importance of a common method and correct calculation of thermal bridges},
  year         = {2011},
}