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Comparison of measured and calculated temperature and relative humidity with varied and constant air flow in the facade air gap

Mundt Petersen, Solof LU and Harderup, Lars-Erik LU (2011) 9th Nordic Symposium on Building Physics, 2011 In Proceedings of the 9th Nordic Symposium on Building Physics - NSB 2011 1. p.147-154
Abstract
Calculation of relative humidity and temperature in an early stage of the design process is important to avoid moisture damages in wooden walls. Previous studies show that a sufficient air flow in the air gap behind the façade panel is important to ensure a moisture safe construction. This study investigates if blind WUFI 5.0 calculations with a varied air flow in the air gap behind the façade give a better correlation to measured values compared to calculations with a constant air flow. Calculations for two cases are compared to measured values in single family house. The results show that calculations with a wind dependent air flow does not necessary give better correlation to measured values compared to calculations with a constant air... (More)
Calculation of relative humidity and temperature in an early stage of the design process is important to avoid moisture damages in wooden walls. Previous studies show that a sufficient air flow in the air gap behind the façade panel is important to ensure a moisture safe construction. This study investigates if blind WUFI 5.0 calculations with a varied air flow in the air gap behind the façade give a better correlation to measured values compared to calculations with a constant air flow. Calculations for two cases are compared to measured values in single family house. The results show that calculations with a wind dependent air flow does not necessary give better correlation to measured values compared to calculations with a constant air flow. However, the calculated values are confirmed with measured values during the warm period and there are deviations in the outer part of the wall during the cold period. Variations in measured values at the same depth in different places in the studied wall are larger compared to differences between calculated values with or without a wind dependent air flow in the façade air gap. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Comparison, measurements, moisture, WUFI 5.0, calculations mould
in
Proceedings of the 9th Nordic Symposium on Building Physics - NSB 2011
editor
Vinha, Juha; Piironen, Jarkko and Salminen, Kati
volume
1
pages
8 pages
publisher
Tampere University of Technology
conference name
9th Nordic Symposium on Building Physics, 2011
ISBN
978-952-15-2574-2
language
English
LU publication?
yes
id
66f9dfb9-ed25-4cc6-acb2-778ca2cd9384 (old id 5218467)
date added to LUP
2015-03-28 08:43:46
date last changed
2016-04-16 07:43:23
@misc{66f9dfb9-ed25-4cc6-acb2-778ca2cd9384,
  abstract     = {Calculation of relative humidity and temperature in an early stage of the design process is important to avoid moisture damages in wooden walls. Previous studies show that a sufficient air flow in the air gap behind the façade panel is important to ensure a moisture safe construction. This study investigates if blind WUFI 5.0 calculations with a varied air flow in the air gap behind the façade give a better correlation to measured values compared to calculations with a constant air flow. Calculations for two cases are compared to measured values in single family house. The results show that calculations with a wind dependent air flow does not necessary give better correlation to measured values compared to calculations with a constant air flow. However, the calculated values are confirmed with measured values during the warm period and there are deviations in the outer part of the wall during the cold period. Variations in measured values at the same depth in different places in the studied wall are larger compared to differences between calculated values with or without a wind dependent air flow in the façade air gap.},
  author       = {Mundt Petersen, Solof and Harderup, Lars-Erik},
  editor       = {Vinha, Juha and Piironen, Jarkko and Salminen, Kati},
  isbn         = {978-952-15-2574-2},
  keyword      = {Comparison,measurements,moisture,WUFI 5.0,calculations mould},
  language     = {eng},
  pages        = {147--154},
  publisher    = {ARRAY(0x9e3c028)},
  series       = {Proceedings of the 9th Nordic Symposium on Building Physics - NSB 2011},
  title        = {Comparison of measured and calculated temperature and relative humidity with varied and constant air flow in the facade air gap},
  volume       = {1},
  year         = {2011},
}