Numerical models for long-term performance assessment of lightweight insulating assemblies

This paper presents the results of numerical modelling of hygrothermal processes in test buildings situated in the Botanical garden of the University of Latvia. Long-term performance of wall, floor and ceiling insulating assemblies for five different buildings was simulated using WUFI Pro 6.3. On th...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-11, Vol.660 (1), p.12024
Main Authors: Birjukovs, M, Apine, I, Jakovics, A
Format: Article
Language:English
Subjects:
Assemblies
Building envelopes
Buildings
Ceilings
Climate models
Humidity
Laboratory tests
Mold growths
Numerical models
Performance assessment
Relative humidity
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Summary:This paper presents the results of numerical modelling of hygrothermal processes in test buildings situated in the Botanical garden of the University of Latvia. Long-term performance of wall, floor and ceiling insulating assemblies for five different buildings was simulated using WUFI Pro 6.3. On the experimental side, measurements of temperature and relative humidity at key points of assembles have been accumulated over a period of roughly six years and material samples were taken from building envelope materials for biological analysis. We found that our models rather successfully reproduce the experientially observed temperature and relative humidity dynamics. In the process, we established material models for building envelope components, as well as different parameters that we previously unknown. We also compared mould growth risk predictions via the Sedlbauer critical curve model derived from both simulations and experiment against the results of lab tests conducted on materials samples - all three were found to be in good agreement, indicating that the Sedlbauer model is applicable to local climate conditions, as well as further validating numerical models.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/660/1/012024