Validation of a 1D transient heat and moisture calculation tool under real conditions
Author
Editor
- Richard Karney
- Andre Desjarlais
Summary, in English
Stricter Swedish building regulations require a moisture-safety design process to be carried out before houses are built. In order to predict moisture-critical conditions, a properly verified, user-friendly and reliable calculation tool that could be used in this design phase, is required.
This paper initially presents a blind method that could be used in order to verify heat and moisture calculation tools in a reliable manner. Furthermore, general results and findings from blind validations using a transient heat and moisture calculation tool are summarized and presented.The comparisons include measurements and calculations of temperature and relative humidity and were carried out in northern European climates.
In general, the results show a good correlation between measured and blindly-calculated values. Comparisons show that the studied tool can be used during the design phase to predict moisture risks. However, factors such as the influence of impaired-temperature measurements on relative humidity have to be taken into account. There is also a need for outdoor climate-boundary conditions that take into account critical periods.Measurementsandcalculations also established that themostmoisture-critical conditions ingeneral occurred in the exterior part of the frame, behind the air gap.
This paper initially presents a blind method that could be used in order to verify heat and moisture calculation tools in a reliable manner. Furthermore, general results and findings from blind validations using a transient heat and moisture calculation tool are summarized and presented.The comparisons include measurements and calculations of temperature and relative humidity and were carried out in northern European climates.
In general, the results show a good correlation between measured and blindly-calculated values. Comparisons show that the studied tool can be used during the design phase to predict moisture risks. However, factors such as the influence of impaired-temperature measurements on relative humidity have to be taken into account. There is also a need for outdoor climate-boundary conditions that take into account critical periods.Measurementsandcalculations also established that themostmoisture-critical conditions ingeneral occurred in the exterior part of the frame, behind the air gap.
Department/s
Publishing year
2013
Language
English
Publication/Series
[Host publication title missing]
Full text
Document type
Conference paper
Topic
- Building Technologies
Keywords
- Wood frame walls
- Blind validation
Conference name
Thermal Performance of the Exterior Envelopes of Whole Buildings XII
Conference date
2013-12-01
Conference place
Clearwater, Florida, United States
Status
Published
ISBN/ISSN/Other
- ISBN: 978-1-936504-61-9