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A platform for research: civil engineering, architecture and urbanism
Predicting hygrothermal performance in cold roofs using a 1D transient heat and moisture calculation tool
https://orcid.org/0000-0002-2527-9306
Abstract 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 hygrothermal calculation tools in a reliable manner. Furthermore, general results and findings from blind validations of a transient heat and moisture calculation tool carried out in cold roofs 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 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. Measurements and calculations also established that the most moisture-critical conditions in general occurred in the tongued and grooved wooden roof boarding located under the roof membrane.
Highlights We study the possibilities to use calculation tools in the moisture safety design. We compare blindly calculated values with measured values. A clear correlation between blindly measured and calculated values was observed. Hygrothermal calculation tools could be reliable used in moisture safety design.
Predicting hygrothermal performance in cold roofs using a 1D transient heat and moisture calculation tool
https://orcid.org/0000-0002-2527-9306
Abstract 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 hygrothermal calculation tools in a reliable manner. Furthermore, general results and findings from blind validations of a transient heat and moisture calculation tool carried out in cold roofs 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 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. Measurements and calculations also established that the most moisture-critical conditions in general occurred in the tongued and grooved wooden roof boarding located under the roof membrane.
Highlights We study the possibilities to use calculation tools in the moisture safety design. We compare blindly calculated values with measured values. A clear correlation between blindly measured and calculated values was observed. Hygrothermal calculation tools could be reliable used in moisture safety design.
Predicting hygrothermal performance in cold roofs using a 1D transient heat and moisture calculation tool
https://orcid.org/0000-0002-2527-9306
Abstract 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 hygrothermal calculation tools in a reliable manner. Furthermore, general results and findings from blind validations of a transient heat and moisture calculation tool carried out in cold roofs 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 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. Measurements and calculations also established that the most moisture-critical conditions in general occurred in the tongued and grooved wooden roof boarding located under the roof membrane.
Highlights We study the possibilities to use calculation tools in the moisture safety design. We compare blindly calculated values with measured values. A clear correlation between blindly measured and calculated values was observed. Hygrothermal calculation tools could be reliable used in moisture safety design.
Predicting hygrothermal performance in cold roofs using a 1D transient heat and moisture calculation tool
Mundt-Petersen, S. Olof (author) / Harderup, Lars-Erik (author)
Building and Environment ; 90 ; 215-231
2015-04-05
17 pages
Article (Journal)
Electronic Resource
English
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