Building envelope analysis in terms of thermal stability in summer

Building envelope analysis in terms of thermal stability in summer

conference proceedings

Czech

Energy building design concept consists in controlling the thermo physical characteristics of the building envelope such as thermal transmittance (U-value) to name one example. However, besides the U-value, the envelope thermal inertia should also be considered because it helps to create indoor thermal comfort. Therefore, in situ measuring and dynamic thermal simulation was made. Simulated calculation results were validated by measuring. In the same model were created cases. These cases varied building envelope constructions, which had different materials and thickness, but they had the same U-value. The aim of this work was to compare simulated cases and to understand, how it works. It was found that the variation of outside temperature have no significant influence. Different performance of the building envelope constructions was seen only when heat gains were considered.

Energy building design concept consists in controlling the thermo physical characteristics of the building envelope such as thermal transmittance (U-value) to name one example. However, besides the U-value, the envelope thermal inertia should also be considered because it helps to create indoor thermal comfort. Therefore, in situ measuring and dynamic thermal simulation was made. Simulated calculation results were validated by measuring. In the same model were created cases. These cases varied building envelope constructions, which had different materials and thickness, but they had the same U-value. The aim of this work was to compare simulated cases and to understand, how it works. It was found that the variation of outside temperature have no significant influence. Different performance of the building envelope constructions was seen only when heat gains were considered.

lightweight construction, thermal stability, thermal inertia, time shift, thermal (heat) damping, decrement factor, numerical modeling.

lightweight construction, thermal stability, thermal inertia, time shift, thermal (heat) damping, decrement factor, numerical modeling.

HOFMAN, P.; ŽÁK, A.

18. 9. 2014

Faculty od Civil Enginering, Brno University of Technology

Brno

978-80-214-5003-5

enviBUILD 2014 - Buildings and Environment, International Conference proceedings

September 2014

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