Analysis of Emissivitys Influence on Inspection of Thermal DisFig.ments on Walls Surface
There are thermodynamic disFig.ments in buildings outer envelope of North residential buildings, which cause problems to energy efficiency buildings, such as going moldy, dewing, dripping water and so on. Using infrared imager to measure the temperature difference between the main body of the walls external surface and the walls defective areas, the temperature difference between the main body of the walls internal surface and its defective areas, we can realize quantitative diagnosis for buildings thermal disFig.ments. The results show that the emissivity of buildings surface selected in the handbooks can be used instead of accurate value, when the walls surface can be approximately considered as grey body and the emissivity is over 0.9. The error of temperature difference on the walls external surface and its internal surface caused by this approximation is no more than 5％. In he inspection of the indoor temperature difference, if the emissivity is in the normal scale (around 0.9), the effect caused by emissivity can be ignored. It is important that the same building should be fixed on the same emissivity 1 .
emissivity infrared inspection thermodynamic disFig.ment building envelope
FANG Xiumu WANG Zhonghua DING Zihu
Harbin Institute of Technology China Northeast Architectural Design & Research Institute
国际会议
北京
英文
2007-08-05（万方平台首次上网日期，不代表论文的发表时间）