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《Sichuan Building Science》 2013-02
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The application of site test instrument with guard box for heat transfer coefficient of building envelope

MAI Yuebang,WU Peihao,LU Jianling(Guangdong Provincial Academy of Building Research,Guangzhou 510500,China)  
A site test instrument with guard box for heat transfer coefficient of building envelope was developed through theoretical analysis.And the temperature control accuracy in the guard box/cold box was studied.The results showed that: Firstly,the maximum temperature difference at different position in the guard box was 0.42℃,the maximum temperature fluctuation in the guard box was 0.57℃.Secondly,the maximum temperature difference at different position in the cold box was 0.53℃,the maximum temperature fluctuation in the cold box was 0.29℃.The stability and uniformity of air temperature in the guard box/cold box were better and the temperature control accuracy was higher.The site test instrument is not affected by ambient temperature,and has a good effect for temperature control in the actual application process,and has more stable result compared with the existing test instrument.At the same time it can get accurate result,and also the fluctuation of heat transfer coefficient is within 0.01 W /(m2·K).Therefore,the site test instrument applies to site test for the heat transfer coefficient of building envelope.
【CateGory Index】: TU111.4
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【Citations】
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【Co-citations】
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