The relative and absolute error equations of closures are deduced, which can be the reference of tracing ray quantities for solving the radiation transfer coefficient.
推导封闭腔内辐射传递系数的相对和绝对误差公式，为求解辐射传递系数所需追踪射线数量提供参考依据。
Secondly, testing the exterior wall's heating transfer coefficient in tier building, the differences between testing valve and design value is about 8.43%, and analysis the reason of the error.
其次对一栋多层建筑的外墙传热系数进行了测试，测试值和设计值相差8.43%，并分析了产生误差的原因。
Secondly, testing the exterior wall's heating transfer coefficient in tier building, the differences between testing valve and design value is about 8.43%, and analysis the reason of the error.
其次对一栋多层建筑的外墙传热系数进行了测试，测试值和设计值相差8.43%，并分析了产生误差的原因。
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