平均辐射温度应用探讨
Discussion on application of mean radiant temperature
摘要：
介绍了平均辐射温度的定义及其与表面温度的关系，并通过实验比较了黑球温度计间接测量法、面积加权平均法和定义法计算结果的准确性。结果表明，与定义法相比，由定义法简化而来的面积加权平均法是一种粗略算法，使用时应注意其假设条件；黑球温度计间接测量法简单、应用普遍，但引入较多的测量误差，且该方法不适用于辐射温度不均匀或温度瞬时变化的环境。
Abstract：
Presents the definition of mean radiant temperature and its relationship with surface temperature, and compares the accuracy of calculation results by experiment with three methods including indirect measurement method with black globe thermometer, area weighted method and definition method. The results show that the area weighted method which is simplified from the definition method is rough during application, and the three hypothesizes must be paid attention to. Although the indirect measurement method with black globe thermometer is simple and widely applied, but the error is larger, and it’s not effective in the condition that the radiant temperature field is non-uniform or transient, because many measurement errors will be introduced during test.
Keywords:mean radiant temperature, surface temperature, black globe thermometer, area weighted method, angle factor