Improvement to the Radiant Time Factors under Different Air Volume Based on Experiment

L; Liugen; Huang Chen; Chen Jianchang; Li Li

doi:10.3969/j.issn.0253-4339.2015.01.059

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Improvement to the Radiant Time Factors under Different Air Volume Based on Experiment

更新时间：2024-07-18

- Improvement to the Radiant Time Factors under Different Air Volume Based on Experiment
- Journal of Refrigeration Vol. 36, Issue 1, (2015)
- 作者机构：
  
  上海理工大学环境与建筑学院
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2015.01.059
  CLC：
- Published：2015
- 稿件说明：
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L, Liugen, Huang Chen, et al. Improvement to the Radiant Time Factors under Different Air Volume Based on Experiment[J]. Journal of Refrigeration, 2015, 36(1).
DOI：

L, Liugen, Huang Chen, et al. Improvement to the Radiant Time Factors under Different Air Volume Based on Experiment[J]. Journal of Refrigeration, 2015, 36(1). DOI： 10.3969/j.issn.0253-4339.2015.01.059.

摘要

利用辐射时间因子，可方便计算辐射得热到辐射负荷的转化过程。在变风量工况下，实测环境室24个时刻的逐时得热和负荷，采用对流辐射分离方法计算24个时刻逐时辐射得热和辐射负荷，整理出相应的传递函数，通过构造系数矩阵，计算得到24项辐射时间因子。研究结果表明：提出的辐射时间因子计算方法合理可行；辐射时间因子第一项值随送风风量降低而减小，前五项值之和大于0.75，对于由ASHRAE软件计算的辐射时间因子，对前五项进行修正，即可用于不同空气循环类型房间辐射负荷的计算。

Abstract

The radiant time factors are used to calculate radiant cooling load in the radiant time series method. Based on measurement data of hourly heat gain and cooling load collected within 24 hours

radiant heat gain and radiant cooling load can be calculated by separating convection with radiation . Transfer function is obtained and a 24 term radiant time factors can be calculated by transfer function coefficients matrix. By comparing the results with experiment

it shows that the calculation method of radiant time factors is feasible. The first value of radiant time factors decreases as supply air volume decreases and the sum of the first five factors is more than 0.75. For the radiant time factors calculated by ASHRAE software

the improvement method can be used to calculate radiant cooling load under different air circulation after correcting the first five factors.

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