| 摘要: |
| 为解决目前常用评估室外平均辐射温度(Mean radiant temperature,MRT)的黑球温度计法的观测缺陷,提高夏热冬暖地区室外辐射热环境估算精度,提出了一种针对黑球温度计法估算MRT的直接修正方法。首先,在广州采用六向辐射法对3种不同下垫面场地的辐射特征进行了观测和分析,明确了下垫面反照率对辐射环境的影响。其次,根据六向辐射法和黑球温度计法的估算结果和统计分析,确定了50、150 mm规格黑球温度计合适的响应时间分别为5、20 min。最后,验证了直接修正方法的地区适用性。以观测方法估算MRT的统计结果为依据,构建了不同气候条件下两种规格黑球温度计法的多项式修正模型,在相应天气条件验证了模型准确性。研究结果表明:直接修正方法适用于相同气候条件区域；根据不同天气条件回归函数修正后的黑球温度计法MRT与六向辐射法MRT之间的拟合方程、决定系数R2和均方根误差RMSE均得到较大程度改善,两种规格黑球的偏差范围分别改善61.35%和68.71%。本研究可为广州为代表的夏热冬暖地区室外辐射环境估算提供理论依据。 |
| 关键词: 夏热冬暖地区 室外平均辐射温度 响应时间 六向辐射法 黑球温度计 |
| DOI：10.11918/202101123 |
| 分类号:TU111;TU119 |
| 文献标识码:A |
| 基金项目:国家重点研发计划(2020YFE0200300)；国家自然科学基金(6,7)；广州市科技计划项目(2020020030261) |
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| Correction of outdoor mean radiant temperature estimation in hot summer and warm winter zone |
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TANG Peijie1,2,LI Qiong1,2
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(1.School of Architecture, South China University of Technology, Guangzhou 510640, China; 2.State Key Laboratory of Subtropical Building Science (South China University of Technology), Guangzhou 510640, China)
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| Abstract: |
| A direct correction method for estimating the outdoor mean radiant temperature (MRT) with black globe thermometer method was proposed to solve the observation defects of the traditional black globe thermometer method and improve the estimation accuracy of the outdoor radiant environment in hot summer and warm winter zone. First, the six-directional radiation method was used to observe and analyze the radiation characteristics of three different underlying surface sites in Guangzhou, and the effect of the underlying surface albedo on the radiation environment was clarified. Then, the estimation results of the six-directional radiation method and the black globe thermometer method were compared, and the suitable response periods of 50 mm and 150 mm black globe thermometers were determined to be 5 min and 20 min respectively. Finally, the regional applicability of the direct correction method was verified. On the basis of the statistical results of the two observation methods for estimating MRT, a polynomial correction model was constructed for two specifications of the black globe thermometer method under different weather conditions, and the accuracy of the model was verified in the corresponding weather. Research results show that the direct correction method was suitable for regions with the same climatic conditions, and the fitting equation, the coefficient of determination (R2), and the root mean square error (RMSE) between the six-directional radiation method and the black globe thermometer method modified according to the regression function of different weather conditions were greatly improved. The deviation ranges of the two specifications of black globe thermometers were improved by 61.35% and 68.71% respectively. This study can provide a theoretical basis for the estimation of outdoor radiation environment in hot summer and warm winter zone represented by Guangzhou. |
| Key words: hot summer and warm winter zone outdoor mean radiant temperature response time six-directional radiation method black globe thermometer |
