中文摘要：

介绍了针对街谷空气温度预测的建筑群热时间常数模型的改进研究，通过分析原模型的不足，从二维模型向三维模型扩展、地表温度准确计算模型、长波辐射温降计算方法改进、乔木下长波辐射计算和绿地对流换热修正因子计算方法5方面进行改进。利用改进模型对广州某居住小区室外空气温度预测进行计算，结果表明预测与实测有较高的一致性，相关度为0．99。该模型可用于小区微气候规划设计和城市不同区域建筑能耗准确预测，具有重要意义。

英文摘要：

An improved CTFC （ Cluster Thermal Time Constant） model of predicting urban air temperature was presented. Based on the analysis of the deficiency of the existed CTFC model, five improvements were proposed, including the extension of two-dimensional model to three-dimensional mode, predicted method for surface temperature, improved method to calculate the contribution of net long wave radiation exchange to air temperature, method to calculate the long-wave radiation under the tree and method to calculate the heat transfer correct factor of green. The air temperature of a community in Guangzhou was predicted by using the improved CTI＇C model, and compared with the measured results, the results have shown that the model predicts the outdoor air temperature accurately and the correlation coefficient is up to 0.99. The improved CCTC model can be applied for the outdoor microclimate design and the energy use prediction of buildings.