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集总参数模型是在初步方案阶段指导住区规划和设计、确保住区室外热环境质量的有效工具。考虑太阳辐射散射的影响及住区热时间常数的修正,本文提出改进绿色CTTC模型。对广州4绿化住区开展夏季室外热环境测试,得到住区空气温湿度和风速的逐时变化及气象站参数。通过实测数据分析,确定湿热地区常见树种的树木太阳辐射遮挡率为0.8,发现树木对流换热率在0~0.39之间随时间呈二次多项式关系变化。通过与实测数据对比,确认在无强烈平流换热情况下,改进绿色CTTC模型性能较改进前有显著提高,模型预测的平均值误差≤0.2℃,RMSE≤0.3℃,一致性指数≥0.98,可用于湿热地区绿化住区的室外气温预测。
The lumped parameter model is an effective tool to guide the planning and design of residential areas and ensure the outdoor thermal environment quality in residential areas in the initial program stage. Considering the influence of the scattering of solar radiation and the correction of thermal time constants in residential areas, this paper proposes to improve the green CTTC model. The summer outdoor thermal environment test was carried out on 4 green residential areas in Guangzhou, obtaining the hourly changes of temperature, humidity and wind speed of the residential areas and the weather station parameters. Through the analysis of measured data, the solar radiation shielding rate of the common tree species in hot and humid areas was determined to be 0.8, and it was found that the tree convective heat transfer rate varied from 0 to 0.39 with the quadratic polynomial relationship with time. Compared with the measured data, it is confirmed that the performance of the improved green CTTC model is improved significantly compared with that before the improvement without strong advection heat transfer. The average error of model prediction is ≤0.2 ℃, RMSE≤0.3 ℃, consistency index ≥0.98, available Prediction of Outdoor Temperature in Greening Residential Area in Humid and Hot Areas.