Abstract Radiation heat in urban areas has detrimental effects on outdoor environments and building energy consumption. A better method for quantifying solar radiation in cities is very important. In order to compare the performance differences between three urban microclimate simulation softwires in the urban radiation field, ENVI-met, RayMan, and SOLWEIG were selected as the research objects. The output radiation parameters and the radiation calculation models were analyzed. Effects of underlying surface and enclosure modes of buildings on the radiation field were simulated separately. The differences in radiation field performance simulations of the three tools were compared from several aspects, including long-wave, short-wave, direct, and reflected radiation. It was found that all three softwires can calculate the effect of space enclosure on direct and diffuse radiation. RayMan has the highest sensitivity and fastest simulation speed, but it has few output radiation parameters, and it cannot simulate reflected radiation very well. ENVI-met can calculate the most radiation parameters and has the lowest errors; it can also calculate long- and short-wave radiation between building surfaces. SOLWEIG can be used for simulation in large outdoor spaces, but it has the highest errors.

中文翻译：

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三种微气候模拟工具城市辐射场性能对比

摘要 城市地区的辐射热对室外环境和建筑能耗具有不利影响。量化城市太阳辐射的更好方法非常重要。为了比较三种城市微气候模拟软线在城市辐射领域的性能差异，选择ENVI-met、RayMan和SOLWEIG作为研究对象。分析了输出辐射参数和辐射计算模型。分别模拟了下垫面和建筑物围护模式对辐射场的影响。从长波、短波、直接和反射辐射等几个方面比较了三种工具在辐射场性能模拟上的差异。发现所有三个软线都可以计算空间封闭对直接和漫射辐射的影响。RayMan具有最高的灵敏度和最快的模拟速度，但其输出辐射参数很少，不能很好地模拟反射辐射。ENVI-met可以计算出最多的辐射参数，并且具有最低的误差；它还可以计算建筑物表面之间的长波和短波辐射。SOLWEIG 可用于大型室外空间的模拟，但其误差最高。它还可以计算建筑物表面之间的长波和短波辐射。SOLWEIG 可用于大型室外空间的模拟，但其误差最高。它还可以计算建筑物表面之间的长波和短波辐射。SOLWEIG 可用于大型室外空间的模拟，但其误差最高。