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首页> 外文期刊>Building and Environment >CityComfort+: A simulation-based method for predicting mean radiant temperature in dense urban areas
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CityComfort+: A simulation-based method for predicting mean radiant temperature in dense urban areas

机译：CityComfort +：一种基于模拟的预测市区密集地区平均辐射温度的方法

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This paper introduces CityComfort+, a new method to simulate the spatial variation of the mean radiant temperature (T_(mrt)) in dense urban areas. This method derives the T_(mrt) by modeling five components of radiation fluxes-direct solar radiation, diffuse solar radiation, reflected solar radiation, long-wave radiation from the atmosphere, and long-wave radiation from urban surfaces-each weighted by view factors. The novelty of CityComfort+ lies in a new algorithm to model surface temperature and associated long-wave radiation as well as the application of RADIANCE, a ray-tracing algorithm that can accurately simulate 3-D radiation fluxes in a complex urban space (Ward, et al, 1998). CityComfort+ was evaluated in field studies conducted in a dense urban courtyard (mean sky view factor of 0.4) in Boston, Massachusetts, USA under winter, spring, and summer (cold, warm, and hot) weather conditions. Simulation results yielded close agreement with measured T_(mrt). Also, predicted mean surface temperature agreed well with the measurement data. A sensitivity test using CityComfort+ revealed that T_(mrt) on the study site will be mostly affected by the heat capacity and emissivity of surface material, not albedo. This study is subject to limitations from sensor accuracy and the thermal inertia of the grey ball thermometer, and the CityComfort+ method is still under development. The next step is to compare its performance with existing methods.
机译：本文介绍了CityComfort +，这是一种模拟密集城市地区平均辐射温度（T_（mrt））空间变化的新方法。该方法通过对辐射通量的五个分量建模来得出T_（mrt），即直接太阳辐射，漫射太阳辐射，反射太阳辐射，来自大气层的长波辐射以及来自城市表面的长波辐射，每个分量都由视图因子加权。 CityComfort +的新颖之处在于可以对表面温度和相关的长波辐射进行建模的新算法，以及可以精确模拟复杂城市空间中3D辐射通量的射线追踪算法RADIANCE的应用（Ward等人）等，1998）。在冬季，春季和夏季（寒冷，温暖和炎热）的天气条件下，在美国马萨诸塞州波士顿的一个密集城市庭院（平均天空视野系数为0.4）中进行了实地研究，对CityComfort +进行了评估。仿真结果与测得的T_（mrt）密切相关。另外，预测的平均表面温度与测量数据也很吻合。使用CityComfort +进行的敏感性测试表明，研究地点的T_（mrt）主要受表面物质的热容和辐射率的影响，而不是反照率。这项研究受到传感器精度和灰球温度计热惯性的限制，并且CityComfort +方法仍在开发中。下一步是将其性能与现有方法进行比较。

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