建筑一体化设计施工需求催生出越来越多阵列排布的外遮阳系统，其在立面尺度引发的风热遮蔽效应不容忽视。阵列的围合形态与非均一界面性质共同限制了太阳/长波辐射的传输，所形成的连续、小尺度半封闭腔体则会影响立面绕流的发展。若无法于热工计算中准确表征以上改变，阵列覆盖下的建筑冷热负荷预测精度便难以保证。因此，本项目拟以现场实测、模型实验和数值计算相结合的方法，开展对外遮阳阵列遮蔽效应及其热工特性的相关研究。在建立并验证立面风热微环境数理分析模型的基础上，探明建筑周边流场和表面辐射场自构件单元至立面整体的发展情况，提炼外界面换热系数和风压系数等热过程表征量的变化规律，并量化其与遮阳阵列物性特征参数间的映射响应关系，以之修正用于表征建筑得热、通风等过程的热工指标。项目拟从外部风热微环境变化的新角度深入揭示外遮阳阵列对建筑热过程的影响，完善围护结构热工分析理论，可为一体化外遮阳技术的正确推行提供理论支撑。

The requirement of building integration in design and construction in modern civilization propels the development of external sun-shading system with array configuration. The solar/infrared radiation is synchronously restricted by the array as its enclosed form and non-uniform interface characters, meanwhile, the evolution of façade-around flow is influenced under the semi-closed cavity formed by the array. If these variations can not be accurately interpreted, it will be difficult to accurately predict the heating/cooling load of a building with exterior shading arrays. Therefore, this project aims at adopting field measurement, scale model test and numerical calculation to investigate the shelter effect of the exterior shading arrays and its thermal characteristics. The simulation model to describe wind and thermal environment around the building façade will be established first. Then the development of the flow/radiation field around the building will be explored from shading device unit to the entire façade. Then the regularity of thermal characteristic values such as convective/radiatiive heat transfer coefficient and wind-pressure coefficient will be illustrated, and the correlations between these values and the physical property parameters of the shading arrays can be summarized to modify the thermal performance indexes to describe buildings’ heat gain/loss and ventilation. Therefore, the influence of shading device arrays on the load and energy consumption of HVA&C system could be precisely predicted. The project revealed how the exterior shading device influences building thermal process from a novel perspective: the variation of outside wind and thermal microenvironment, which completed the thermal performance analysis theory of the building envelope. The results can provide theoretical support for the application of building integrated external shading technology.