风驱雨条件下湿热地区建筑双层表皮的蒸发降温潜力研究  

Evaporative Cooling Potential of Building Double Skin Facade in Hot and Humid Regions under Wind-Driven Rain

作　　者：何长苇 李丽[1] 郭凯 张继业[2] HE Changwei;LI Li;GUO Kai;ZHANG Jiye(School of Architecture and Urban Planning,Guangzhou University,Guangzhou 511400,China;School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;School of Physics and Materials Science,Guangzhou University,Guangzhou 511400,China)

机构地区：[1]广州大学建筑与城市规划学院,广州511400 [2]上海大学材料科学与工程学院,上海200444 [3]广州大学物理与材料科学学院,广州511400

出　　处：《建筑节能(中英文)》2025年第3期108-118,132,共12页Building Energy Efficiency

基　　金：广东省基础与应用基础研究基金资助项目(2020A1515011583)。

摘　　要：湿热地区所独有的气候特点使得建筑双层表皮可以利用蒸发降温技术提高自身性能并具有较大的节能潜力。选取外表皮倾斜角度和空气腔宽度作为建筑双层表皮构造的控制变量,采用数值软件进行热湿传递模拟,定量分析湿热地区建筑双层表皮的降温潜力。结果显示,运用蒸发降温技术的双层表皮表面温度显著下降,近表面处的空气相对湿度显著提高。在风驱雨条件下,蒸发降温双层表皮中倾角为90°的外表面可降温6.6℃,近表面处的空气相对湿度提高37.9%。风驱雨的降温作用至少相当于4 cm空气腔的宽度。考虑与不考虑风驱雨的双层表皮内表面处的平均空气相对湿度相差5.0%,雨后时间内两者差异最高可达13.0%。在风驱雨条件下,湿热地区蒸发降温双层表皮可以显著提高建筑围护结构的热湿性能,并作为有效降低建筑能耗的技术选择之一。Due to the distinctive climatic traits of hot and humid regions,the Double Skin Facade(DSF)of buildings can enhance its own performance and possess significant energy-saving potential through the utilization of evaporation cooling technology.The tilt angle of the outer skin and the width of the air cavity are designated as the control variables for the construction of the DSF,and the heat and humidity transfer are simulated by numerical software to quantitatively analyze the cooling potential of the DSF in hot and humid areas.The outcomes demonstrate that the surface temperature of the DSF drops significantly and the relative humidity of the air in proximity to the surface rises conspicuously.Under wind-driven rain circumstances,the outer surface of the evaporative cooling DSF with an angle of 90°can be cooled by 6.6℃,and the relative humidity near the surface can be increased by 37.9%.The cooling effect of wind-driven rain can be equivalent to at least 4 cm-wide air cavities.There is a 5.0%disparity in the average relative humidity of the air near the inner surface of the DSF with and without wind-driven rain,and the difference peaks at 13.0%after rain.Under wind-driven rain conditions,the evaporation-cooled DSF in hot and humid areas can notably improve the thermal and humidity performance of the building envelope and can be utilized as one of the technical alternatives to effectively reduce building energy consumption.

关 键 词：湿热地区 蒸发降温 双层表皮 传热传质 风驱雨 

分 类 号：TU111[建筑科学—建筑理论]