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暖通空调杂志社>期刊目次>2018年>第10期

重庆地区夜间通风条件下西外墙动态蓄热分析

Dynamic thermal storage analysis of west external wall on night ventilation in Chongqing

季文慧 罗 庆 王厚华
重庆大学

摘要:

针对重庆地区高温湿热的气候特征,提出采用贴附射流冷却墙体内壁面的方式进行夜间通风,并进行了实验测试和模拟分析。对比室外气象条件相近的无通风工况和采用贴附射流夜间通风工况的实测结果,分析了夜间通风对墙体壁面温度的影响。通过测试室外气象条件近似、通风速率相同、通风开启时刻不同的2个工况的数据,采用Fluent软件建立非稳态三维模型,计算了西外墙的热流密度和蓄热量。计算结果表明,该夜间通风方式可以有效降低墙体蓄热量。

关键词:夜间通风,蓄热,强迫对流,通风,测试

Abstract:

Considering the hot and humid climate condition in Chongqing, presents a novel night ventilation system using wall attachment jet to cool down the inner surface of walls, and performs an experiment and numerical analysis. Compares the actual results of non-ventilation condition with those of wall attachment jet night ventilation condition at the same outdoor air design condition. Analyses the influence of night ventilation on the surface temperature of the envelope. Tests the data of two conditions at similar weather conditions, same ventilation rate and different ventilation starting time, develops an unsteady 3D model by Fluent software, and calculates the heat density and thermal storage capacity of the west external wall. The calculation results show that the night ventilation method can effectively reduce the thermal storage of the wall.

Keywords:nightventilation,thermalstorage,forcedconvection,ventilation,test

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