双层皮玻璃幕墙热性能简化计算方法

Simplified calculation method for thermal performance of double skin facade

基于区域方法和气流网络方法,建立了自然通风双层皮幕墙(NVDSF)各控制区域的能量平衡方程和空腔气流模型.结合太阳辐射传递计算的混合算法,建立了NVDSF热性能的动态计算模型.在开发的动态计算模型基础上,将影响NVDSF热性能的参数分区段进行模拟,绘制参数性能表,提出插值计算NVDSF热性能的简化计算方法.以长沙市典型年份7月21日气象参数作为输入条件,采用两种计算方法分别计算NVDSF的辐射得热和对流得热.结果表明:两种方法的计算结果较接近,辐射得热最大相对误差≤0.5%,对流得热最大相对误差≤3%.

Based on the zonal and airflow network method,the energy balance equations and cavity airflow model for the control areas of the naturally-ventilated double skin facade(NVDSF) were established.Combined with the solar radiation transfer calculation method,a dynamic heat transfer calculation model of NVDSF was established.Based on the developed dynamic calculation model,the input parameters that affect the thermal performance of NVDSF were simulated in sections and which plotted in a parameter performance table.A simplified interpolation calculation method was developed to evaluate the thermal performance of NVDSF.The typical meteorological year parameters of Changsha on July 21 was used to compare the radiation heat gain and convective heat gain of the NVDSF calculated by two calculation methods.The results show that the two calculation methods have similar results.The relative error of the radiation and convective heat gain calculated by the two methods is within 0.5% and 3%,respectively.