区域模型在高大中庭动态热环境模拟中的应用

Application of zonal model to dynamic simulation of thermal environment for large atrium

通过分析高大中庭气流运动及热环境特点,引入了温度基准区域模型,给出了其计算室内温度分布、实现动态模拟的方法。利用区域模型计算了上海某高大中庭温度分布,并将其计算结果与CFD模拟结果相比较,二者体现了较好的一致性。将区域模型应用于该中庭热环境的动态预测,比较了两种空调工况下室内的温度分布,结果显示,当排风口从中庭顶部移至中庭中部时,上部区域的温度梯度减小,排风口上下区域气流形成自循环,温度分布趋于均匀。

Based on the analysis of the thermal environment and air movement in large atrium, introduces the zonal model with the benchmark of temperature and presents the method to calculate the distribution of indoor temperature and to realize dynamic simulation.Applies the model to predict the thermal environment of a large atrium in Shanghai,and compares the result with that of CFD.The results show a consistent trend of temperature distribution.Applies the zonal model to simulate the dynamic environment of the atrium under two different air conditioning conditions.As a result,when the exhaust outlet is located at the middle height of atrium rather than the top of atrium,the temperature gradient of upper region is decreased,and self-circulated air stream is formed in the region higher and lower than the exhaust outlet resulting in more uniform temperature distribution.