玻璃幕墙热通道内气流组织的模拟与分析

Simulation and analysis of air distribution inside heat passage of glass curtain walls

用有限元分析软件ANSYS对上海第一人民医院病房玻璃幕墙热通道分别采用自然通风和机械通风时的流场与温度场进行了模拟分析,发现无法实现自然通风,而机械通风不仅可以使幕墙内通风效果大大增强,同时可以节能。为该医院病房玻璃幕墙热通道实现自然通风提出了改进措施,模拟得出在距外壁0.8m左右处安装一内层玻璃时出风口气流速度能达到2.3m/s左右,可有效地把热量带出。在与该医院玻璃幕墙模型相同的边界条件和相同幕墙高度条件下,对不同宽度和不同进出风口高度的情况进行了模拟,得出最佳设计尺寸为宽度1·4m、进出风口高度0.35m左右。

With finite element analysis software ANSYS, simulates the flow field and the temperature field inside the heat passage of glass curtain wall applying natural ventilation and mechanical ventilation for the ward building in Shanghai First People＇s Hospital, and finds that natural ventilation effect can not be realized and that applying mechanical ventilation can achieve good ventilation effect and save energy. For improving natural ventilation effect, proposes setting an inner glass at a distance of about 0.8 m from the external wall, and simulation results show that air outlet velocity can reach about 2.3 m/s and heat can be effectively removed from curtain wall. Simulates the velocity and temperature fields inside glass curtain walls with various widths of curtain wall and heights of air .inlet and outlet under the condition of the same boundary and curtain wall height as the above model, considers the curtain wall width of 1.4 m and the air inlet and outlet height of about 0.35 m optimal design dimensions.