冷凝水冷却双层玻璃幕墙模拟研究  

Simulation Study on Condensate Cooled Double Skin Facade

作　　者：郭玉润 刘俊红[1] GUO Yurun;LIU Junhong

机构地区：[1]山东建筑大学热能工程学院,山东济南250101

出　　处：《煤气与热力》2020年第5期19-25,J0042,J0043,共9页Gas & Heat

摘　　要：提出冷凝水冷却双层玻璃幕墙系统,这既是一种新的空调冷凝水利用方式,也是一种双层玻璃幕墙改良方案。将收集到的冷凝水通过水泵输送到进水管,自上而下地流过双层幕墙内表面,调节玻璃幕墙温度,降低建筑的空调负荷。建立物理模型和划分网格,利用Airpak软件进行模拟,对比讨论冷凝水冷却双层玻璃幕墙与普通双层玻璃幕墙的工作效果,以及冷凝水冷却双层玻璃幕墙不同空气夹层的进口风速、空气夹层厚度对整体的影响。在变进口风速与变夹层厚度两种情况下,冷凝水冷却双层玻璃幕墙的空气夹层平均温度均比普通双层玻璃幕墙低,约低2~5℃。在变进口风速情况下,普通双层玻璃幕墙的空气夹层平均温度随着进口风速的增大而下降,冷凝水冷却双层玻璃幕墙的空气夹层平均温度却随着进口风速的增大先下降后上升。在变夹层厚度情况下,普通双层玻璃幕墙的空气夹层平均温度随着夹层增厚变化不大,而冷凝水冷却双层玻璃幕墙的空气夹层平均温度随着夹层增厚逐渐上升。随着进口风速的增加,冷凝水冷却双层玻璃幕墙的最高温度不断降低,而空气夹层平均温度先下降后升高,且温度分布趋向均匀。一味地增大进口风速并不能使冷凝水冷却双层玻璃幕墙一直降温,若空气流速继续增大,将使空气夹层温度场趋于一致且继续升高,因此需要在保证温度降低的情况下控制进口风速。随着空气夹层厚度变大,冷凝水冷却双层玻璃幕墙空气夹层中的最高温度下降,而平均温度在缓慢上升。空气夹层过宽或过窄都会影响冷凝水冷却双层玻璃幕墙的使用效果,因此应使幕墙夹层厚度控制在合理的区间。The system of cooling double skin facade(DSF) with condensate is proposed,which is not only a new way of using condensate in air conditioning,but also a modified scheme of DSF. The collected condensate is transported to the water inlet pipe by a water pump,and flows through the inner surface of DSF from the top to the bottom to adjust the temperature of DSF and reduce the air conditioning load of the building.The physical model is built,the grid is divided,and the simulation is carried out by Airpak software. The working effects of the condensate cooled DSF and the ordinary DSF,and the influence of inlet wind speed and thickness of different air interlayer of the condensate cooled DSF are compared and discussed. The simulation results show that the average temperature of the air interlayer of the condensate cooled DSF is lower than that of the ordinary DSF by about 2 to 5 ℃ under the conditions of variable inlet wind speed and variable interlayer thickness. In the case of variable inlet wind speed,the average temperature of the air interlayer of the ordinary DSF decreases with the increase of the inlet wind speed,but the average temperature of the air interlayer of the condensate cooled DSF first decreases and then increases with the increase of the inlet wind speed. In the case of variable interlayer thickness,the average temperature of the air interlayer of the ordinary DSF does not change much with the increase of the interlayer thickness,while the average temperature of the air interlayer of the condensate cooled DSF gradually increases with the increase of the interlayer thickness.With the increase of the inlet wind speed,the maximum temperature of the condensate cooled DSF decreases continuously,while the average temperature of the air interlayer first decreases and then increases,and the temperature distribution tends to be uniform.Blindly increasing the inlet wind speed does not cool the condensate cooled DSF all the time. If the air flow rate continues to increase,the temperature field of the air inter

关 键 词：双层玻璃幕墙 冷凝水 数值模拟 空气夹层 进口风速 幕墙厚度 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]