暖通空调流通区域的数值模拟与仿真

Modeling and Simulation of Heating Ventilation and Air Conditioning

随着人们对暖通空调系统要求不断地提高,其规模不断增大,而空调能耗也在不断增加。探究暖通空调流通区域内的流动形态和温度分布规律,为达到合理安排空调线路并降低能耗。建立暖通空调流动区域的三维模型,运用仿真软件fluent,对不同方式入口条件下的流通区域进行数值模拟分析。通过对计算结果的分析,得到了流通区域内空气流动形态及温度的分布规律和变化规律。研究结果为暖通空调系统的合理布局并最终能耗降低提供了参考。

The flow and temperature fields in an air-conditioned,three-storey officebuilding were mathematical-ly modeled,theoretically analyzed and numerically simulated with Fluent.The impact of the cooling-air inlet orienta-tion,including the top-down at 90°/45°and in the wall at 90°/45°,on the profilesof temperature and flow fields was investigated.The simulated results show that the inlet orientation significantly affects the profiles of temperature and air-flow fieldsin circulation area.For example,the temperature close to the walls is higher than that （~26℃） in the room center.Cooling down for 2 s decreases the temperature difference from 10℃to 2℃.The air coming in at 90° produces an observable vertical temperature profile;whereas that at 45°makes a little temperature difference along the wall.We suggest that the simulated results be of some technological interest in air-conditioner installation.