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分析比较了传统空调系统与近年来在欧洲出现并得到推广应用的置换通风空调系统的工作原理、特点及经济性。并采用k－ε双方程模型和SIMPLE算法，对互换通风空调系统室内二维气流的速度场、温度场和浓度场进行模拟，将模拟结果进行图形化处理显示，以进一步揭示置换通风空调系统室内的流动特性和温度分布规律，进而指出置换通风与冷却顶板结合的空调系统在提高人体热舒适性、改善室内空气品质、节能等方面具有很大的优越性。
The working principle, characteristics and economy of the traditional air conditioning system and the replacement ventilation and air conditioning system which have appeared in Europe and have been popularized and applied in recent years are analyzed and compared. The k-εtwo-equation model and SIMPLE algorithm are used to simulate the velocity field, temperature field and concentration field of indoor two-dimensional airflow in the exchangeable ventilation and air conditioning system. The simulation results are graphically processed and displayed to further reveal the performance of the displacement ventilation and air conditioning system Indoor flow characteristics and temperature distribution, and then pointed out that the replacement of ventilation and cooling roof combined with the air conditioning system in improving the thermal comfort of the human body, improve the indoor air quality, energy saving and so has great advantages.