Finally the two points needing attention when putting an airprecoolingsystem into operation are given.
最后，指出空冷系统使用中需注意的两个方面。
2
The air conditioning energy consumption can be decreased by the waste heat of exhaust air recovered preheating or precooling the fresh air drawn in air conditioning system.
通过回收排气中的余热对引入空调系统的新风进行预热或者预冷，可以减少空调系统的能耗。
3
Analysis focuses on the reason for impurity concentration in closed-cycle nitrogen-water precoolingsystem of air separation unit. The solution to this problem is also presented.