Finally the two points needing attention when putting an air precooling system into operation are given.
最后，指出空冷系统使用中需注意的两个方面。
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。
Analysis focuses on the reason for impurity concentration in closed-cycle nitrogen-water precooling system of air separation unit. The solution to this problem is also presented.
分析了空分设备闭式循环氮水预冷系统杂质浓缩的原因，提出了处理措施。
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