The major factors effecting on the backpressure include atmospheric environment temperature, primary temperature difference of air-cooling, end difference of condensers.
影响其背压的主要因素有：大气环境温度、空冷初始温差、凝汽器的端差。
Analyses the effects of variable flow operation of primary pump water systems based on the temperature difference control method on the operation of air conditioning systems.
分析了一级泵水系统采用温差控制法实现变流量运行对空调系统运行的影响。
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