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供,大气压力的变化直接影响膨胀机的进出口压力。从前面分析知,大气压力的降低使为P进、P出,环境温度为T。则空压机的轴功率W可表示为:
For the change of atmospheric pressure directly affects the pressure of the expander’s import and export. From the previous analysis, we know that the reduction of atmospheric pressure causes P to enter and P out, and the ambient temperature is T. Then the air compressor shaft power W can be expressed as: