通过分析说明，用对数平均温差法计算制冷冷凝器和蒸发器是不合理的。
The rationality of LMTD method applied in calculation of refrigeration condensers and evaporators is analyzed and proved to be unfit for the case.
用压差调节阀形成的压差克服蒸发器内制冷剂的流动阻力，把低压液体制冷剂超量供入蒸发器。
Using the pressure difference formed by pressure difference regulating valve, overcome flow resistance of refrigerant in evaporater, supply excess low pressure liquid refrigerant for evaporater.
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