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用热力学第二定律分析了两级压缩制冷系统中各部件的能量损失，并得出了不同中间温度（压力）所对应的制冷系数和■损失。
The second law of thermodynamics is used to analyze the energy loss of each component in the two-stage compression refrigeration system, and the cooling coefficient and loss corresponding to different intermediate temperature (pressure) are obtained.