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(一)简单单级蒸气压缩式制冷的理论循环计算 PowerPoint PPT Presentation


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(一)简单单级蒸气压缩式制冷的理论循环计算. 单级理论循环是建立在以下一些假设的基础上的:. ( 1 )压缩过程为等熵过程,即在压缩过程中不存在任何不可逆损失. ( 2 )在冷凝器和蒸发器中,制冷剂的冷凝温度等于冷却介质的温度,蒸发温度等于被冷却介质的温度,且冷凝温度和蒸发温度都是定值. ( 3 )离开蒸发器和进入压缩机的制冷剂蒸气为蒸发压力下的饱和蒸气,离开冷凝器和进入膨胀阀的液体为冷凝压力下的饱和液体. ( 4 )制冷剂在管道内流动时,没有流动阻力损失,忽略动能变化,除了蒸发器和冷凝器内的管子外,制冷剂与管外介质之间没有热交换.

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(一)简单单级蒸气压缩式制冷的理论循环计算

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