【摘要】 通过构造一个逆劳伦兹循环来作为临界循环热泵的理想循环 ,以HFC12 5为例计算临界循环热泵的各部分不可逆损失 ,并与常规热泵进行了比较。在要求供水有较大温升的条件下 ,HFC12 5临界循环比常规循环的节流损失和高温换热损失要低得多 ,因此其循环的性能系数要比常规循环高 ,但其工作压力也较高。更多还原

【Abstract】 A Lorentz cycle as the idea cycle of the cri ti cal heat pump was created.It uses HFC125 as the refrigerant to calculate the irr eversible loss of the cycle parties of the critical heat pump. Comprising the tr aditional heat pump, the losses of the throttle and high temperature heat exchan ge of the HFC125 critical heat pump are lower than them when we require large he at water temperature difference. So the co-efficiency of critical cycle is high than the traditional cycle. But it has higher work pressure.更多还原