For heat-driven refrigeration cycles, or, more generally, for Carnot refrigeration cycles, COP can be expressed as:

Refrigeration effect C0P = p ; _ Energy input

Qout Qh


Heat input to the cycle (this is the heat removed from the conditioned space or process load, i.e., refrigeration effect)

Heat rejected by the cycle to the surrounding atmosphere

Referring back to Figure 33-1, area (3-b-a-4-3) Refrigeration effect

Work added and


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