Refrigeration COP - Carnot & Actual

Coefficient of Performance of a vapour-compression cycle given evaporator and condenser temperatures, with Carnot reference.

RefrigerationCOPCarnot

Evap temperature°CCondenser temp°CMeasured / assumed COP

Carnot COP: 6.07 -

Second-law efficiency: 52.7%

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Formula, assumptions, and limits

COP_{Carnot} = \frac{T_e}{T_c - T_e}, \quad \eta_{II} = \frac{COP}{COP_{Carnot}}

Symbol	Meaning	Unit
$T_e$	Evaporator saturation temperature	K
$T_c$	Condenser saturation temperature	K
$COP$	Heat removed / work input

Source: ASHRAE Handbook - Refrigeration

In short

Coefficient of Performance of a vapour-compression cycle given evaporator and condenser temperatures, with Carnot reference.

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