The efficiency of a thermodynamic cycle is usually defined as the ratio between the useful energy, which is the purpose of the cycle, and the energy required to obtain the desired effect. In the case of refrigeration cycles, the objective is to produce a refrigeration effect with a low labor produced by the compressor in order to obtain a performance for which the system in regime must be paid.
The COP (performance coefficient) in a certain way measures the work done by the compressor as a function of the heat capacity removed from the evaporator, so it can be analyzed by dividing the cooling rate by the compression power.
