Show that COPheat pump COPref 1 A refrigerator using R12 h

Show that COP_heat pump = COP_ref + 1 A refrigerator using R-12 has an evaporator pressure of 1.826 bar, a condenser pressure of 7.449 bar and a condenser outlet temperature of 25degree C. The compressor power is 20 kW. (a) Determine the refrigerator COP. (b) Calculate the refrigerant mass flow rate.

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