4. (a) Draw a P-V diagram of a real refrigerator that uses 1 kg of HFC-134a...

4. (a) Draw a P-V diagram of a real refrigerator that uses 1 kg of HFC-134a as the working fluid.
Identify the compressor. condenser. throttle and the evaporator stages of the cycle and indicate
where heat Qc, is extracted from the cold refrigerator and where. Qa is released to the
environment. Also indicate where the refrigerant is in liquid. gas. or a mixed phase.

(b) Show that the COP = Qc(Qh -Qc) can be expressed in terms of the enthalpies at three points of the
cycle, explaining all steps of the derivation.

Expert Solution

samet mamat answered 2 years ago

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