Academics – Applied Heat : 2024/MAR/05
Question
Q5. A vapour compression refrigeration system using R134a operates between the pressures of 5.7162 bar and 21.161 bar. The refrigerant enters the compressor and is compressed with 10 K of superheating and compressed through a compressor with an isentropic efficiency of 86%.
No undercooling takes place in the condenser
(a) Draw the cycle on pressure-specific enthalpy and Temperature-specific entropy diagrams. (2)
(b) Calculate EACH of the following:
(i) the temperature leaving the compressor. (11)
(ii) the coefficient of performance (3)
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