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A very large, two-stage, vapor-compression refrigeration unit using R-134a produces 3000 tons of refrigeration with an evaporator pressure of 100 kPa and a condenser pressure of 2000 kPa. The intermediate flash chamber operates at 800 kPa, and the isentropic efficiencies of the compressors in each loop are both 91%. The following operating specifications have been determined for the stages (loops):

Stage (Loop) A

Stage (Loop) B

2229_Table 2.jpg

For this design, determine

a. The mass flow rate of the refrigerant.

b. The system's coefficient of performance.

c. The total power required by the compressor.

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Reference No.:- M92101733

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