Q3 [20 marks] An industrial scale refrigerator has R134a as the working fluid. The condenser operates on an isobar (that

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Q3 20 Marks An Industrial Scale Refrigerator Has R134a As The Working Fluid The Condenser Operates On An Isobar That 1 (135.79 KiB) Viewed 52 times

Q3 [20 marks] An industrial scale refrigerator has R134a as the working fluid. The condenser operates on an isobar (that is, at constant pressure) with an exit temperature of 40 °C; the evaporator is at 4 °C. The mass flow rate through the cycle is 5.0 kg/s. The schematic of the cycle is given in the left panel of the figure below; the right panel shows the temperature-entropy (TS) diagram. What is the refrigeration rate 10.1? [10 marks] b. What work rate (power) does the compressor need? [10 marks] a. Use the tables for R134a as provided at the end of typed-up Lecture Notes 4 (on refrigeration & liquefaction). T 3 4 3 condenser throttle valve A compressor 1 2 1 evaporator S