Consider an ideal gas refrigeration cycle using helium as the working fluid. Helium enters the compressor at 105 kPa and 18°C and compressed to 410 kPa. Helium is then cooled to 19°C before it enters the turbine. Assume constant heat capacity of helium. For a mass flow rate of 0.21 kg/s, the net power input required is
a. 96.1652 kW
b. 63.0826 kW
c. 48.0826 kW
d. 81.1652 kW
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