Consider an Ideal Gas Refrigeration Cycle Using Helium as the Working

Multiple Choice

Consider an ideal gas refrigeration cycle using helium as the working fluid. Helium enters the compressor at 100 kPa and -20°C and is compressed to 220 kPa. Helium is then cooled to 20°C before it enters the turbine. For a mass flow rate of 0.22 kg/s, the net power input required is

A) 1.1 kW
B) 16.6 kW
C) 37.8 kW
D) 164 kW
E) 107 kW