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A gas refrigeration cycle with a pressure ratio of 4 uses helium as the working fluid. The temperature of the helium is -6^∘ C at the compressor inlet and 50^∘ C at the turbine inlet. Assuming isentropic efficiencies of 85 percent for both the turbine and the compressor, determine ( a ) the minimum temperature in the cycle, (b) the coefficient of performance, and ( c ) the mass flow rate of the helium for a refrigeration rate of 25 kW. | Numerade

A direct-cycle, gas-cooled reactor uses helium (specific heat e... | Filo