A gas refrigeration cycle with a pressure ratio of 4 uses helium as the working fluid....

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. Assume isentropic efficiencies of 88 percent for both the turbine and the compressor.

(Given: The properties of helium are c_p= 5.1926 kJ/kg·K and k = 1.667.)

FIND:

a. The minimum temperature of the cycle.

b. The coefficient of performance.

c. the mass flow rate of the helium.

Expert Solution

samet mamat answered 1 year ago

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