A gas refrigeration cycle with a pressure ratio of 4 uses helium
as the working fluid....
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Mechanical Engineering
A gas refrigeration cycle with a pressure ratio of 4 uses heliumas the working fluid. The temperature of the helium is -6°C at thecompressor inlet and 50°C at the turbine inlet. Assume isentropicefficiencies of 88 percent for both the turbine and thecompressor.
(Given: The properties of helium are cp=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.
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