Answer: A gas refrigeration system using air as the
Chapter 11, Problem 122P(choose chapter or problem)
11-122 A gas refrigeration system using air as the working fluid has a pressure ratio of 5 . Air enters the compressor at \(0^{\circ} \mathrm{C}\). The high-pressure air is cooled to \(35^{\circ} \mathrm{C}\) by rejecting heat to the surroundings. The refrigerant leaves the turbine at \(-80^{\circ} \mathrm{C}\) and enters the refrigerated space where it absorbs heat before entering the regenerator. The mass flow rate of air is . Assuming isentropic efficiencies of 80 percent for the compressor and 85 percent for the turbine and using variable specific heats, determine
the effectiveness of the regenerator,
(b) the rate of heat removal from the refrigerated space, and
the
of the cycle. Also, determine
the refrigeration load and the COP if this system operated on the simple gas refrigeration cycle. Use the same compressor inlet temperature as given, the same turbine inlet temperature as calculated, and the same compressor and turbine efficiencies.
Equation Transcription:
Text Transcription:
0°C
35°C
-80°C
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