A gas refrigeration system utilizing air as the working fluid possesses a pressure ratio of 3. The air is directed into the compressor at 5°C. The high- pressure air is then cooled down to 40°C by rejecting heat to the ambient environment. The refrigerant exits the turbine at -85°C and subsequently absorbs heat from the cooling area prior to its entry into the regenerator. The mass flow rate of air is 0.45 kg/s. Given that the isentropic efficiencies are 82 percent for the compressor and 87 percent for the turbine, and using constant specific heats at ambient temperature, find: ) The refrigeration load and the COP if this system functioned based on the simple gas refrigeration cycle. Ensure that the same compressor inlet temperature is maintained as given, and the turbine inlet temperature is kept constant as calculated, along with identical compressor and turbine efficiencies.
A gas refrigeration system utilizing air as the working fluid possesses a pressure ratio of 3. The air is directed into the compressor at 5°C. The high- pressure air is then cooled down to 40°C by rejecting heat to the ambient environment. The refrigerant exits the turbine at -85°C and subsequently absorbs heat from the cooling area prior to its entry into the regenerator. The mass flow rate of air is 0.45 kg/s. Given that the isentropic efficiencies are 82 percent for the compressor and 87 percent for the turbine, and using constant specific heats at ambient temperature, find: ) The refrigeration load and the COP if this system functioned based on the
simple gas refrigeration cycle.
Ensure that the same compressor inlet temperature is maintained as given, and
the turbine inlet temperature is kept constant as calculated, along with
identical compressor and turbine efficiencies.
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