A Brayton-refrigeration cycle with a regenerative heat exchanger operates with a compressor and turbine at 86% efficiency. The compressor receives air at 480°R, 14.7 psi which is compressed to 40 psi. Compressed air enters the regenerative heat exchanger at 540°R and cools down to 480°R before entering the turbine. If the refrigeration capacity is 15 tons, calculate: the volume flow rate entering the compressor. the coefficient of performance.

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