Consider a Brayton refrigeration cycle with a regenerative heat exchanger. Air enters the compressor at 500R,16lbf/in2 and is compressed to 45lbf/in2. Compressed air enters the regenerative heat exchanger at 550R and is cooled to 490R before entering the turbine. The compressor and turbine each have isentropic efficiencies of 78%. The principal states are numbered as in figure below. If the refrigeration capacity is 10 tons, calculate: (a) the volumetric flow rate at the compressor inlet, in ft3/min. (b) the coefficient of performance. (c) the rate of entropy production within the compressor, in Btu/min R. (d) the rate of entropy production within the turbine, in Btu/min. R. Consider a Brayton refrigeration cycle with a regenerative heat exchanger. Air enters the compressor at 500R,16lbf/in2 and is compressed to 45lbf/in2. Compressed air enters the regenerative heat exchanger at 550R and is cooled to 490R before entering the turbine. The compressor and turbine each have isentropic efficiencies of 78%. The principal states are numbered as in figure below. If the refrigeration capacity is 10 tons, calculate: (a) the volumetric flow rate at the compressor inlet, in ft3/min. (b) the coefficient of performance. (c) the rate of entropy production within the compressor, in Btu/min R. (d) the rate of entropy production within the turbine, in Btu/min. R