Repeat Prob. 11-107 assuming the compressor has an isentropic efficiency of 75 percent. Also, determine the rate of exergy destruction associated with the compression process in this case. Take T0 = 25oC.
A large refrigeration plant is to be maintained at - 15oC, and it requires refrigeration at a rate of 100 kW. The condenser of the plant is to be cooled by liquid water, which experiences a temperature rise of 88C as it flows over the coils of the condenser. Assuming the plant operates on the ideal vapor-compression cycle using refrigerant- 134a between the pressure limits of 120 and 700 kPa, determine
(a) The mass flow rate of the refrigerant.
(b) The power input to the compressor.
(c) The mass flow rate of the cooling water.