Refrigerant r-134a flows through a refrigeration system at a rate of 0.12 kg/s. At the entrance to the adiabatic compressor, the r-134a is at 140 kPa and -10°C and exits at 700 kPa and 50°C. Given that the system releases waste heat to the environment at a rate of 24.43 kW, find
a) the power required by the compressor.
b) the isothermal efficiency of the compressor.
c) the heat removed from the refrigerated space.
d) the coefficient of performance for the device.