A certain industrial process requires a steady 0.75 kg/s supply of compressed air at 500kPa at a maximum temperature of 30°C, as shown in the figure below. This air is to be supplied by installing a compressor and an after cooler. Local ambient conditions are 100kPa, 20°C. Using a reversible compressor, determine the power required to drive the compressor and the rate of heat rejection in the after cooler.

Fig: 1

Fig: 2