In a water cooled compressor 0.5 kg of air is compressed per second. A shaft input of 60 kW is…

In a water cooled compressor 0.5 kg of air is compressed per second. A shaft input of 60 kW is required to run the compressor. Heat lost to the cooling water is 30 per cent of input and 10 per cent of the input is lost in bearings and other frictional effects. Air enters the compressor at 1 bar and 20°C. Neglecting the changes in kinetic energy and potential energy, determine the exit air temperature. Take c p = 1 kJ/kg°C air.

Consider steady flow process.