13. Air is compressed steadily in a compressor from 100 kPa and 300 K to 1 MPa and 500 K, at a rate of 20 kg/s. The compressor is not well insulated, and a heat loss of 50 kJ/kg occurs during the process.

Assuming the changes in kinetic and potential energies are negligible, determine the power input to

the compressor, in kW.