A steady flow compressor for a gas turbine receives air at 1 bar and 15 °C, which it compresses to 7 bar with an efficiency of 83%. Based on surroundings at 5°C determine the change of availability and the work for isentropic compression. For the actual process evaluate (b) the change of availability and work done,
(c) the change of availability of the surroundings and
(d) the irreversibility. Treat the gas as an ideal one, with the specific heat at constant pressure, cp = 1.004 kJ/ kg K, and the ratio of specific heats, K = 1.4.