8-140 Combustion gases enter a gas turbine at 750°C and 1.2 MPa at a rate of 3.4 kg/s and leave at 630°C and 500 kPa. It is estimated that heat is lost from the turbine at a rate of 30 kW. Using air properties for the combustion gases and assuming the surroundings to be at 25°C and 100 kPa, determine a) the actual and reversible power outputs of the turbine, b) the exergy destroyed within the turbine, and c) the second-law efficiency of the turbine. | |
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