Brayton Cycle
Air enters the compressor of a simple gas turbine at 14.5 lbf/in.2, 80°F, and exits at 87 lbf/in.2, 514°F. The air enters the turbine at 1540°F, 87 lbf/in.2 and expands to 917°F, 14.5 lbf/in.2 The compressor and turbine operate adiabatically, and kinetic and potential energy effects are negligible. On the basis of an air-standard analysis,
(a) develop a full accounting of the net exergy increase of the air passing through the gas turbine combustor, in Btu/lb.
(b) devise and evaluate an exergetic efficiency for the gas turbine cycle.
Let T0 = 80°F, p0 = 14.5 lbf/in.2
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