Problem 10.156E - Exergy destruction in a regenerative gas turbine with Reheating, Intercooling, and
Constant Heat Capacities
A gas turbine operates with a regenerator and two tages of reheating and intercooling. Air enters this engine at 14 psia and 60°F, the
pressure ratio for each stage of compression is 3, the air temperature when entering a turbine is 940°F, the engine produces 1250 hp,
and the regenerator operates perfectly. The isentropic efficiency of each compressor is 88 percent and that of each turbine is 93
percent. Determine the exergy destruction associated with each of the processes of the cycle. The temperature of the heat source is
the same as the maximum cycle temperature, and the temperature of the heat sink is the same as the minimum cycle temperature.
Use constant specific heats at room temperature. The properties of air at room temperature are $c_p = 0.24$ Btu/lbm-R and $k = 1.4$.
The exergy destruction for the processes 1-2 and 3-4 of the cycle is ____ Btu/lbm.
The exergy destruction for the processes 5-6 and 7-8 of the cycle is ____ Btu/lbm.
The exergy destruction for the processes 6-7 and 8-9 of the cycle is ____ Btu/lbm.
The exergy destruction for the processes 10-1 and 2-3 of the cycle is ____ Btu/lbm.
The exergy destruction for the regenerator is ____ Btu/lbm.
