A gas turbine for an automobile is designed with a regenerator. Air enters the compressor of this engine at 100 kPa and 20oC. The compressor pressure ratio is 8; the maximum cycle temperature is 800oC, and the cold airstream leaves the regenerator 10oC cooler than the hot airstream at the inlet of the regenerator. The cycle produces 150 kW. The compressor isentropic efficiency is 87 percent, and the turbine isentropic efficiency is 93 percent. Determine the exergy destruction for each of the processes of the cycle. The temperature of the hot reservoir is the same as the maximum cycle temperature, and the temperature of the cold reservoir is the same as the minimum cycle temperature. Use constant specific heats at room temperature.
A gas turbine for an automobile is designed with a regenerator. Air enters the compressor of this engine at 100 kPa and 20oC. The compressor pressure ratio is 8; the maximum cycle temperature is 800oC, and the cold airstream leaves the regenerator 10oC cooler than the hot airstream at the inlet of the regenerator. The cycle produces 150 kW. The compressor isentropic efficiency is 87 percent, and the turbine isentropic efficiency is 93 percent. Determine the exergy destruction for each of the processes of the cycle. The temperature of the hot reservoir is the same as the maximum cycle temperature, and the temperature of the cold reservoir is the same as the minimum cycle temperature. Use constant specific heats at room temperature.
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