Exergy Destruction & Irreversibility · Thermodynamics

Thermodynamics Quiz

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An ideal gas at

T_1 = 500\text{ K}

and

p_1 = 5\text{ bar}

expands adiabatically through a turbine to

p_2 = 1\text{ bar}

. The actual exit temperature is

T_{2a} = 320\text{ K}

while the isentropic exit temperature would be

T_{2s} = 300\text{ K}

. If the dead state is

298\text{ K}

and

1\text{ bar}

, why does exergy destruction occur?

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