Discussion
Consider the following statements about exergy.
1. Exergy is destroyed by irreversibility.
2. Exergy of a stream is zero at the dead state.
3. Exergy is conserved in every real process.
Answer: B
The first two are correct and define how exergy is used. The third confuses exergy with energy, since the whole value of an exergy analysis lies in the fact that it is not conserved. Where it disappears is where the plant is losing money.
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