Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an_________________?
Correct answer: D. All A., B. and C.
- A. Economiser
- B. Steam superheater
- C. Air preheater
- D. All A., B. and C.
Explanation
Flue-gas heat can be recovered successively in an economiser for feedwater, a superheater for steam, and an air preheater for combustion air. Thus, all three devices recover waste heat.
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