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Answer Posted / ravikumar
Feed Water Preheating using Economiser.
For an older shell boiler, with a flue gas exit
temperature of 260oC, an economizer could be used to reduce
it to 200oC, Increase in overall thermal efficiency would
be in the order of 3%.
Condensing economizer(N.Gas) Flue gas reduction up to 65oC.
6oC raise in feed water temperature, by
economiser/condensate recovery, corresponds to a 1% saving
in fuel consumption
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