Economiser is used to heat
A. air
B. feed water
C. flue gases
D. all above
Answer: Option B
Solution (By Examveda Team)
An economiser is used to heat feed water.Feed water: This is the water supplied to the boiler to generate steam. The economiser increases the temperature of the feed water by utilizing the heat from the flue gases exiting the boiler.
Purpose: By heating the feed water, the economiser improves the overall efficiency of the boiler by recovering waste heat, thus reducing fuel consumption.
Not used for: Heating air or flue gases, although it works with the heat from flue gases to perform its function.
This Question Belongs to Electrical Engineering >> Power Plant Engineering In EE
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