What is the function of economizer in Thermal Power Plant

A. improving thermal efficiency
B. cooling
C. collect ash partials
D. all of the above

Answer: A. improving thermal efficiency

Explanation:
Economizers are heat exchangers that transfer the heat in the flue gas to another medium‚ generally the boiler feed-water‚ although other streams are sometimes used such as make-up water. 

An economizer is a mechanical device used to reduce energy consumption. 

Economizers recycle energy produced within a system or leverage environmental temperature differences to achieve efficiency improvements.

There are 2 types of economizers: non-condensing and condensing.

Basically, economizer is located in between exit of boiler and entry of air pre heater. When the flue gases are coming out from boiler they take away a lot of heat. 

Economizer utilize this heat from flue gases and these heat is used to heat the feed water which is going to feed the boiler.

Economizer is used to absorbing heat from the flue gas for increasing the temperature of the water so that improving the thermal efficiency.



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