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Which draught system is used as conjunction with chimney draught?

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Which draught system is used as conjunction with chimney draught?

(a) Forced steam draught

(b) Forced draught

(c) Induced draught

(d) Balanced draught

This question was addressed to me in homework.

My question is based upon Draught System in portion Steam Generators & Accessories of Energy Engineering

1 Answer

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Correct option is (a) Forced steam draught

The explanation is: The high velocity steam coming out from the nozzle drags the air column along with it creating suction. The kinetic energy of air and steam mixture is converted into pressure energy forcing air through the coal bed to the furnace. So, Forced steam draught is used as a booster in conjunction with chimney draught.

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