1.

Which is the correct formula of total draught loss?(a) Ht = Hv + Hb + Hc + Hcd(b) Ht = Hv + Hb – Hc + Hcd(c) Ht = Hv – Hb + Hc + Hcd(d) Ht = Hv – Hb – Hc – HcdThe question was asked during an online exam.This interesting question is from Draught System in division Steam Generators & Accessories of Energy Engineering

Answer»

The correct option is (a) HT = Hv + Hb + Hc + Hcd

Easy explanation: The TOTAL draught required to PRODUCE the current of the air and to expel the flue gases is given as follows.

Total draught loss = Velocity head loss at the chimney exit + fuel bed RESISTANCE + head loss in

Equipment’s like economizer, air heater ETC. + head loss in chimney and ducts

i.e.,Ht = Hv + Hb + Hc + Hcd



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