Which of the following is not increased by using preheated combustion
air in place of ordinary air at room temperature?
(A) Calorific value of the fuel
(B) Flame temperature achieved
(C) Speed of combustion of fuel
(D) Heat transfer rate to the stock in the furnace
air in place of ordinary air at room temperature?
(A) Calorific value of the fuel
(B) Flame temperature achieved
(C) Speed of combustion of fuel
(D) Heat transfer rate to the stock in the furnace