Question: ethane ( CH 4 ) is burned with 2 0 % excess air in the furnace of a steam power plant. The methane is supplied

ethane

(

4)

is burned with

20 %

excess air in the furnace of a steam power plant. The methane is supplied at

1

atm,

25 \

deg C

,

and the air is preheated to

177 \

deg C

.

The products of complete combustion leave the stack at

150 \

deg C

.

Assuming negligible energy losses to the surroundings, determine the energy transferred to the steam per kmol of methane in the form of heat transfer.

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