Steam Calculations

I would suggest it is more appropriate to obtain the flow (weight/hr), fuel composition and Orsat analysis of the combustion gases as well as discharge temperature in order to make this determination.

Orsat is a very good excercise, but if only inlet and outlet flows are needed a simpler approach could be the "Million-BTU Method."

F = 10^4(100-%ash - %solid fuel loss)/HHV

Awet = ((11.68(%c) + 35.03(%H - %O/8) + 4.38(%S))/HHV)10^4

C = 1 - (%solid combustible weight loss)/100

P = F + CA

P= Total gaseous products, lb / 10^6 Btu

F = fuel fired less ash and loss, lb / 10^6 Btu

A = Atmospheric air, lb / 10^6 Btu

C = Combustible loss factor

Reference "Combustion Fossil Power," 4 ed, Singer

What is the source producing the waste heat? Is there supplementary firing before the WHRB? A little more info would be helpful.