A steam boiler heats liquid water at 2008C to superheated
Chapter 15, Problem 15108(choose chapter or problem)
A steam boiler heats liquid water at 2008C to superheated steam at 4 MPa and 4008C. Methane fuel (CH4) is burned at atmospheric pressure with 50 percent excess air. The fuel and air enter the boiler at 258C and the products of combustion leave at 2278C. Calculate (a) the amount of steam generated per unit of fuel mass burned, (b) the change in the exergy of the combustion streams, in kJ/kg fuel, (c) the change in the exergy of the steam stream, in kJ/kg steam, and (d) the lost work potential, in kJ/kg fuel. Take T0 5 258C.
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