Question
Methane gas (CH4) enters a home heating furnace operating at
steady state and burns completely with 110% of theoretical dry air,
each stream entering at 77 F, 1 atm. Combustion products are
discharged to the flue at 300 F, 1 atm. Return air from the house
enters at 60 F, 1 atm, with a volumetric flow rate of 1000 ft3 /min
and is supplied to heat the house at 120 F, 1 atm. Kinetic and
potential energy effects can...