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Unformatted text preview: 0.05 1.00 2 of 2 What is the standard heat of combustion for this stream (J/mol) assuming air (79 mol % N 2 , 21 mol % O 2 ) is used as the oxidant with 5 % excess air in the combustion products? Provide answers on both a higher heating value (HHV) and lower heating value (LHV) basis. 3) (3 pts) The vent gas stream described in Problem 2 is used as fuel to a process furnace. What is the fuel gas consumption rate (MMSCFD) when the heat duty provided by the furnace is 8.3 MMBtu/hr? The fuel gas and combustion air enter the furnace at 85 F. The combustion gases leave at 995 F. The furnace is operated with 5 % excess air. The furnace is insulated and we assume zero heat loss through the furnace walls. 4) (3 pts) What is the annual fuel cost for the furnace in Problem 3 if fuel is valued at 4.25 $/MMBtu (HHV basis)? Assume the furnace operates 95 % of the year. 5) (3 pts) Problem 4.32 in SVNA7...
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- Spring '08
- Chemical Engineering