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homework no. 5 2010

# homework no. 5 2010 - Homework No 5 Due Friday July 30...

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Problem 1: System Integrations: gasoline engine driven air compressor Gasoline fuel to engine, \$2.60/gallon Gasoline Engine Air Compressor Air, 7 lbm/ min, 0psig 78 deg F Air, 150 psig Assumptions for Engine: Ideal Otto Cycle, cold air standard assumptions, r = 9.5 Assumptions for compressor: Adiabatic, no heat losses or gains Neg. changes in KE and PE for the air Isentropic compression Ideal gas assumption applies Find hourly cost to operate Fuel In Turbine output Heat rejection 120 kW ouput Generator Effic = 95% Elec. Generator Air Conditioned Building Heat removal from building, cooling effect, btu/ h or tons Abs. Chiller COP = 1.1 double effect LiBr/Water Absorption Chiller r p = 18 How much cooling can we do with this system (btu/h and tons)? Assume Ideal Brayton Cycle Homework No. 5 Due Friday July 30 Problem 2: System Integration Combined Heat and Power

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Diesel Engine, r = 18, r c = 1.8 Diesel, 138,000 btu/gal, \$3/ gallon Condenser Evaporator
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