FuelCell Energy, Inc. is the manufacturer of Direct FuelCell (DFC) power plants
ID: 2327775 • Letter: F
Question
FuelCell Energy, Inc. is the manufacturer of Direct FuelCell (DFC) power plants that utilize molten carbonate fuel cells with an electrolyte consisting of potassium and lithium carbonates. The DFC300 is a 300 kW fuel cell power plant that is fueled with natural gas. Consider a DFC300 power plant that is fueled with natural gas that has a lower heating value of 48.3 MJ/kg. Based on the lower heating value of the fuel, the power plant has a heat rate of 7260 Btu/kWhe. The capacity factor of the plant is 97%. The DFC300 is a combined heat and power (CHP) plant which produces 808,000 Btu/h of heat energy at 120 degree F at rated power. Assume natural gas has a carbon content of 75% (wt). c. How much CO_2 is produced per MWh of combined heat and power (kgco2/MWhcHp)?Explanation / Answer
DFC 300 Power Plant: Esitmate Carbon Dioxide emission Qunatity Units Power Capacity 300 Kw Capcity factor 0.97 Actual Power Produced 291 Kw Power Plant Heat rate 7260 Btu/KWhr Conversion 1 Kw 3412 Btu/hr Thermal Effiecnecy of Power plant 47.00% CHP produces 808000 Btu/hr 236.8112544 KW 236811.2544 Joules per Sec Heat Produced per hour 852520515.8 Joules per hr Heating Value of Fuel per Kg 48300000 Joules per Kg Fuel Quantity 17.65052828 Kg/hr Fuel Consumed @ Power Plant efficnecy 37.55651679 Kg/hr Percentage Carbon in the fuel 75% % Weight of Carbon in the fuel 28.16738759 Kg/hr From Equation : C + O2 = CO2 from this we get for Every 12 Kg of C burnt, 44 Kg of CO2 is produced Weight of CO2 Produced 103.2804212 Kg/hr Actual power Produced = thoeritical power x efficiency 111.2947658 Kw Weight of CO2 Produced per MW hr = 928.0 Kg/hr
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