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Cost-Effectiveness of Distributed Generation Technologies Electrical Efficiency An IC engine technology characterization study was conducted as part of EPA‘s CHP Partnership Program. Table A-23 summarizes representative performance characteristics from four reciprocating IC engine systems analyzed under the technology characterization study. Table A-23: Performance Characteristics of Four Representative IC Engine Systems Performance Characteristics Required Fuel Gas Pressure (psig) System 1 System 2 System 3 System 4 Base load Electric Capacity (kW) 100 300 800 3,000 Electric Heat Rate (Btu/kWh), HHV 12,000 9,866 9,760 9,492 Electrical Efficiency (%), HHV 28.4% 34.6% 35.0% 36.0% Engine Speed (rpm) 1800 1800 1800 900 Fuel Input (MMBtu/hr) 1.20 4.93 9.76 28.48 <3 <3 <3 43 CHP Characteristics Exhaust Flow (1000 lb/hr) 1.4 6.3 12.1 48.4 Exhaust Temperature (Fahrenheit) 1,060 939 909 688 Heat Recovered from Exhaust (MMBtu/hr) 0.28 1.03 1.85 4.94 Heat Recovered from Cooling Jacket (MMBtu/hr) 0.33 1.13 2.45 4.37 Heat Recovered from Lube System (MMBtu/hr) 0.00 0.00 0.00 1.22 Total Heat Recovered (MMBtu/hr) 0.61 2.16 4.30 10.53 Total Heat Recovered (kW) 179 632 1,260 3,084 Form of Recovered Heat Hot H20 Hot H20 Hot H20 Hot H20 Total Efficiency (%) 79% Thermal Output/Fuel Input (%) Power/Heat Ratio Net Heat Rate (Btu/kWh) Effective Electrical Efficiency 78% 51% 44% 0.56 0.79 4,383 4,470 0.78 0.76 79% 73% 44% 37% 0.79 0.97 4,385 5,107 0.78 0.67 Source: Energy and Environmental Analysis Inc. (2008). Technology Characterization: Reciprocating Engines. Environmental Protection Agency Combined Heat and Power Partnership Program, Washington, DC. Itron, Inc. Appendix A-44 DG TechnologiesPDF Image | Cost-Effectiveness of Distributed Generation Technologies
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