Exergoeconomic Analysis of an Industrial Cogeneration Cooling System Powered by Natural Gas Fueled Diesel Engine
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Tarih
2020
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Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This study presents the exergy and exergoeconomic analysis of a natural gas-powered diesel cogenerationsystem. The cogeneration system is designed for a sports complex with 1000 m2 closed area in Afyonkarahisarcity. Natural gas is used as the fuel in the cogeneration system of the sports complex, which includes aswimming pool and ice rink. The natural gas diesel engine is used as the primary energy source for thecogeneration system. In the system, the electricity required for the cooling cycle is produced from the natural gasdiesel engine. At the same time, the engine exhaust gases are used in the process of heat generation forswimming pool water heating. Finally, the waste heat discharged from the system is used to produce electricityin the thermoelectric power unit. The cogeneration system was modeled thermodynamically by the EES programon a computer and then economically analyzed by using the Aspen Plus program. The operation of thecogeneration system is described in detail, and a methodology based on exergoeconomic relations and SPECOmethod is provided to allocate cost flows through subcomponents of the system. The results were compared byusing thermodynamic and exergoeconomic performance parameters. The exergetic efficiency of thecogeneration system is found to be 28.74%, which indicates that 71.26% of the total exergy input to the system,mainly by natural gas, is destroyed. As a result of the economic analysis of the cogeneration system, theinvestment cost was calculated as 62,000 $. The exergetic cost rate and the specific unit exergetic cost of thepower produced in the cogeneration system are calculated to be 0.75 $/h and 10.93 $/GJ (0.039 $/kWh),respectively. The specific unit exergetic cost of the energy produced in the cogeneration system for cooling theice rink and heating the swimming pool in the sports complex are calculated to be 6.152 $/GJ (0.022 $/kWh) and4.221 $/GJ (0.0152 $ /kWh), respectively.
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Düzce Üniversitesi Bilim ve Teknoloji Dergisi
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8
Sayı
1
