Comparative Analysis of Environmental Sustainability and Performance Indices of Different Gas Turbine Inlet Cooling Systems
- سال انتشار: 1402
- محل انتشار: مجله پیشرفت در تحقیقات بهداشت محیط، دوره: 12، شماره: 3
- کد COI اختصاصی: JR_JAEHR-12-3_002
- زبان مقاله: انگلیسی
- تعداد مشاهده: 108
نویسندگان
Department of Mechanical Engineering, Federal University of Technology, Ikot Abasi, Nigeria
Department of Mechanical Engineering, Akwa Ibom State Polytechnics, Ikot Osurua, Ikot Ekpene, Nigeria
Department of Mechanical Engineering, Akwa Ibom State Polytechnics, Ikot Osurua, Ikot Ekpene, Nigeria
چکیده
Background: A thermodynamic analysis was performed on the inlet air cooling system of a natural gas-fueled turbine at the Afam power plant in Nigeria. The objective was to identify optimal conditions for environmental sustainability, performance output, fossil fuel economy, and cost-effectiveness. Methods: Three cooling methods were evaluated: spray cooler with wetted media, fogging system, and mechanical chiller. Energy, exergy, and exergy-economic models for both the existing and modeled turbine units were compared. The developed program source code indicated that both sustainability and performance indices improved when the turbine inlet cooling system adhered to design specifications. Results: The refrigeration method achieved the lowest inlet temperature at ۱۵ ℃ and a sustainability index (SI) of ۲.۲۴۳. The SI decreased with increasing ambient temperatures due to higher total exergetic destruction. Regarding performance indices—net turbine output, energy efficiency, and exergy efficiency—the spray cooler had the highest values at ۹۸.۸۴۵ WM, ۲۹.۰۵%, and ۲۸.۴۹% respectively. This was followed by the mechanical chiller at ۱۰۰.۶۹۲ WM, ۲۹.۲۵%, and ۲۹.۰۳%, and the fogging system at ۹۸.۶۹۵ WM, ۲۹.۰۳%, and ۲۸.۴۵%. The base system recorded the lowest values at ۹۵.۷۰ WM, ۲۸.۶۹%, and ۲۷.۵۸%, attributed to increased compressor work. Both the environmental effect factor (EEF) and waste exergy ratio (WER) decreased with rising ambient temperature due to total exergetic destruction. conclusion: The refrigeration cooling method is recommended due to its lower inlet conditions, minimal exergy destruction, and high environmental sustainability, performance efficiency, and cost-effectiveness. Inlet-air cooling remains an efficient technique for improved performance.کلیدواژه ها
Gas turbine, Environmental Sustainability, Performance output, Cooling systems, Techno-economyاطلاعات بیشتر در مورد COI
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