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THERMO-ECONOMIC IMPACT FROM USING EXHAUST GASES HEAT LOST FOR POWERING AN ABSORPTION REFRIGERATION SYSTEM USED FOR INLET AIR COOLING OF COMPRESSOR

Authors: Hussam T. Khrebish --- Hussien S. Sultan
Journal: KUFA JOURNAL OF ENGINEERING مجلة الكوفة الهندسية ISSN: 25230018 Year: 2019 Volume: 10 Issue: 3 Pages: 114-133
Publisher: University of Kufa جامعة الكوفة

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Abstract

The heat lost from gas turbine power plants with exhaust gases represents the most important source for lowering its thermal efficiency. Also, the thermal efficiency of gas turbine can be affected significantly by the ambient surrounding temperature. In Basrah, a lot of gas turbine units have been installed during the last period. In this study, the thermal-economic impact of the heat lost from gas turbine power plant (GTPP) to the atmosphere for different ambient temperature is studied. Heat recovery system is used, the heat recovery system is an absorption refrigeration system used for cooling the air inlet to the gas turbine cycle. For combined system gas turbine-refrigeration cycle, the performance and economic analysis are performed. The results shows that as, the output power and thermal efficiency are decreased by 0.97 MW and 0.0726% respectively for each unit temperature rise of the ambient temperature. The used of the absorption chiller would increase the output power by 23.3%. Also, the thermal efficiency increased by 23.35%.


Article
Thermo-economic Impact from Using Exhaust Gases Heat Lost for Power Generation

Authors: Dr. Hussien S. Sultan --- Hussam T. Khrebish
Journal: Basrah Journal for Engineering Science مجلة البصرة للعلوم الهندسية ISSN: Print: 18146120; Online: 23118385 Year: 2019 Volume: 19 Issue: 1 Pages: 1-11
Publisher: Basrah University جامعة البصرة

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Abstract

The heat lost from gas turbine power plants with exhaust gases represents the most important source for lowering its thermal efficiency. Also, the gas turbine thermal efficiency affected significantly with the ambient surrounding temperature. Al-Najybia gas-turbine power plant in Basrah, Iraq is choosing as a case study. The power plant consists of four units with a capacity of 125 MW for each unit. In the present study, all the calculations are performed for one unit only. Firstly the thermal impact is studied in terms of energy analysis for Al-Najybia gas turbine power plant (GTPP) for different ambient temperature for twelve months. Also, the economic loss a companied the heat lost with exhaust gases for different ambient temperature are estimated. Secondly, the thermo-economic improvement from coupling the GTPP with a heat recovery system is studied. For gas-steam combined cycle, the performance and economic analysis are performed. The results show that, the output power and thermal efficiency are decreased by 0.97 MW and 0.0726% respectively for each unit temperature rise of the ambient temperature. For the combined gas-steam power plant the percentage increasing of the thermal efficiency is approximately 46.4%. The results indicate the combined cycle power plant (CCPP) is very important to increase electrical capacity. From the economic analysis, the economic gain due

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