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## Thermal Efficiency Optimization for A Natural-Gas Power Plant

#### Saziye BALKU [1]

Energy production from fossil fuels has been regarded as the main source of the climate change. The reason for that is the oxidation of carbon in fossil fuels to carbon dioxide during combustion and the highest percentage of greenhouse gases in atmosphere belongs to carbon dioxide. Amongst the fossil fuels natural gas is preferred due to its low emission of greenhouse gases and having no particulate matter after combustion. While the other fossil fuels emit mainly carbon dioxide during the combustion process; natural gas emits mostly water together with carbon dioxide. Around 22 % of the world’s electricity is produced by natural gas and this share is expected to increase in near future. The power plants operating with natural gas as a gas cycle consisting of a compressor, a combustion chamber and gas turbine are combined with a vapor cycle in order to increase the efficiency. A heat recovery steam generator is used to reach this aim in recent years in generating steam by the heat received from the combustion gases leaving the gas turbine. It is very important to design and operate such energy conversion systems fired by natural gas in optimal conditions. If the efficiency can be increased, it can be said that the energetic, economic, and environmental aspects also improve. The modeling and optimization studies for a combined gas-vapor power plant are studied and the most important parameters which influence the efficiency are determined. The results indicate that the most effective parameters from the viewpoint of efficiency are air/fuel ratio, gas/steam ratio and the pressure ratios of the compressor and, thus, the gas turbine. The thermal efficiency increases by 18.25 % and, in the meantime, the exergy destroyed decreases by 9.84 % using optimum design parameters determined by the optimization algorithm proposed.
Optimization, Combined gas-steam, Thermal efficiency
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Primary Language en Research Article Author: Saziye BALKUInstitution: Atılım University, Energy Systems Engineering Department, Ankara, Turkey Application Date : May 5, 2021 Acceptance Date : May 5, 2021 Publication Date : September 1, 2017
 Bibtex @ { hjse859995, journal = {Hittite Journal of Science and Engineering}, issn = {}, eissn = {2148-4171}, address = {Hitit Üniversitesi Mühendislik Fakültesi Kuzey Kampüsü Çevre Yolu Bulvarı 19030 Çorum / TÜRKİYE}, publisher = {Hitit University}, year = {2017}, volume = {4}, pages = {151 - 157}, doi = {10.17350/HJSE19030000062}, title = {Thermal Efficiency Optimization for A Natural-Gas Power Plant}, key = {cite}, author = {Balku, Saziye} } APA Balku, S . (2017). Thermal Efficiency Optimization for A Natural-Gas Power Plant . Hittite Journal of Science and Engineering , 4 (2) , 151-157 . DOI: 10.17350/HJSE19030000062 MLA Balku, S . "Thermal Efficiency Optimization for A Natural-Gas Power Plant" . Hittite Journal of Science and Engineering 4 (2017 ): 151-157 Chicago Balku, S . "Thermal Efficiency Optimization for A Natural-Gas Power Plant". Hittite Journal of Science and Engineering 4 (2017 ): 151-157 RIS TY - JOUR T1 - Thermal Efficiency Optimization for A Natural-Gas Power Plant AU - Saziye Balku Y1 - 2017 PY - 2017 N1 - doi: 10.17350/HJSE19030000062 DO - 10.17350/HJSE19030000062 T2 - Hittite Journal of Science and Engineering JF - Journal JO - JOR SP - 151 EP - 157 VL - 4 IS - 2 SN - -2148-4171 M3 - doi: 10.17350/HJSE19030000062 UR - https://doi.org/10.17350/HJSE19030000062 Y2 - 2021 ER - EndNote %0 Hittite Journal of Science and Engineering Thermal Efficiency Optimization for A Natural-Gas Power Plant %A Saziye Balku %T Thermal Efficiency Optimization for A Natural-Gas Power Plant %D 2017 %J Hittite Journal of Science and Engineering %P -2148-4171 %V 4 %N 2 %R doi: 10.17350/HJSE19030000062 %U 10.17350/HJSE19030000062 ISNAD Balku, Saziye . "Thermal Efficiency Optimization for A Natural-Gas Power Plant". Hittite Journal of Science and Engineering 4 / 2 (September 2017): 151-157 . https://doi.org/10.17350/HJSE19030000062 AMA Balku S . Thermal Efficiency Optimization for A Natural-Gas Power Plant. Hittite J Sci Eng. 2017; 4(2): 151-157. Vancouver Balku S . Thermal Efficiency Optimization for A Natural-Gas Power Plant. Hittite Journal of Science and Engineering. 2017; 4(2): 151-157. IEEE S. Balku , "Thermal Efficiency Optimization for A Natural-Gas Power Plant", Hittite Journal of Science and Engineering, vol. 4, no. 2, pp. 151-157, Sep. 2017, doi:10.17350/HJSE19030000062

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