Engineering design and exergy analyses for combustion gas turbine based power generation system |
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| Affiliation: | 1. Departamento de Física Aplicada, Universidad de Salamanca, 37008 Salamanca, Spain;2. Departamento de Física Aplicada and IUFFYM, Universidad de Salamanca, 37008 Salamanca, Spain;1. Department of Thermal Science and Energy Engineering, University of Science and Technology of China, China;2. Department of Mechanical Engineering, Sana''a University, Sana''a, Yemen;1. Graduate School, Inha University, Incheon 402-751, Republic of Korea;2. Dept. of Mechanical Engineering, Inha University, Inha-ro 100, Nam-gu, Incheon 402-751, Republic of Korea;1. School of Automation Engineering, Northeast Electric Power University, Jilin, China;2. State Grid Jilin Electric Power Co., Ltd., Changchun, China;3. School of Energy and Power Engineering, Northeast Electric Power University, Jilin, China |
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| Abstract: | This paper presents the engineering design and theoretical exergetic analyses of the plant for combustion gas turbine based power generation systems. Exergy analysis is performed based on the first and second laws of thermodynamics for power generation systems. The results show the exergy analyses for a steam cycle system predict the plant efficiency more precisely. The plant efficiency for partial load operation is lower than full load operation. Increasing the pinch points will decrease the combined cycle plant efficiency. The engineering design is based on inlet air-cooling and natural gas preheating for increasing the net power output and efficiency. To evaluate the energy utilization, one combined cycle unit and one cogeneration system, consisting of gas turbine generators, heat recovery steam generators, one steam turbine generator with steam extracted for process have been analyzed. The analytical results are used for engineering design and component selection. |
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