Second law analysis of a natural gas‐fired gas turbine cogeneration system |
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| Authors: | B V Reddy Cliff Butcher |
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| Affiliation: | 1. Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe St., North Oshawa, Ont., Canada L1H 7L7;2. Department of Mechanical Engineering, University of New Brunswick, Fredericton, NB, Canada E3B 5A3 |
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| Abstract: | The influence of operating conditions such as reheat, intercooling, ambient temperature and pressure ratio are analyzed from a second law perspective on the performance of a natural gas‐fired gas turbine cogeneration system. The effect of these operating parameters on carbon dioxide emissions is also discussed. The second law efficiency of gas turbine cogeneration system increases markedly with reheat option. Higher pressure ratios lead to decreased second law cogeneration efficiency but this effect can be reduced with a higher level of reheat option. The effect of intercooling on second law efficiency is strongly related to pressure ratio with higher pressure ratios significantly decreasing efficiency. The second law efficiency is not so sensitive to the environment temperature for levels of reheat or intercooling greater than 50%. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | gas turbine cogeneration second law exergy reheat intercooling efficiency |
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