Energy- and exergy-based comparison of coal-fired and nuclear steam power plants |
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| Affiliation: | 1. Power Management Institute, NTPC Ltd, Sector-16A, Noida, Uttar Pradesh 201301, India;2. Centre for Energy Studies, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India;1. State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China;2. Shenhua Guohua Guangtou (Beihai) Power Generation Co., Ltd., Beihai, 536000, China;1. Department of Energy and Process Engineering, Norwegian University of Science and Technology, Kolbjorn Hejes v. 1A, NO-7491 Trondheim, Norway;2. SINTEF Energy Research, Kolbjorn Hejes v. 1A, NO-7491 Trondheim, Norway |
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| Abstract: | The results are reported of energy- and exergy-based comparisons of coal-fired and nuclear electrical generating stations. A version of a process-simulation computer code, previously enhanced by the author for exergy analysis, is used. Overall energy and exergy efficiencies, respectively, are 37% and 36% for the coal-fired process, and 30% and 30% for the nuclear process. The losses in both plants exhibit many common characteristics. Energy losses associated with emissions (mainly with spent cooling water) account for all of the energy losses, while emission-related exergy losses account for approximately 10% of the exergy losses. The remaining exergy losses are associated with internal consumptions, mainly in components which generate heat by combustion or nuclear reactions, and in components which transfer heat across large temperature differences. It is anticipated that the results will prove useful to those involved in the improvement of existing and design of future electrical generating stations. |
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