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Influence of Operation Schemes on the Performance of the Natural Draft Hybrid Cooling System for Thermal Power Generation

Author

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  • Huimin Wei

    (Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Ministry of Education, Beijing 102206, China)

  • Lin Chen

    (Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Ministry of Education, Beijing 102206, China)

  • Zhihua Ge

    (Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Ministry of Education, Beijing 102206, China)

  • Lijun Yang

    (Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Ministry of Education, Beijing 102206, China)

  • Xiaoze Du

    (School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China)

Abstract

For thermal power generation, the natural draft hybrid cooling system (NDHCs) with airflows in parallel design gives a multi-objective solution for water saving, performance enhancement and maintenance issues, like corrosion, by switching the loads of wet and dry sections. Performances of dry and wet sections interact with each other in the highly integrated system, increasing the complexity of operation strategies. In this context the present paper examines eight different operation schemes to reveal the relationships of ambient conditions and operation schemes. Comprehensive comparisons in the view of cooling efficiency with a same water inlet temperature are conducted firstly. Results show that there exists energy-saving potentials of the water evaporated rate, cooling performances and the pump power for different schemes. Based on the practical boundary conditions, including those of weather data, operation hours and market factors, optimal operation strategies of hybrid cooling are designed to minimize the operation costs of the energy system. For the 660 MW power generating unit integrated with a natural draft dry cooling system (NDDCs), operation costs based on NDHC after optimization decreased about 0.8% in 2010 and 0.35% in 2018 compared with that of the basic system. When comparing with the designed operation modes of hybrid cooling, 0.07 million dollars is saved after optimization.

Suggested Citation

  • Huimin Wei & Lin Chen & Zhihua Ge & Lijun Yang & Xiaoze Du, 2021. "Influence of Operation Schemes on the Performance of the Natural Draft Hybrid Cooling System for Thermal Power Generation," Energies, MDPI, vol. 14(18), pages 1-22, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:18:p:5653-:d:631631
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    References listed on IDEAS

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    1. Tyagi, S.K. & Pandey, A.K. & Pant, P.C. & Tyagi, V.V., 2012. "Formation, potential and abatement of plume from wet cooling towers: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(5), pages 3409-3429.
    2. Wei, Huimin & Huang, Xianwei & Chen, Lin & Yang, Lijun & Du, Xiaoze, 2020. "Performance prediction and cost-effectiveness analysis of a novel natural draft hybrid cooling system for power plants," Applied Energy, Elsevier, vol. 262(C).
    3. Sun, Yubiao & Duniam, Sam & Guan, Zhiqiang & Gurgenci, Hal & Dong, Peixin & Wang, Jianyong & Hooman, Kamel, 2019. "Coupling supercritical carbon dioxide Brayton cycle with spray-assisted dry cooling technology for concentrated solar power," Applied Energy, Elsevier, vol. 251(C), pages 1-1.
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