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The thermal efficiency improvement of a steam Rankine cycle by innovative design of a hybrid cooling tower and a solar chimney concept

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  • Zandian, Arash
  • Ashjaee, Mehdi

Abstract

In the present work, a dry cooling tower and a solar chimney design are recombined in order to increase the thermal efficiency of a steam Rankine cycle. The rejected heat from the condenser into the dry cooling tower supplemented by the solar radiation gained through its transparent cover are the sources of wind energy generation that is captured by a wind turbine which is located at the beginning of the chimney. In this research a case study for a 250 MW steam power plant of Shahid Rajaee in Iran has been performed. A CFD finite volume code is developed to find the generated wind velocity at the turbine entrance for a 250 m dry cooling tower base diameter and a chimney height of 200 m. Calculations have been iterated for different ambient temperatures and solar irradiances, representing temperature gradient within day length. A range of 360 kW to 3 MW power is obtained for the change in the chimney diameter from 10 to 50 m. The results show a maximum of 0.37 percent increase in the thermal efficiency of a 250 MW fossil fuel power plant unit; which proves this design to be a significant improvement in efficiency of thermal power plants, by capturing the heat that is dissipated from dry cooling towers.

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  • Zandian, Arash & Ashjaee, Mehdi, 2013. "The thermal efficiency improvement of a steam Rankine cycle by innovative design of a hybrid cooling tower and a solar chimney concept," Renewable Energy, Elsevier, vol. 51(C), pages 465-473.
    • Handle: RePEc:eee:renene:v:51:y:2013:i:c:p:465-473
    DOI: 10.1016/j.renene.2012.09.051
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    References listed on IDEAS

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    1. Zhou, Xinping & Yang, Jiakuan & Xiao, Bo & Hou, Guoxiang, 2007. "Simulation of a pilot solar chimney thermal power generating equipment," Renewable Energy, Elsevier, vol. 32(10), pages 1637-1644.
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    2. Boukelia, T.E. & Bouraoui, A. & Laouafi, A. & Djimli, S. & Kabar, Y., 2020. "3E (Energy-Exergy-Economic) comparative study of integrating wet and dry cooling systems in solar tower power plants," Energy, Elsevier, vol. 200(C).
    3. Emad Abdelsalam & Fares Almomani & Feras Kafiah & Eyad Almaitta & Muhammad Tawalbeh & Asma Khasawneh & Dareen Habash & Abdullah Omar & Malek Alkasrawi, 2021. "A New Sustainable and Novel Hybrid Solar Chimney Power Plant Design for Power Generation and Seawater Desalination," Sustainability, MDPI, vol. 13(21), pages 1-24, November.
    4. Maia, Cristiana Brasil & Ferreira, André Guimarães & Cabezas-Gómez, Luben & de Oliveira Castro Silva, Janaína & de Morais Hanriot, Sérgio, 2017. "Thermodynamic analysis of the drying process of bananas in a small-scale solar updraft tower in Brazil," Renewable Energy, Elsevier, vol. 114(PB), pages 1005-1012.
    5. Hu, Siyang & Leung, Dennis Y.C. & Chan, John C.Y., 2017. "Numerical modelling and comparison of the performance of diffuser-type solar chimneys for power generation," Applied Energy, Elsevier, vol. 204(C), pages 948-957.
    6. Zhao, Yuanbin & Sun, Fengzhong & Li, Yan & Long, Guoqing & Yang, Zhi, 2015. "Numerical study on the cooling performance of natural draft dry cooling tower with vertical delta radiators under constant heat load," Applied Energy, Elsevier, vol. 149(C), pages 225-237.
    7. Emad Abdelsalam & Fares Almomani & Shadwa Ibrahim & Feras Kafiah & Mohammad Jamjoum & Malek Alkasrawi, 2023. "A Novel Design of a Hybrid Solar Double-Chimney Power Plant for Generating Electricity and Distilled Water," Sustainability, MDPI, vol. 15(3), pages 1-20, February.
    8. Prieto, Alejandro & Knaack, Ulrich & Klein, Tillmann & Auer, Thomas, 2017. "25 Years of cooling research in office buildings: Review for the integration of cooling strategies into the building façade (1990–2014)," Renewable and Sustainable Energy Reviews, Elsevier, vol. 71(C), pages 89-102.
    9. Ming, Tingzhen & Wu, Yongjia & de_Richter, Renaud K. & Liu, Wei & Sherif, S.A., 2017. "Solar updraft power plant system: A brief review and a case study on a new system with radial partition walls in its collector," Renewable and Sustainable Energy Reviews, Elsevier, vol. 69(C), pages 472-487.
    10. Emad Abdelsalam & Feras Kafiah & Fares Almomani & Muhammad Tawalbeh & Sanad Kiswani & Asma Khasawneh & Dana Ibrahim & Malek Alkasrawi, 2021. "An Innovative Design of a Solar Double-Chimney Power Plant for Electricity Generation," Energies, MDPI, vol. 14(19), pages 1-21, September.

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