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The cooling performance of a natural draft dry cooling tower under crosswind and an enclosure approach to cooling efficiency enhancement

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  • Wang, Weiliang
  • Zhang, Hai
  • Liu, Pei
  • Li, Zheng
  • Lv, Junfu
  • Ni, Weidou

Abstract

Cooling performance of a natural draft dry cooling tower degrades in presence of crosswind. Upon an in service natural draft dry cooling tower of a 660MW unit in China, a computational fluid dynamics approach with validation is adopted to investigate the cooling performance at various wind speeds. The first order viscous force based resistance mechanism is used in simulating the air flow resistance for the radiators. Numerical results confirm previous findings that the cooling performance of the natural draft dry cooling tower degrades with the increment of wind velocity when wind velocity is higher than 4m/s, but the performance reduction is relatively less. The circumferential non-uniform ventilation and the vortices inside the tower contribute the most to the degrading of the cooling performance when crosswind is present. To enhance the overall cooling performance, an enclosure with an opening at the windward side is proposed to increase the pressure level outside the side and back radiators. Numerical results show that such an enclosure could enhance the cooling performance at all investigated wind speeds, with 36% increase of the ventilation rate and about 7°C decrement of the cycling water temperature at 20m/s.

Suggested Citation

  • Wang, Weiliang & Zhang, Hai & Liu, Pei & Li, Zheng & Lv, Junfu & Ni, Weidou, 2017. "The cooling performance of a natural draft dry cooling tower under crosswind and an enclosure approach to cooling efficiency enhancement," Applied Energy, Elsevier, vol. 186(P3), pages 336-346.
    • Handle: RePEc:eee:appene:v:186:y:2017:i:p3:p:336-346
    DOI: 10.1016/j.apenergy.2016.02.007
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    3. Sun, Yubiao & Guan, Zhiqiang & Gurgenci, Hal & Wang, Jianyong & Dong, Peixin & Hooman, Kamel, 2019. "Spray cooling system design and optimization for cooling performance enhancement of natural draft dry cooling tower in concentrated solar power plants," Energy, Elsevier, vol. 168(C), pages 273-284.
    4. Huiqian Guo & Yue Yang & Tongrui Cheng & Hanyu Zhou & Weijia Wang & Xiaoze Du, 2021. "Tower Configuration Impacts on the Thermal and Flow Performance of Steel-Truss Natural Draft Dry Cooling System," Energies, MDPI, vol. 14(7), pages 1-17, April.
    5. Wu, Tao & Ge, Zhihua & Yang, Lijun & Du, Xiaoze, 2019. "Transient behavior of the cold end system in an indirect dry cooling thermal power plant under varying operating conditions," Energy, Elsevier, vol. 181(C), pages 1202-1212.
    6. Suárez de la Fuente, Santiago & Larsen, Ulrik & Pawling, Rachel & García Kerdan, Iván & Greig, Alistair & Bucknall, Richard, 2018. "Using the forward movement of a container ship navigating in the Arctic to air-cool a marine organic Rankine cycle unit," Energy, Elsevier, vol. 159(C), pages 1046-1059.
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    8. Zhao Li & Huimin Wei & Tao Wu & Xiaoze Du, 2021. "Optimization for Circulating Cooling Water Distribution of Indirect Dry Cooling System in a Thermal Power Plant under Crosswind Condition with Evolution Strategies Algorithm," Energies, MDPI, vol. 14(4), pages 1-17, February.
    9. Mohan Liu & Lei Chen & Kaijun Jiang & Xiaohui Zhou & Zongyang Zhang & Hanyu Zhou & Weijia Wang & Lijun Yang & Yuguang Niu, 2021. "Investigation of Thermo-Flow Characteristics of Natural Draft Dry Cooling Systems Designed with Only One Tower in 2 × 660 MW Power Plants," Energies, MDPI, vol. 14(5), pages 1-18, February.
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    12. Kong, Yanqiang & Wang, Weijia & Yang, Lijun & Du, Xiaoze, 2020. "Energy efficient strategies for anti-freezing of air-cooled heat exchanger," Applied Energy, Elsevier, vol. 261(C).

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