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Air Equalizing Mechanism in Cooling Performance Improvement of Vertical Delta-Type Radiators

Author

Listed:
  • Tiefeng Chen

    (CHN Energy Pingluo Power Co., Ltd., Shizuishan 753000, China)

  • Qian Zhao

    (School of Energy and Power Engineering, Shandong University, Jing-Shi Road 17932#, Jinan 250061, China)

  • Yaoming Zhang

    (CHN Energy Pingluo Power Co., Ltd., Shizuishan 753000, China)

  • Chengjun Wang

    (CHN Energy Pingluo Power Co., Ltd., Shizuishan 753000, China)

  • Kaiming Li

    (CHN Energy Pingluo Power Co., Ltd., Shizuishan 753000, China)

  • Shixing Li

    (CHN Energy Pingluo Power Co., Ltd., Shizuishan 753000, China)

  • Longtao Quan

    (CHN Energy Pingluo Power Co., Ltd., Shizuishan 753000, China)

  • Yuanbin Zhao

    (School of Energy and Power Engineering, Shandong University, Jing-Shi Road 17932#, Jinan 250061, China)

Abstract

Based on the design and measured data of one actual tower, a three-dimensional numerical model for a natural draft dry cooling tower (NDDCT) was created and validated under constant heat load. This enabled the performance improvement mechanism of air equalizing on vertical delta-type radiators (VDRs) to be clarified by detailed analysis of key parameters, such as the exit water temperature, heat transfer coefficient, and mass airflow. Under the impact of typical ambient crosswind, all VDRs were retrofitted with air-side-equalizing devices. It was found that the exit water temperatures of the whole NDDCT decreased by 0.865 °C, 0.593 °C and 0.186 °C under the studied ambient crosswind speeds of 2.5 m/s, 4 m/s and 12 m/s, respectively. The performance improvement mechanism of air-side equalizing was investigated for three VDRs, which were located on the upwind, tower lateral, and downwind sides under crosswind impacts. Besides the studied VDRs, the performance of the neighboring VDRs behind them was also improved by the optimized aerodynamic field and the reduced hot wind recirculation around them. In addition, the average heat transfer coefficients of the VDRs were enhanced, which could lay the foundation for improving the cooling performance of thermodynamic devices with VDRs.

Suggested Citation

  • Tiefeng Chen & Qian Zhao & Yaoming Zhang & Chengjun Wang & Kaiming Li & Shixing Li & Longtao Quan & Yuanbin Zhao, 2024. "Air Equalizing Mechanism in Cooling Performance Improvement of Vertical Delta-Type Radiators," Energies, MDPI, vol. 17(5), pages 1-21, February.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:5:p:1111-:d:1346369
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    References listed on IDEAS

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    1. 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.
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