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Numerical simulation on the enhancement of heat transfer performance by deflector plates for the mechanical draft cooling towers

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  • Wang, Youhao
  • Yang, Jichong
  • Xu, Qinghua
  • Zhang, Qiang
  • He, Suoying
  • Gao, Ming

Abstract

To optimize the uneven distribution of flow field in the mechanical draft cooling towers, four cases for deflector plates are proposed. Based on the analysis of the velocity and temperature fields in the tower, the effect of the deflector plates to strengthen the local heat transfer is investigated. In addition, the thermal and ventilation performance is investigated with different fan speed and circulating water flow rate. The results show that the arrangement of the deflector plates can guide the ambient air into the inefficient heat transfer region. Of the four cases studied, Case 4 has the optimal performance. Compared with the original tower, the outlet water temperature reduces by 0.22 °C, the cooling efficiency increases by 1.53%, and the Merkel number increases by 6.35%, while the ventilation rate keeps at 699 m3/s. The thermal performance of Case 4 is better than that of the original tower when only the fan speed or the circulating water flow rate are changed, and it is improved with the increase of the fan speed and the decrease of the circulating water flow rate. This paper can guide the optimization of enhanced local heat transfer in mechanical draft cooling towers.

Suggested Citation

  • Wang, Youhao & Yang, Jichong & Xu, Qinghua & Zhang, Qiang & He, Suoying & Gao, Ming, 2023. "Numerical simulation on the enhancement of heat transfer performance by deflector plates for the mechanical draft cooling towers," Energy, Elsevier, vol. 283(C).
    • Handle: RePEc:eee:energy:v:283:y:2023:i:c:s0360544223025744
    DOI: 10.1016/j.energy.2023.129180
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    References listed on IDEAS

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    1. Yu, J.H. & Qu, Z.G. & Zhang, J.F. & Hu, S.J. & Guan, J., 2022. "Comprehensive coupling model of counter-flow wet cooling tower and its thermal performance analysis," Energy, Elsevier, vol. 238(PB).
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