Effect of fill layout and water flow rate distribution on the performance for cooling tower

被引：0
|
作者：
Wang M. [1 ]
Wang J. [1 ]
Zhang C. [2 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
[2] Department of Power Engineering and Water Conservancy, GuoHua Ninghai Power Plant, Ningbo, 315000, Zhejiang
来源：
Wang, Jin (14115313@bjtu.edu.cn) | 2018年 / Harbin Institute of Technology卷 / 50期
关键词：
Cooling performance; Fill non-uniform layout; Non-uniform water flow rate distribution; Super-large cooling tower; Three dimensional numerical simulation;
D O I：
10.11918/j.issn.0367-6234.201803100
中图分类号：
学科分类号：
摘要：
In order to identify the effect of fill layout and water flow rate distribution on the cooling performance of cooling tower, a three-dimensional numerical model was established based on prototype of No.6 Cooling Tower in the Second Phase of Guohua Ninghai Power Plant in Zhejiang Province. Loading the mass, momentum, energy equation was computed by using user defined function. The comparision with the field measurement data proves the accuracy of the numerical calculation result. The effects of three kinds of fills and five kinds of fills layouts on cooling performance of super-large cooling tower weve compared and analyzed. It is found that compared with biphasic wave and double oblique wave, the cooling efficiency of S wave is optimal. For S wave, based on the dimensionless radius ř≤0.39 (inner zone), 0.39< ř≤0.70 (middle zone) and 0.70<ř≤1 (outer zone), the outlet water temperature of non-uniform layout 1.25-1.5-1.25 m is 0.66 K lower than the outlet water temperature of the uniform fill layout pattern 1.5 m. It is shown that the decreased fill height in inner and outer zones results in a higher air velocity and more uniform distribution of air velocity. In addition, increasing the salinity of cooling water made the outlet water temperature of three kinds of fills improve by about 2 K. It is indicated that the rise of outlet water temperature is related to the nature of seawater itself, and fill types has little impact on outlet water temperature. © 2018, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.
引用
收藏
页码：124 / 131
页数：7
相关论文
共 25 条
  • [1] Williamson N., Behnia M., Armfield S., Comparison of a 2D axisymmetric CFD model of natural draft wet cooing tower and a 1D model, International Journal of Heat and Mass Transfer, 51, 9-10, (2008)
  • [2] Merkel F., Verdunstungskühlung, (1925)
  • [3] Poppe M., Rogener H., Berechnung vonruckkuhlwerken, (1991)
  • [4] Kloppers J., Kroger D., Loss coefficient correlation for wet cooling tower fills, Applied Thermal Engineering, 23, 17, (2003)
  • [5] Zhao Y., Yang Z., Gao M., Et al., Impact of fill non-uniform layout on cooling performance of large-scale cooling towers, Proceedings of the Chinese Society for Electrical Engineering, 20, 33, (2013)
  • [6] Huang D., Du C., Numerical optimization on arrangement of the filling material and spraying water in cooling tower, Chinese Journal of Applied Mechanics, 17, 1, (2000)
  • [7] Jin T., Zhang L., Tang L., Et al., Three-dimensional numerical study on water-distribution optimization in a natural draft wet cooling tower, Proceedings of the Chinese Society for Electrical Engineering, 32, 2, (2012)
  • [8] Zhao S., Feng C., Gu J., Et al., Water distribution design for large natural draft counter flow cooling tower, Electric Power Construction, 1, 30, (2009)
  • [9] Zheng S., Jin T., Luo K., Et al., Three-dimensional numerical simulation on thermal performance in counter flow natural draft cooling tower, Journal of Central South University (Science and Technology), 9, 44, (2013)
  • [10] Williamson N., Numerical modelling of heat and mass transfer and optimization of a natural draft wet cooling tower, (2008)
123