Study on Thermal Performance of Large Natural Draft Cooling Tower

Wu Jian; Xie Yue; Hu Sanji

doi:10.3969/j.issn.0253-4339.2019.02.100

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Study on Thermal Performance of Large Natural Draft Cooling Tower

更新时间：2024-07-18

- Study on Thermal Performance of Large Natural Draft Cooling Tower
- Journal of Refrigeration Vol. 40, Issue 2, (2019)
- 作者机构：
  
  1. 西安建筑科技大学环境与市政工程学院
  2. 西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2019.02.100
  CLC：
- Published：2019
- 稿件说明：
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Wu Jian, Xie Yue, Hu Sanji. Study on Thermal Performance of Large Natural Draft Cooling Tower[J]. Journal of refrigeration, 2019, 40(2).
DOI：

Wu Jian, Xie Yue, Hu Sanji. Study on Thermal Performance of Large Natural Draft Cooling Tower[J]. Journal of refrigeration, 2019, 40(2). DOI： 10.3969/j.issn.0253-4339.2019.02.100.

摘要

为探求大型自然通风冷却塔热力性能及优化方向，本文对某1 000 MW燃煤机组配用的淋水面积为12 000 m2的大型自然通风冷却塔热力性能进行实验研究，利用气水比和冷却数拟合该塔的热力性能方程式并得到测试塔冷却数的修正系数，给出该塔内实测风温的分布，用不同阻力系数公式计算出塔水温。结果表明：填料等高布置的模拟冷却塔与填料不等高布置的工业塔的修正系数为1.047～1.081；填料不等高布置的工业塔塔内风温均方根误差为0.56～0.67 ℃，其值小于填料等高布置的相应冷却塔，故填料的不等高布置能强化冷却塔的冷却性能；进塔水量大时，可采用阻力经验系数公式快速计算出塔水温，为大型自然通风冷却塔的设计与改造提供参考。

Abstract

To explore the thermal performance and optimization direction of a large natural draft cooling tower

the thermal performance of a large natural draft cooling tower with a watering area of 12 000 m2 was tested for a 1 000 MW coal-fired unit. The gas-water ratio and cooling number were used to fit the results

and thermal performance equation and correction coefficient of the cooling test tower were obtained. The distribution of the measured wind temperature in the tower was given. The water temperature of the tower was calculated using different resistance coefficient formulas. The results showed that the correction coefficient of industrial towers with equal heights of packing and those with unequal packings was 1.047–1.081. The root mean square error of the air temperature in the industrial towers with unequal heights of packings was 0.56–0.67 ℃

which was less than the corresponding cooling tower with equal heights of packing. Thus

the cooling performance of the cooling tower could be enhanced by the unequal arrangement of the packing. The water temperature of the tower could be quickly calculated by using the empirical formula of resistance under the condition that the amount of water entering the tower was large

which provides a reference for the design and modification of large natural draft cooling towers.

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Related Institution

School of Energy&Environment, Zhongyuan University of Technoiogy

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