文章基本信息

标题：Numerical simulation on influence of noise barrier on thermal performance for natural draft wet cooling towers
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作者：Zhirui Zheng ; Deying Zhang ; Lei Jiang 等
期刊名称：Case Studies in Thermal Engineering
印刷版ISSN：2214-157X
电子版ISSN：2214-157X
出版年度：2021
卷号：28
页码：101403
语种：English
出版社：Elsevier B.V.
摘要：The noise barrier installed around the natural draft wet cooling tower can reduce the operating noise, but it will lead to an adverse effect on the thermal performance of the tower. In order to study the influence of noise barrier on the thermal performance, a three-dimensional numerical model of the tower with noise barrier was established in this paper, and the influence of ventilation shutters on the thermal performance are also investigated. In this study, the outlet water temperature t2 and the ventilation rate G are selected to evaluate the thermal performance of the cooling tower. The simulation results showed that noise barrier destroys the uniformity of the circumferential air intake of cooling tower, reduces the G of the tower, and weakens the cooling capacity. The overall thermal performance deteriorates with the increase of the height H, and the central angle θ of the noise barrier, but improves with the increase of its distance from the tower L. The maximum t2 is 28.25 °C, which is about 0.36 °C higher than that condition without noise barrier, the minimum G reduces to 10235.50 kg/s, which is about 6.8% less than that without noise barrier. Additionally, the ventilation shutters installed on the noise barrier can weaken the adverse effects of noise barrier on the thermal performance. When the ventilation shutters are installed on the middle of the noise barrier and the louvers angle β is 90°, the improvement to the adverse effect reaches to the optimum value. Compared with that condition without ventilation shutters, the G reaches to 10501.95 kg/s, increases by 2.6%, and the t2 is 28.08 °C, reduces by 0.17 °C.