Experimental Research on Optimizing Inlet Airflow of Wet Cooling Towers under Crosswind Conditions

2017 International Conference on Power and Energy Engineering

Chen, You Liang^1 ; Shi, Yong Feng^1 ; Hao, Jian Gang^1 ; Chang, Hao^1 ; Sun, Feng Zhong^2

Huadian Electric Power Research Institute, No. 2 Xiyuan Ninth Road, Hangzhou

310030, China^1

Shandong University, No. 17923 Jingshi Road, Jinan

250061, China^2

关键词: Cooling efficiency;    Cooling performance;    Enhancement of heat transfer;    Experimental research;    Natural draft wet cooling towers;    Thermal Performance;    Uniformity of heat;    Water evaporation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/114/1/012005/pdf
DOI  :  10.1088/1755-1315/114/1/012005

来源: IOP

【 摘 要 】

A new approach of installing air deflectors around tower inlet circumferentially was proposed to optimize the inlet airflow and reduce the adverse effect of crosswinds on the thermal performance of natural draft wet cooling towers (NDWCT). And inlet airflow uniformity coefficient was defined to analyze the uniformity of circumferential inlet airflow quantitatively. Then the effect of air deflectors on the NDWCT performance was investigated experimentally. By contrast between inlet air flow rate and cooling efficiency, it has been found that crosswinds not only decrease the inlet air flow rate, but also reduce the uniformity of inlet airflow, which reduce NDWCT performance jointly. After installing air deflectors, the inlet air flow rate and uniformity coefficient increase, the uniformity of heat and mass transfer increases correspondingly, which improve the cooling performance. In addition, analysis on Lewis factor demonstrates that the inlet airflow optimization has more enhancement of heat transfer than mass transfer, but leads to more water evaporation loss.