Influence of Crosswind on Three-dimensional Thermal Performance of Mechanical Draft Cooling Tower Cluster with High-level Water Collecting Device
To investigate the influence of ambient crosswind on the thermal performance of the mechani-cal draft cooling tower cluster with high-level water collecting device,a three-dimensional numerical mod-el for the back-to-back cooling tower cluster consisting of 10 cooling towers was established,and the vari-ation laws of ventilation,hot air recirculation and heat exchange characteristics of cooling tower cluster under different ambient air velocities and directions were analyzed.Results indicate that the transverse vortices inside and outside the cooling tower induced by ambient crosswind have a deterioration effect on the thermal characteristics of cooling tower cluster;under the air velocity of 10 m/s,the environmental crosswind reduces the average air flow of the cluster by up to 23.0%;the 45° crosswind results in the most serious hot air recirculation in cooling tower cluster,which increases the air intake air flow tempera-ture and moisture content by 2.3%and 6.3%,respectively;due to the transverse vortices and hot air recirculation,the ambient crosswind exerts an adverse effect on the heat transfer characteristics of cooling tower cluster,and the most unfavorable crosswind direction of 45° causes a maximum increase of 1.1℃in the outlet water temperature.
mechanical draft cooling tower cluster with high-level water collecting deviceambient cr-osswindheat and mass transferhot air recirculationnumerical calculation
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