Numerical Analysis of the Cooling Performance of Wet Cooling Tower With Cross Wall

To clarify the effect of cross wall on the cooling performance of natural draft counter-flow wet cooling tower under crosswind conditions,the three-dimensional numerical model of wet cooling tower with cross wall was set up based on CFD code FLUENT.The air dynamic field inside and around tower was simulated numerically and the characteristics of tower inner heat and mass transfer between water and air were also analyzed.Under two typical crosswind directions,the effect of cross wall on rain zone air dynamic field,water temperature contours of water pond surface,air mass flow rate,the mean heat and mass transfer coefficients of each zone,the water temperature drop in each zone and the total water temperature drop was analyzed.It can be known that the cross wall can improve the total cooling performance of tower under low speed crosswind.And the cooling tower performance can also be improved if the crosswind direction is parallel to the windward first plate under high speed crosswind,but it is degraded if the angle between the high speed crosswind direction and the windward first plate is 45°.The gab-cross-wall can reduce the unfavorable effect of no-gab-cross-wall caused by variable crosswind direction under high speed crosswind effectively.