布液不均对横流热源塔传热传质性能的影响
Effect of Non-uniform Liquid Distribution on Heat and Mass Transfer Performance in a Cross-flow Heating Tower

本文建立了横流热源塔的传热传质模型，研究了不同溶液流量与风量工况下，布液不均对热源塔性能的影响。结果表明：热源塔总换热量与布液均匀分布系数σ成倒“U”型曲线关系，随着布液均匀分布系数绝对值|σ|的增大而减小，当溶液质量流量为1.4 kg/s，σ=0~1时，总换热量从13.60 kW降到12.01 kW，降低了11.69%；热源塔传热传质性能与其布液均匀分布系数的大小有关，与布液均匀分布系数的方向无关。
In this paper, the mathematical model and experimental platform of the cross-flow heating tower are established. The effect of non-uniform liquid distribution on heat and mass transfer performance in the cross-flow heating tower is studied under different fluid flow and air volume conditions. The results show that the total heat exchange has an inverted “U” curve relation to the uniformity coefficient of liquid distribution,σ. The higher the absolute value of the uniformity coefficient of liquid distribution,|σ| is, the worse the total heat exchange performs. When the mass flow rate of the solution is 1.4 kg/s and σ=0-1, the total heat exchange capacity decreases from 13.60 kW to 12.01 kW(a decrease of 11.69%). The heat and mass transfer performance of the cross-flow heat source tower is related to the size of σ, and has nothing to do with the direction of σ