基于焓差理论的带填料逆流闭塔热力性能分析  

Thermal Performance Analysis of Countercurrent Closed Cooling Tower with Packing based on Enthalpy Difference Theory

作　　者：钟桂强 高明[1] 章立新[1] 刘婧楠[1] ZHONG Gui-qiang;GAO Ming;ZHANG Li-xin;LIU Jing-nan(School of Energy and Power Engineering,Univenity of Shanghai for Science and Technology,Shanghai,China,200093)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《热能动力工程》2022年第8期75-82,共8页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(51976127)。

摘　　要：为了分析不同风量和喷淋水量对填料逆流闭式冷却塔热力性能的影响,建立和验证了带填料逆流闭式冷却塔热质交换的数学模型,基于焓差理论对模型计算的结果进行分析。结果表明:加入填料相当于对盘管区进口的喷淋水进行预冷,降低了喷淋水的平均温度,使带填料闭式冷却塔的冷却性能优于纯盘管闭式冷却塔;风量的增加可以提高带填料逆流闭式冷却塔和纯盘管逆流闭式冷却塔的热力性能,两种塔的冷却性能随风量增加的提升速率相同;喷淋水量的增加对纯盘管逆流闭式冷却塔的热力性能的影响较小,却可以较大幅度提高带填料逆流闭式冷却塔的热力性能。In order to analyze the effects of different air volume and spray water quantity on the thermal performance of countercurrent closed cooling tower with packing, the mathematical model of heat and mass exchange in countercurrent closed cooling tower with packing was established and verified. The enthalpy difference theory was used to analyze the calculation result of the model. The results show that the addition of packing is equivalent to precooling the spray water at the positive inlet of coil tube, reducing the average temperature of spray water, and making the cooling performance of closed cooling tower with packing be better than that of the closed cooling tower with pure coil tube.The increase of air volume can improve the thermal performance of countercurrent closed cooling tower with packing and closed cooling tower with pure coil tube, the cooling performance of two towers increases with air volume at the same rate. The increase of spray water quantity has little impact on the thermal performance of the countercurrent closed cooling tower with pure coil tube, but it can improve that of the countercurrent closed cooling tower with packing greatly.

关 键 词：带填料逆流闭式冷却塔 热力性能 风量 喷淋水量 

分 类 号：TK124[动力工程及工程热物理—工程热物理]