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设计干、湿串联运行的复合式冷却塔,对其换热性能及能耗做了研究,并进行了复合式冷却塔与闭式冷却塔的耗水性能对比以及能耗对比研究。实验结果表明,复合式冷却塔换热效果受截面风速影响较大,综合换热效果在截面风速为3.5 m/s时达到最佳;在截面风速处于2.5~4.5 m/s时,复合式冷却塔的翅片管大大增强了闭式冷却塔的换热效果;复合式冷却塔与闭式冷却塔同负荷下,由于复合式冷却塔的翅片管承担了部分负荷,因此能够减少循环喷淋水量以及循环喷淋水的蒸发,虽然翅片管使得阻力增加,但循环喷淋水量的减少使得水对空气的流动阻力减小,因此复合式冷却塔总阻力稍有增加。
The composite cooling tower with dry and wet series operation was designed. The heat transfer performance and energy consumption were studied. The comparison of water consumption performance and energy consumption between the composite cooling tower and the closed cooling tower was carried out. The experimental results show that the heat transfer efficiency of the composite cooling tower is greatly affected by the cross-section wind speed, and the comprehensive heat exchange effect is best when the cross-section wind speed is 3.5 m / s. When the cross-section wind speed is 2.5-4.5 m / s, The finned tube of the tower greatly enhances the heat transfer effect of the closed cooling tower; the composite cooling tower and the closed cooling tower can reduce the circulating spray because of the partial load on the finned tube of the composite cooling tower under the same load The amount of water and the evaporation of circulating spray water increase the overall resistance of the hybrid cooling tower, although the resistance increases with the use of finned tubes. However, the reduction in circulating spray water reduces the resistance of water to air flow.