Wet cooling towers have high thermal efficiency and are cost-effective industrial cooling units, used in factories, in energy plants, and in the HVAC market. The working principle of the cooling towers is based on cooling of the hot process water with cold atmospheric air via cooling fills and water distribution systems. This study investigates the pressure losses and thermal performance of mechanical draft counterflow water cooling towers having different cooling fill heights. During the thermal performance tests, the pressure loss through cooling fill was separately measured for each condition. The variation of pressure losses with air velocity was plotted through cooling fills at different loading heights. Performance curves were obtained and compared as graphs relating the liquid–gas ratio (L/G) to the Merkel number for cooling fills at different heights between 1500 mm and 2400 mm. Although the lowest and the highest flow resistances were measured at fill heights of 1500 mm and 2400 mm, the lowest and the highest performances for the cooling tower were calculated at 1500 mm and 2400 mm, respectively.

湿式冷却塔具有很高的热效率，是经济高效的工业冷却装置，可用于工厂，发电厂和HVAC市场。冷却塔的工作原理基于通过冷却填料和水分配系统用冷的大气对热工艺水进行冷却。这项研究调查了具有不同冷却填充高度的机械通风逆流水冷却塔的压力损失和热性能。在热性能测试期间，针对每种情况分别测量了通过冷却填充产生的压力损失。通过在不同载荷高度下的冷却填充绘制压力损失随空气速度的变化。获得了性能曲线，并将其作为与液气比（L / G）到默克尔（Merkel）编号，用于在1500毫米至2400毫米之间的不同高度进行冷却填充。尽管在填充高度为1500 mm和2400 mm时测量了最低和最高的流动阻力，但冷却塔的最低和最高性能分别为1500 mm和2400 mm。