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Thermal performance of cross flow cooling towers in variable wet bulb temperature

机译：可变湿球温度下错流冷却塔的热性能

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摘要

Cooling towers are widely used in most industrial units to reject waste heat to the atmosphere. Wet towers are usually designed to operate in hot and dry weather conditions with narrow range of wet bulb temperature, but many cooling towers are required to operate in weather condition with large variation of wet bulb temperature which strongly affects the thermal performance of the towers. In this paper a conventional mathematical model is used to predict the thermal behavior of an existing cross flow tower under variable wet bulb temperature and the results are compared with experimental data in various operating conditions. Available fill characteristic curve of the tower is obtained to estimate its departure from the design conditions. It is found that when the wet bulb temperature increases, the approach, range and evaporation loss would increase considerably. Variation of evaporation loss versus wet bulb temperature was estimated. Finally the effect of placing an impact separator in front of air louvers on thermal performance of the tower is investigated.
机译：冷却塔广泛用于大多数工业设备中，以将废热排至大气中。湿塔通常设计为在湿球温度范围狭窄的炎热和干燥天气条件下运行，但许多冷却塔需要在湿球温度变化较大的天气条件下运行，这会严重影响塔的热性能。在本文中，使用常规数学模型来预测现有横流塔在可变湿球温度下的热行为，并将结果与​​各种操作条件下的实验数据进行比较。获得塔的可用填充特性曲线，以估计其与设计条件的偏离。发现当湿球温度升高时，进近，范围和蒸发损失将显着增加。估计蒸发损失与湿球温度之间的变化。最后，研究了在空气百叶窗前放置冲击分离器对塔架热性能的影响。

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