蒸发冷却空气参数计算及其在湿式蒸发冷却塔节水节能中的应用
摘要：针对湿式蒸发冷却塔蒸发量大、排污量大、冬季雾羽大等弊端，介绍了盘管型、填料型及复合型蒸发冷却塔气—水两相传热传质计算公式，阐明了气—水传热传质过程空气温度、湿度、焓值等参数精确计算方法。结合实时进塔空气温度、含湿量和质量流量，计算同一时间段的循环水蒸发量、排污量和补水量，结果表明：在相同相对湿度下，干球温度34℃对应的循环水蒸发量、补水量比干球温度20℃对应的量减小15%；在相同湿球温度下，干球温度34℃对应的循环水蒸发量、补水量比干球温度20℃对应的量增大48.8%。因此，蒸发冷却过程中空气参数的精确计算可实现湿式蒸发冷却塔蒸发量、补水量及排污量的实时计算及调节，并进而推进其节水消雾和节能减排优化。
Abstract:In view of the disadvantages of wet evaporative cooling tower such as large water evaporation, large sewage discharge, and large fog plume in winter, this paper summarized the calculation formulas of air parameters in the air-water two-phase heat and mass transfer for the coil type, the filling type and composite type evaporative cooling tower. Combined with real-time inlet air temperature, moisture content and mass flow, the accurate calculation method of air temperature, moisture content, enthalpy and other parameters in the process of air-water heat and mass transfer were further clarified. The water evaporation rate, discharge rate and water saving amount were calculated at the same time period. The calculation results show that under the same inlet air relative humidity, the water evaporation rate and make-up rate corresponding to dry bulb temperature of 34℃ are 15% less than those corresponding to dry bulb temperature of 20℃. Under the same wet bulb temperature, the water evaporation rate and make-up water rate corresponding to dry bulb temperature of 34℃ increase by 48.8% than that corresponding to dry bulb temperature of 20℃. Therefore, the accurate calculation of air parameters in the evaporative cooling process, could avail the real-time calculation and regulation of evaporation rate, water make-up rate, discharge rate, and promote the optimization of water saving, plume abatement, energy saving and discharge reduction for wet evaporative cooling tower.
标题：蒸发冷却空气参数计算及其在湿式蒸发冷却塔节水节能中的应用
title:Calculation of Evaporative Cooling Air Parameters and Relevant Applications in Wet Evaporative Cooing Tower Water and Energy Saving
作者：王志明, 潘欣全, 何伟男, 谭益坤, 赵元宾
authors:Zhiming WANG, Xinquan PAN, Weinan HE, Yikun TAN, Yuanbin ZHAO
关键词：湿式蒸发冷却塔,热质交换,节水优化,节能减排,消雾特性,
keywords:wet evaporative cooling tower,heat and mass transfer,water saving optimization,energy saving and discharge reduction,plume abatement characteristics,
发表日期：2021-10-31
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