摘要
本文建立了作为冷凝模块的间壁式换热器冷热两侧气气传热过程的热力计算模型,并基于文献数据进行了计算验证;结合成熟的机械通风冷却塔数学模型,对带冷凝模块的机械通风冷却塔的高效节水消雾特性进行了系统研究,计算分析了带冷凝模块机械通风冷却塔的最大相对湿度曲线、成雾频率曲线、塔雾指数和节水率等;研究了冷凝模块冷热通道长度、冷热通道间距及冷凝模块进风口高度等对其冷凝节水消雾特性的影响。计算结果表明,增加冷凝模块冷热通道长度及冷凝模块进风口高度均可增强冷凝消雾冷却塔的冷凝节水消雾性能;增大冷凝模块冷热通道间距,减小了冷凝模块换热面积,导致冷凝消雾冷却塔的冷凝节水消雾性能减弱;指出可根据实际需求,设计冷凝模块冷热通道长度。研究结果可为机械通风冷却塔冷凝消雾的设计优化提供指导。
A thermal-hydraulic calculation model was established and validated based on literature data for condensation model,which was a type of recuperative heat exchanger used to transfer heat between cool air and hot air.By the validated thermal-hydraulic calculation model for mechanical draft wet cooling tower(MCT),the characteristics of high-efficiency condensation,water-saving and plume abatement for MCT were studied comprehensively.The maximum plume humidity curve,fogging frequency curve,tower plume index and water saving percentage were also presented and studied.All the effects of the cool channel length, the heat channel length,the channel spaces,and the condensation model air inlet height were calculated so as to study their effects on the condensing water saving and plume abatement of MCT.The study shows that by increasing the cool channel length,the heat channel length or the condensation model air inlet height, the water-saving and plume-abatement performance of MCT could be intensified.But increasing the channel spaces of condensation model,i.e. decreasing its total heat transfer area,would weaken the water saving and plume-abatement performance of MCT.And then both the cool channel length and the heat channel lenght could be designed sperately from the actual requirements for water saving and plume abatement.The results would provide suggestions for the optimization of MCT with condensation modules.
作者
李森
杨玉杰
刘忠超
赵元宾
LI Sen;YANG Yujie;LIU Zhongchao;ZHAO Yuanbin(CHN Energy Baoqing Coal Power&Chemical Co.,Ltd,,Shuangyashan 155600,China;School of Energy and Power Engineering,Shandong University,Ji'nan 250061,China;Ji'nan Lanchen Energy Technology Co.,Ltd.,Ji'nan 250101,China)
出处
《河北电力技术》
2022年第6期78-84,共7页
Hebei Electric Power
基金
国家能源集团国源电力有限公司科技创新项目(GSKJ-22-13)
山东省科技型中小企业创新能力提升工程计划项目(2022TSGC1026)。
关键词
机械通风冷却塔
冷凝模块
节水
消雾
mechanical wet cooling tower
condensation modules
water saving
plume abatement
