钢管密闭塔水平圆管降膜热质传递规律研究  

Study on Heat and Mass Transfer Characteristics of Falling Film in Steel Tube Closed Tower

作　　者：李志恒 李秋桐 吕佳文 孙永毅 龚路远 朱晓静[1] LI Zhiheng;LI Qiutong;LV Jiawen;SUN Yongyi;GONG Luyuan;ZHU Xiaojing(Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education,Dalian,Liaoning 116024,China;Dalian Spindle Environmental Facilities Co.,Ltd.,Dalian,Liaoning 116600,China)

机构地区：[1]海洋能利用与节能教育部重点实验室,辽宁大连116024 [2]大连斯频德环境设备有限公司,辽宁大连116600

出　　处：《自动化应用》2024年第15期272-275,共4页Automation Application

摘　　要：冷却塔通过热质交换将高温介质的热量从系统排放到大气,从而达到冷却效果。对钢管密闭式冷却塔水平圆管降膜蒸发器传热传质的影响因素进行研究与分析,搭建逆流式密闭塔水平圆管降膜传热传质性能研究可视化实验台,主要研究气流速度、喷淋密度、喷淋水温度对横管降膜蒸发传热传质性能的影响。在给定实验工况下,得出当最佳喷淋密度为0.0416 kg/(m·s),对应的最大总换热系数为1625.01 W/(m^(2)·K);当最佳喷淋水温度为16.82℃,对应的最大总换热系数为1736.86 W/(m^(2)·K);最佳气流风速在1~2 m/s之间。The cooling tower can discharge the heat of high temperature medium from the system to the atmosphere through heat and mass exchange,so as to achieve the cooling effect.In this paper,the steel tube closed cooling tower horizontal circular tube falling film evaporator heat and qualitative research and analysis of the factors which influence building counter-flow closed tower horizontal circular tube falling film heat and mass transfer performance study visualization test bench,the main research air velocity,the density of spray,spray water temperature on the horizontal tube falling film evaporation heat transfer and mass transfer performance.Under the given experimental conditions,the optimal spray density is 0.0416 kg/(m·s),and the corresponding maximum total heat transfer coefficient is 1625.01 W/(m^(2)·K).When the optimal spray water temperature is 16.82℃,the corresponding maximum total heat transfer coefficient is 1736.86 W/(m^(2)·K).The optimal airflow speed is between 1~2 m/s.

关 键 词：钢管密闭塔 传热传质 逆流气流 

分 类 号：TB65[一般工业技术—制冷工程] TK124[动力工程及工程热物理—工程热物理]