文献类型：期刊文献

中文题名：闭式冷却塔螺旋盘管传热传质性能

英文题名：Heat and mass transfer performance of helical coils in closed cooling tower

作者：王元华[1];闵瑾龙[1];陈自力[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2022

卷号：50

期号：6

起止页码：29

中文期刊名：化学工程

外文期刊名：Chemical Engineering(China)

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

语种：中文

中文关键词：闭式冷却系统;螺旋盘管;数值模拟;传热传质

外文关键词：closed cooling system;helical coils;numerical simulation;heat and mass transfer

摘要：闭式冷却塔因其节能、环保、洁净等优势,被广泛应用于冷却水清洁度要求较高及其他特殊工艺流体冷却的场合。以闭式冷却系统螺旋换热盘管模块为研究对象,从传热传质基本原理出发,采用Poppe分析法,构建螺旋换热盘管的传热传质数学模型及螺旋盘管管束单元的传热传质微分方程。设计和搭建闭式冷却塔实验测试平台,探究在空气流量1000—2300 m^(3)/h、喷淋密度1.09—2.72 kg/(m^(2)·s)、冷却水流量0.47—1.09 kg/s与冷却水进出口温度32—56℃时螺旋盘管传热传质性能的规律;拟合得到了管外水膜与空气的传质系数经验公式;编写螺旋换热盘管模块热力性能二维MATLAB求解程序。计算结果和实验结果对比表明:冷却水出口温度的最大误差为1.73%,喷淋水出口温度最大误差为5.79%,满足工程计算需求。
Closed cooling towers are widely used on occasions with high requirements for cooling water cleanliness and high temperature,because of its energy savings,environmental protection,cleanliness and other advantages.Taking the spiral heat exchange coil module of closed cooling system as the research object,the heat and mass transfer mathematical model of the spiral heat exchange coil was constructed by Poppe analysis according to the basic principle of heat and mass transfer,and the heat and mass transfer differential equations of the spiral coil bundle unit were obtained.The closed cooling tower experimental test platform was designed and built to investigate the spiral coil′s heat and mass transfer performance law when the airflow rate was 1000-2300 m^(3)/h,the spray density was 1.09-2.72 kg/(m^(2)·s),the cooling water flow rate was 0.47-1.09 kg/s,and the cooling water inlet temperature was 32-56℃.The empirical formula of the mass transfer coefficient between the water film outside the tube and the air was fitted.The two-dimensional MATLAB solution program for the thermal performance of the spiral heat exchanger coil module was written.Comparison of the calculation results with the experimental results shows that the maximum error in the cooling water outlet temperature is 1.73%and the maximum error in the spray water outlet temperature is 5.79%,meeting the engineering calculation requirements.