结构参数对含湿烟气余热回收换热器换热特性的影响研究  

Influence of Structure Parameters on Heat Transfer Characteristics of Wet Exhaust Gas in Waste Heat Recovery Heat Exchanger

作　　者：王进仕[1,4] 李杨 王勇[2] 李建峰[3] 张晓 王憨鹰 周刚[2] 胡广涛 李国杰[4] 韩小渠 WANG Jin-shi;LI Yang;WANG Yong;LI Jian-feng;ZHANG xiao;WANG Han-ying;ZHOU Gang;HU Guang-tao;LI Guo-jie;HAN Xiao-qu(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China;Shaaxi Sijichun Clean Heat Source Co.,Ltd.,Xi’an 710061,China;School of Energy Engineering,Yulin University,Yulin 719000,China)

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]西安热工研究院有限公司,陕西西安710054 [3]陕西四季春清洁热源股份有限公司,陕西西安710061 [4]榆林学院能源工程学院,陕西榆林719000

出　　处：《榆林学院学报》2022年第4期1-7,共7页Journal of Yulin University

基　　金：国家自然科学基金项目(51806159)。

摘　　要：建立了含湿混合气体横掠水平管束对流冷凝换热模型,对含湿烟气余热回收换热器的换热特性开展了理论研究,分析了结构参数的影响规律。结果表明:随着管排数的增加,换热器平均热流密度呈现先增大后基本不变的趋势,平均换热系数先增大后减小,存在一个最佳管排数使余热回收效率最高;增大管排的横向间距、减小管排纵向间距可以使换热效果提高;当换热管径从30 mm减小到11.25 mm时,换热器平均换热系数增大45.7%,同时换热器的占用空间减小62.5%。In this paper,a convective-condensation heat transfer model for the wet mixture gas cross horizontal tube bundles was established.Heat transfer characteristics of wet exhaust gas in waste heat recovery heat exchanger was theoretically studied,and the influence of structure parameters was analyzed.The results show that,with the increase in the number of rows,the average heat flux increases firstly and then changes slowly,and the average heat transfer coefficient increases firstly and then reduces.There exists an optimal number of rows for the highest waste heat recovery efficiency.Increasing the lateral spacing of the pipe row and reducing the longitudinal spacing can improve the waste heat recovery.When the diameter of tubes is reduced from 30 mm to 11.25 mm,the average heat transfer coefficient increases by 45.7%,while the space occupied is reduced by 62.5%.

关 键 词：余热回收 含湿烟气 换热器 换热特性 结构参数 

分 类 号：TK172[动力工程及工程热物理—热能工程]