基于数值模拟的气相换热器壳程结构优化与试验  

Shell-side structure optimization and experiment of gas-phase heat exchanger based on numerical simulation

作　　者：郑宇 万霖[1,2] 车刚 刘季君[3] 王洪超 ZHENG Yu;WAN Lin;CHE Gang;LIU Jijun;WANG Hongchao(Engineering College,Heilongjiang Bayi Agricultural University,Daqing,Heilongjiang 163319,China;Heilongjiang Agricultural Machinery Intelligent Equipment Key Laboratory,Daqing,Heilongjiang 163319,China;Heilongjiang Beidahuang Rice Industry Group Co.,Ltd.,Harbin,Heilongjiang 150090,China)

机构地区：[1]黑龙江八一农垦大学工程学院,黑龙江大庆163319 [2]黑龙江省农机智能装备重点实验室,黑龙江大庆163319 [3]黑龙江省北大荒米业集团有限公司,黑龙江哈尔滨150090

出　　处：《食品与机械》2025年第2期85-93,共9页Food and Machinery

基　　金：黑龙江省自然科学基金项目(编号:LH2022E098);国家重点研发计划项目(编号:2021YFD2100901)。

摘　　要：[目的]对气相旋转换热器进行结构优化,改善单叶片壳程结构气相旋转换热器换热效率较低的问题。[方法]通过建立简化模型和CFD法,对3种壳程结构换热器性能进行分析。以壳程压降和对流换热系数为试验指标,探究工作圈数、叶片高度、叶片宽度等主要参数对壳程压降和对流换热系数的影响规律,并进行优化与验证。[结果]六叶片结构换热器的总体性能较好,壳程压降降低了7%~8%,对流换热系数提高了8%~10%。当工作圈数为3、叶片高度为45.05 mm、叶片宽度为4.79 mm时,六叶片结构换热器的最小壳程压降为6.95 kPa,较优化前降低了15%~21%;最大对流换热系数为183.35 W(/m~2·K),较优化前提高了10%~12%。壳程压降模拟值与试验值误差≤6%,对流换热系数模拟值与试验值误差≤5%,优化结果可靠。[结论]在优化后的壳程结构下,气相换热器具有良好的换热性能。[Objective]To optimize the structure of gas-phase rotary heat exchanger and address low heat transfer efficiency of gas-phase rotary heat exchanger with single-blade shell-side structure.[Methods]The performance of three kinds of shell-side heat exchangers is analyzed by establishing a simplified model and computational fluid dynamics(CFD)method.Taking the shell-side pressure drop and convective heat transfer coefficient as the test indexes,this study explores the influence of main parameters such as the number of working circles,blade height,and blade width on the shell-side pressure drop and convective heat transfer coefficient and conducts optimization and verification.[Results]The overall performance of the six-blade heat exchanger is better,with the shell-side pressure drop reduced by 7%~8%and the convective heat transfer coefficient increased by 8%~10%.In the case of 3 working circles,the blade height of 45.05 mm,and the blade width of 4.79 mm,the minimum shell-side pressure drop of the six-blade heat exchanger is 6.95 kPa,which is 15%~21%lower than that before optimization.The maximum convective heat transfer coefficient is 183.35 W/(m2·K),which is 10%~12%higher than that before optimization.The error between the simulated value and the experimental value of shell-side pressure drop is≤6%,and the error between those of the convective heat transfer coefficient is≤5%.The optimization results are reliable.[Conclusion]With the optimized shell-side structure,the gas-phase heat exchanger has good heat transfer performance.

关 键 词：数值模拟 换热器 性能分析 结构优化 

分 类 号：TQ0[化学工程]