新型双管程换热器壳程的流动与传热机理分析  

Analysis of flow and heat transfer mechanism on the shell side of a new dual tube heat exchanger

作　　者：徐义程 汪世益[1] XU Yicheng;WANG Shiyi(School of Mechanical Engineering,Anhui University of Technology,Maanshan 243000,China)

机构地区：[1]安徽工业大学机械工程学院,安徽马鞍山243000

出　　处：《陕西理工大学学报(自然科学版)》2025年第1期1-10,共10页Journal of Shaanxi University of Technology:Natural Science Edition

摘　　要：为了提升传统双管程管壳式换热器的传热效率,提出了一种低成本、高性能的新型双管程管壳式换热器,建立单管程换热器、普通双管程换热器、新型双管程换热器数值计算模型,从数值模拟和理论计算的角度研究了3种换热器内部流体的流动与换热机理。研究结果发现,在壳程质量流量为2.9~6.8 kg/s时,相比于单管程换热器,新型双管程换热器的换热量下降12%~21%、压降下降29%、效能评价系数上升11%~24%。理论计算发现,新型双管程换热器具有比普通双管程换热器更低的材料成本,且随着管数n的增加,新型双管程换热器的壳程湍流程度越来越高。研究结果可为新型双管程换热器的结构开发和性能优化提供指导。In order to improve the heat transfer efficiency of traditional double tube shell heat exchangers,a new low-cost and high-performance double tube shell heat exchanger is proposed.Numerical calculation models were established for single tube side heat exchangers,ordinary double tube side heat exchangers,and new double tube side heat exchangers.The flow and heat transfer mechanisms of the internal fluid in three types of heat exchangers were studied from the perspectives of numerical simulation and theoretical calculation.The research results show that when the shell-side mass flow rate ranges from 2.9 kg/s to 6.8 kg/s,the new dual-pass heat exchanger exhibits a decrease in heat transfer by 12%to 21%,a reduction in pressure drop by 29%,and an increase in the performance evaluation coefficient by 11%to 24%compared to a single-pass heat exchanger.Theoretical calculations have found that the new dual tube heat exchanger has lower material costs than ordinary dual tube heat exchangers,and as the number of tubes increases,the turbulence level on the shell side of the new dual tube heat exchanger becomes higher.The research findings can provide guidance for the structural development and performance optimization of new dual tube heat exchangers.

关 键 词：双管程管壳式换热器 强化传热 计算流体力学 效能评价系数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]