缠绕管换热器并管传热模型及实验  

Heat transfer model land experiment for paired-tubes wound-tube heat exchangers

作　　者：尹接喜 李清海[1] 施德强[1] 鲁钟琪[1] 杨瑞昌[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2000年第6期73-75,79,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金项目 !( 5 97760 43 )

摘　　要：为了研究缠绕管式换热器中的并管结构的传热规律 ,对并管金属管壁的微元段建立热平衡方程 ,以管壁温度对称分布及通过两并管焊接结构的热量相等为边界条件 ,提出了并管传热模型。在以空气为工质的并管传热实验台上 ,测定了管壁温度 ,然后与模型计算管壁温度比较 ,验证了该传热模型的有效性。该模型是多流体并管式缠绕管换热器设计计算的基础。在低温和深冷分离工程中 ,这种结构紧凑可实现多流体换热的缠绕管式换热器 。The structure of paired tubes can enhance the heat transfer efficiency due to the heat conduction through the soldered material between the paired tubes. This paper presents the theoretical analysis and experimental investigation of heat transfer model of wound tube heat exchangers. The energy equation for the metal wall and the symmetrical temperature distribution boundary condition were used to develop a heat transfer model for paired tubes in heat exchangers. An experimental investigation using air as the working medium verified the validity of model for the heat transfer model. The calculated results by the heat transfer model agree reasonably well with the experimental data. Wound tube heat exchangers, designed with this heat transfer model, are used widely in low temperature or cryogenic applications.

关 键 词：缠绕管式换热器 并管 传热模型 实验 

分 类 号：TK172[动力工程及工程热物理—热能工程]