氢正仲转化耦合流动换热板翅式换热器研究  

Study on Hydrogen Ortho-Para Conversion Coupled with Flow and Heat Transfer of the Plate Fin Heat Exchanger

作　　者：徐攀 文键[1] 厉彦忠[1] 王斯民[2] 屠基元 XU Pan;WEN Jian;LI Yanzhong;WANG Simin;TU Jiyuan(School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China;School of Engineering, RMIT University, Victoria 3083, Melbourne, Australia)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]西安交通大学化学工程与技术学院,西安710049 [3]皇家墨尔本理工大学工学院,澳大利亚墨尔本VIC3083

出　　处：《西安交通大学学报》2021年第12期16-24,共9页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(51676146);航天低温推进剂技术国家重点实验室基金资助项目(SKLTSCP202103)。

摘　　要：为了揭示在催化剂填料的微小通道内氢正仲转化反应与流动换热耦合机理,在对比分析已有的氢正仲转化动力学模型的基础上,研究了42~70 K温度区间内氢气在催化剂填料的平直翅片通道内正仲转化反应与流动换热的耦合过程。结果表明,Elovich计算模型的平均相对误差为1.8%,是与实验数据最吻合的计算模型;由于催化剂颗粒的作用,热侧Colburn传热因子是冷侧的8~10倍,并且热侧换热增强因子与冷侧接近,正仲转化与流动换热一体化设备能够保证流动换热性能同时实现正仲连续转化过程;出口仲氢体积分数与质量空流速有关,当质量空流速小于等于0.658 kg/(m^(3)·s)时,出口仲氢体积分数能达到要求。该研究可为大型氢液化装置的系统性能优化提供理论指导。In order to reveal the mechanism of hydrogen ortho-para conversion reaction coupled with flow and heat transfer in the catalyst filled micro-channel,based on the comparative analysis of the existing kinetic models of hydrogen ortho-para conversion,the process of hydrogen ortho-para conversion coupled with flow and heat transfer in a catalyst filled plain fin channel at 42-70 K temperature is investigated.Results show that the average relative error of the Elovich calculation model is 1.8%,which is the most consistent with the experimental data.Due to the effect of catalyst particles,the Colburn heat transfer factor on the hot side is 8-10 times that on the cold side,while the thermal enhancement factor on the hot side is close to that on the cold side.Therefore,the integrated equipment of hydrogen ortho-para conversion coupled with flow and heat transfer can ensure flow and heat transfer performance and realize continuous ortho-para conversion process.The volume fraction of para-hydrogen at the outlet is related to the mass space velocity.When the mass space velocity is less than or equal to 0.658 kg/(m^(3)·s),the volume fraction of para-hydrogen at the outlet can meet the requirements.The research results provide a theoretical guidance for system performance optimization of large-scale hydrogen liquefaction units.

关 键 词：氢液化 板翅式换热器 正仲转化 流动换热 

分 类 号：TK91[动力工程及工程热物理]