连续转化式低温氢气换热器换热与催化匹配特性研究  

Investigation Into the Heat Exchange and Catalytic Matching Characteristics in Continuous Conversion Cryogenic Hydrogen gas Heat Exchangers

作　　者：魏欣宇 方松 滕钧杰 朱少龙 王凯[1,2] 邱利民 WEI Xinyu;FANG Song;TENG Junjie;ZHU Shaolong;WANG Kai;QIU Limin(Institute of Refrigeration and Cryogenics,Zhejiang University,Hangzhou 310027,China;Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Key Laboratory of Refrigeration and Cryogenic Technology,Hangzhou 310027,China)

机构地区：[1]浙江大学制冷与低温研究所,杭州310027 [2]全省制冷与低温技术重点实验室,杭州310027

出　　处：《工程热物理学报》2025年第3期703-713,共11页Journal of Engineering Thermophysics

基　　金：国家重点研发计划项目(No.2021YFB4000700)。

摘　　要：正仲氢连续催化转化是实现氢液化装置低能耗化的关键技术。正仲氢转化热具有温度相关性,且转化热随换热器沿程剧烈变化,影响氢气流动降温过程。本文针对连续转化式低温氢气板翅式换热器,通过理论分析与建立动态仿真模型研究连续转化式低温氢气换热器换热与催化匹配特性。结果显示,在不同温区具有最佳冷流体流量。以氦气为冷流体,在80-60 K范围最佳冷热质量流量比为3.5,在60-40 K范围最佳冷热质量流量比为4.7。该动态仿真揭示了氢气换热器内正仲转化与冷却流体间传热–催化匹配关系,为实际氢液化流程的设计和优化提供参考,有助于提高工艺效率、降低能源消耗,并推动氢能领域的可持续发展。In hydrogen liquefaction systems,the continuous catalytic conversion of ortho-para hy-drogen is recognized as a key technology for achieving low energy consumption.The conversion heat of ortho-para hydrogen,which exhibits temperature dependence,is observed to vary significantly along the course of the heat exchanger,influencing the cooling process of hydrogen gas flow.This study investigates continuous conversion cryogenic hydrogen plate-fin heat exchangers,employing theoretical analysis and the development of a dynamic simulation model to explore the heat ex-change and catalytic matching characteristics of such exchangers.Optimal cold fluid flow rates in various temperature zones have been determined.When helium is used as a cold fluid,optimal cold-to-hot mass flow rate ratios of 3.5 in the 80-60 K range and 4.7 in the 60-40 K range are iden-tified.The dynamic simulation elucidates the heat transfer-catalytic matching relationship between normal hydrogen conversion and the cooling fluid in hydrogen heat exchangers,offering insights for the design and optimization of hydrogen liquefaction processes.These findings contribute to enhanc-ing process efficiency,reducing energy consumption,and promoting sustainable development in the hydrogen energy sector.

关 键 词：连续转化式低温氢气换热器 正仲氢转化 传热–催化匹配 动态模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]