基于氦膨胀制冷的正仲氢转化耦合流动换热研究

doi:10.11949/0438-1157.20240855

化工学报 ›› 2025, Vol. 76 ›› Issue (4): 1513-1522.DOI: 10.11949/0438-1157.20240855

基于氦膨胀制冷的正仲氢转化耦合流动换热研究

刘璐¹^,²(), 万开², 王文玥², 王太¹^,²(), 汤建成³, 王少恒⁴

^1.河北省低碳高效发电技术重点实验室，河北保定 071003
^2.华北电力大学动力工程系，河北保定 071003
^3.北京大臻科技有限公司，北京 100080
^4.河北酷德制冷科技有限公司，河北保定 071051

收稿日期:2024-07-29 修回日期:2024-10-20 出版日期:2025-04-25 发布日期:2025-05-12
通讯作者: 王太
作者简介:刘璐（1984—），女，博士，教授，luliu@ncepu.edu.cn
基金资助:
国家自然科学基金项目(51876065);中央高校基本科研业务费专项资金项目(2023MS123)

Study on orthohydrogen and parahydrogen conversion coupled flow and heat transfer based on helium expansion refrigeration

Lu LIU¹^,²(), Kai WAN², Wenyue WANG², Tai WANG¹^,²(), Jiancheng TANG³, Shaoheng WANG⁴

^1.Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, Baoding 071003, Hebei, China
^2.Department of Power Engineering, North China Electric Power University, Baoding 071003, Hebei, China
^3.Beijing Dazhen Technology Co. , Ltd. , Beijing 100080, China
^4.Hebei Kude Refrigeration Technology Co. , Ltd. , Baoding 071051, Hebei, China

Received:2024-07-29 Revised:2024-10-20 Online:2025-04-25 Published:2025-05-12
Contact: Tai WANG

摘要/Abstract

摘要：

为探寻基于氦膨胀制冷的氢液化流程中正仲氢转化耦合流动换热特性，采用CFD数值模拟方法，以四股流板翅式换热器为研究对象，研究了氢气在填料微通道内的正仲转化反应和流动换热性能，分析了催化剂粒径和孔隙率，氢气入口Re，低压氦气与氢气质量流量比m_r对流动换热性能及出口仲氢体积分数的影响。研究结果表明：孔隙率由0.3增大为0.7，换热增强因子TEF最大可以提升71.59%；粒径由390 μm增大至790 μm，TEF最大可以提升37.05%；选用较大孔隙率和催化剂粒径更有利于提升氢通道综合换热性能。氢气入口Re由1500减小为500，TEF最多可以提升147.96%，低Re运行工况的通道换热性能更优。当低压氦气与氢气质量流量比值m_r为6时，氢气在翅片通道内正仲转化耦合流动传热性能达到最优。研究结果可为大型氦膨胀制冷的氢液化系统提供理论指导。

关键词: 氢液化, 正仲氢转化, 流动传热, 催化剂, 数值模拟

Abstract:

In order to explore the coupled flow and heat transfer characteristics with orthohydrogen and parahydrogen conversion in the hydrogen liquefaction process based on helium expansion refrigeration, the orthohydrogen and parahydrogen conversion reaction with flow and heat transfer performance of hydrogen gas in a four-flow plate-fin heat exchanger were studied by using CFD numerical simulation method. The effects of catalyst particle size and porosity, hydrogen inlet Re, low-pressure helium to hydrogen mass flow ratio (m_r) on flow and heat transfer performance and outlet volume fraction of para-hydrogen were analyzed. The research results show that: when the porosity increases from 0.3 to 0.7, the heat transfer enhancement factor TEF can be increased by 71.59% at most; the particle size increases from 390 μm to 790 μm, and the TEF can be increased by a maximum of 37.05%; the use of larger porosity and catalyst particle size is more conducive to improving the comprehensive heat transfer performance of the hydrogen channel. When the hydrogen inlet Re decreases from 1500 to 500, the TEF can be increased by up to 147.96%. The channel heat transfer performance is better under low Re operating conditions. When the mass flow ratio of low-pressure helium gas to hydrogen gas m_r = 6, the heat transfer performance of hydrogen gas in the finned channel reaches its optimal state through the coupling of orthohydrogen and parahydrogen conversion with flow and heat transfer. The research results of this article can provide theoretical guidance for the hydrogen liquefaction system of large-scale helium expansion refrigeration.

Key words: hydrogen liquefaction, orthohydrogen and parahydrogen conversion, flow and heat transfer, catalyst, numerical simulation

中图分类号:

TQ 116.2

刘璐, 万开, 王文玥, 王太, 汤建成, 王少恒. 基于氦膨胀制冷的正仲氢转化耦合流动换热研究[J]. 化工学报, 2025, 76(4): 1513-1522.

Lu LIU, Kai WAN, Wenyue WANG, Tai WANG, Jiancheng TANG, Shaoheng WANG. Study on orthohydrogen and parahydrogen conversion coupled flow and heat transfer based on helium expansion refrigeration[J]. CIESC Journal, 2025, 76(4): 1513-1522.

图/表 16

图1 四股流板翅式换热器模型示意图

Fig.1 Schematic diagram of four-flow plate-fin heat exchanger model

表1 催化层的结构和性能参数

Table 1 Structure and performance parameters of Fe2O3

催化剂

孔隙率ε

颗粒直径d_p/μm

密度ρ/

(kg/m³)

比热容c_p /

(J/(kg∙K))

热导率λ_s/

(W/(m∙K))

Fe₂O₃

图2 四股流板翅式换热器计算模型示意图

Fig.2 Schematic diagram of the calculation model of four-flow plate-fin heat exchanger

图3 区域离散化结果

Fig.3 Results of region discretization

图4 网格无关性验证

Fig.4 Grid independence verification

表2 结果比较

Table 2 Comparsion of results

条件	温度/K		温度的相对误差/%
条件	文献^[31]	数值模拟	温度的相对误差/%
He-0.21 MPa	214.12	16.06	0.91
He-0.70 MPa	214.09	214.67	0.27

图5 模拟结果与文献结果对比

Fig.5 Comparison between simulation results and literature results

图6 出口仲氢体积分数计算值与实验结果对比

Fig.6 Comparison between the calculated results and experimental data of volume fraction of parahydrogen at outlet

图7 不同位置的温度分布云图

Fig.7 Cloud map of temperature distribution at different locations

图8 通道中心工质温度沿轴向长度的变化

Fig.8 Variation of working fluid temperature along the axial length at the center of the channel

图9 氢气的比热容（1.8 MPa）

Fig.9 The specific heat capacity of hydrogen (1.8 MPa)

图10 仲氢体积分数沿轴向长度变化

Fig.10 The variation of volume fraction of parahydrogen along the axial length

图11 流动换热性能随催化剂颗粒粒径和孔隙率的变化

Fig.11 Changes in flow and heat transfer performance with catalyst particle size and porosity

图12 出口仲氢体积分数随催化剂颗粒粒径和孔隙率的变化

Fig.12 Variation of volume fraction of parahydrogen at outlet with catalyst particle size and porosity

图13 流动换热性能随Re和低压氦气与氢气质量流量比mr的变化

Fig.13 Variation of flow and heat transfer performance with Re and mass flow ratio of low pressure helium to hydrogen mr

图14 出口仲氢体积分数随Re和低压氦气与氢气质量流量比mr的变化

Fig.14 Variation of volume fraction of parahydrogen at outlet with Re and mass flow ratio of low pressure helium to hydrogen mr

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基于氦膨胀制冷的正仲氢转化耦合流动换热研究

Study on orthohydrogen and parahydrogen conversion coupled flow and heat transfer based on helium expansion refrigeration

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