Research on Three Methods for Calculating Heat Release from Ortho-Para Catalytic Conversion in Cryogenic Hydrogen Storage Systems

Yue Tenglong; Xu Jingxuan

doi:10.12465/j.issn.0253-4339.2025.05.047

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Research on Three Methods for Calculating Heat Release from Ortho-Para Catalytic Conversion in Cryogenic Hydrogen Storage Systems

Hydrogen Liquefaction & Cryogenic Storage and Transmission | 更新时间：2025-09-29

- Research on Three Methods for Calculating Heat Release from Ortho-Para Catalytic Conversion in Cryogenic Hydrogen Storage Systems
- Journal of Refrigeration Vol. 46, Issue 5, Pages: 47-57(2025)
- 作者机构：
  
  上海理工大学储能科学与工程研究所　上海　200093
- 作者简介：
  
  Xu Jingxuan, female, associate professor, School of Energy and Power Engineering, University of Shanghai for Science and Technology, 86-18217105157, E-mail: xujingxuan@usst.edu.cn. Research fields: cryogenic hydrogen energy storage and transportation, cryogenic energy storage technology.
- 基金信息：
- DOI：10.12465/j.issn.0253-4339.2025.05.047
  CLC： TQ116.2;TK91
- Received：19 April 2025，
  
  Revised：2025-04-28，
  
  Accepted：07 May 2025，
  
  Published：16 October 2025
- 稿件说明：
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Yue Tenglong, Xu Jingxuan. Research on Three Methods for Calculating Heat Release from Ortho-Para Catalytic Conversion in Cryogenic Hydrogen Storage Systems[J]. Journal of refrigeration, 2025, 46(5): 47-57.
DOI：

Yue Tenglong, Xu Jingxuan. Research on Three Methods for Calculating Heat Release from Ortho-Para Catalytic Conversion in Cryogenic Hydrogen Storage Systems[J]. Journal of refrigeration, 2025, 46(5): 47-57. DOI： 10.12465/j.issn.0253-4339.2025.05.047.

摘要

低温储氢系统中，不同正-仲氢催化转化放热量的精确计算方法对储氢系统负荷的确定至关重要。通过建立相应的转化模型，分别应用平滑样条曲线拟合实验数据和能量衡算的方法，推导了绝热转化多级转化器放热量的计算方法以及连续转化的转化热表达式，并分析了绝热、等温及连续转化方式的放热特性，结果表明连续转化的转化热最小，等温转化最大，而绝热转化介于两者之间，且与转化级数相关。针对连续转化的隐式微分表达式提出一种编程求解的具体方法和步骤。2种方法的计算结果一致，最大偏差仅为0.22%，表明提出的计算方法是有效和准确的。

Abstract

In cryogenic hydrogen storage systems

an accurate calculation method for the heat release from different ortho-para hydrogen catalytic conversions is important to determine the load of hydrogen storage systems. The objective of this study is to present a precise calculation method for the conversion heat of ortho-para hydrogen. By establishing a conversion model

the methods of using a smoothing spline curve to fit the experimental data and energy balance calculations are used to derive the released heat in adiabatic conversion multistage converters and the released heat during continuous conversion. The heat release properties of different conversion methods are analyzed in this study. Notably

the heat release amount of continuous conversion is the smallest

that of isothermal conversion is the largest

and the conversion heat of adiabatic conversion is in between

which is related to the number of conversion stages. In addition

a specific method and procedure are programmed to solve the implicit differential formula for continuous conversion. Finally

the calculation results of the different methods are consistent with a maximum deviation of only 0.22%

indicating that the calculations in this study are valid and accurate.

关键词

Keywords

references

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