Cooling capacity characteristics of a simplified JT cryocooler working at liquid hydrogen temperature

IF 6.9 2区工程技术 Q2 ENERGY & FUELS

Applied Thermal Engineering Pub Date : 2025-10-02 DOI:10.1016/j.applthermaleng.2025.128612

Yunwei Shen , Ziyun Luo , Changxu Qiu , Zhichao Chen , Shaoshuai Liu , Qinyu Zhao , Bo Wang , Zhihua Gan

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Abstract

Characterized by high reliability, low-level vibration and no moving parts in the cold end, the precooled Joule-Thomson (JT) cryocooler working at liquid hydrogen temperature has potential applications in cooling electronic devices and liquid hydrogen zero boil-off systems in space. In order to reduce complexity, a simplified JT cryocooler has been proposed, successfully achieving liquid hydrogen refrigeration. However, its cooling capacity characteristics have not been systematically studied yet. Consequently, in this study, steady working states of the simplified JT cryocooler at different precooling temperatures are analyzed based on thermodynamic analysis. At a fixed precooling temperature, the temperature behaviors of this JT cryocooler under various heat loads are explained. The inlet temperature of the precooling heat exchanger demonstrates distinct variations under different heat load conditions. The effects of the heat load and the precooling temperature on cooling capacity characteristics are verified with experimental results.

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液氢温度下简化JT制冷机制冷量特性研究

在液氢温度下工作的预冷式焦耳-汤姆逊（JT）制冷机具有可靠性高、振动小、冷端无运动部件等特点，在电子器件冷却和空间液氢零蒸发系统中具有潜在的应用前景。为了降低复杂性，提出了一种简化的JT制冷机，成功地实现了液氢制冷。但其制冷量特性尚未得到系统的研究。因此，本研究基于热力学分析，对简化JT制冷机在不同预冷温度下的稳定工作状态进行了分析。在固定的预冷温度下，解释了该JT制冷机在不同热负荷下的温度行为。预冷换热器的入口温度在不同热负荷条件下表现出明显的变化。实验结果验证了热负荷和预冷温度对制冷量特性的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.