A study on thermal and flow characteristics of liquefied hydrogen heat exchanger for train using computational analysis

被引：0
作者：
Ryu, Myeong-rok [1 ]
Kang, Daehoon [1 ]
Kim, Bo-kyong [1 ]
Kim, Jaewon [1 ]
Kim, Gildong [1 ]
Yun, Sungho [2 ]
机构：
[1] Korea Railroad Res Inst, Smart Elect & Signaling Div, Uiwang 16105, South Korea
[2] Korea Railroad Res Inst, Railroad Safety Div, Uiwang 16105, South Korea
来源：
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2024年
关键词：
Liquified hydrogen; Heat exchanger; Ethylene glycol water; Freezing possibility; VAPORIZER;
D O I：
10.1007/s12206-024-0920-4
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Liquefied hydrogen has a high energy density, so it is suitable for railways that require a lot of energy and use fuel for a long time. In this paper, the effects of changes in hydrogen inlet flow rate, outlet pressure conditions, and ethylene glycol water (EGW) flow rate in liquefied hydrogen heat exchangers for locomotives on hydrogen outlet temperature, EGW outlet temperature, hydrogen pressure-drop, hydrogen outlet density, hydrogen outlet flow velocity, and EGW freezing possible range were analyzed through computational analysis. Increasing the inlet flow rate of EGW increased the outlet temperature of EGW and hydrogen, and showed a greater effect in reducing the freezing possible range than increasing the outlet temperature of hydrogen. Increasing the hydrogen outlet pressure increased the hydrogen and EGW outlet temperature and had a greater effect on the increase in the hydrogen outlet temperature than the decrease in the freezing possible range.
引用
收藏
页码：5467 / 5477
页数：11
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