关于工作环境对燃料电池绝缘的影响的研究
Ji Pu1,2, Qianya Xie2, Kang Li2
1Wuhan University of Technology, Automotive Engineering College, Wuhan, 430070, China.
Heliyon
|February 17, 2025
概括
高环境相对湿度显著降低了质子交换膜 (PEM) 燃料电池绝缘. 保持湿度低于60%和优化组件设计对于确保商用车燃料电池发动机性能和安全至关重要.
科学领域:
- 工程 工程师 工程师 工程师
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 燃料电池发动机提供清洁和高效的能量转换.
- 有效的绝缘对于燃料电池发动机的性能和安全至关重要.
- 以前的研究集中在冷却剂特性和离子沉,但环境湿度的影响不太清楚.
研究的目的:
- 分析环境相对湿度 (RH) 对多层质子交换膜 (PEM) 燃料电池的绝缘的影响.
- 为改善商用车辆应用中的燃料电池绝缘提供见解.
主要方法:
- 实验测试和流体模拟的组合.
- 在商用车辆中使用的多堆PEM燃料电池的分析.
- 在不同的环境RH条件下对绝缘电阻 (IR) 的研究.
主要成果:
- 燃料电池堆的绝缘电阻 (IR) 随着环境RH增加而突然降低.
- 当环境RH低于60%时,观察到最佳的绝缘性能.
- 增加的冷却水温度和导电性对堆绝缘产生了负面影响,导电性具有更显著的影响.
结论:
- 环境RH是影响燃料电池堆绝缘的关键因素.
- 设计修改,例如清洗外管道直径 (约. 主管的20%) 和堆间的间隙 (≥15毫米),可以减轻湿度问题.
- 了解高RH下的爬行距离和介电强度对于开发商业燃料电池应用的更好的绝缘策略至关重要.
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