具有非等距深度3D流场的PEMFC的性能分析
Mingge Wu1,2, Mengbin Gao1,2, Zhanqi Mao1,2
1College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, Zhejiang Province 325000, China.
ACS omega
|February 23, 2026
概括
这项研究为质子交换膜燃料电池 (PEMFC) 引入了一种新的3D流场,改善了反应剂的分布并减少了损失. 优化的设计显著提高了功率密度,同时保持了有效的水资源管理.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 机械工程 机械工程
背景情况:
- 质子交换膜燃料电池 (PEMFC) 对清洁能源至关重要,但在高电流密度下,质量传输损失限制了性能.
- 现有的流场设计往往侧重于2D结构,在3D无等距离深度设计中留下了优化潜力.
研究的目的:
- 为PEMFCs引入和分析一种新的无液态距离深度3D流场.
- 为了研究通道倾斜和梯形块高度对燃料电池性能的影响.
- 通过优化流场几何学来增强质量传输和功率密度.
主要方法:
- 使用快速激光切除技术制造金属双极板.
- 数字模拟用于分析气体流动力学,反应剂分布和性能指标.
- 参数研究不同道倾斜度和梯形块高度.
主要成果:
- 确定了一个最优的设计,道倾斜高度为0.3毫米,梯形块高度为0.3毫米.
- 拟议的3D流场在通道-气体扩散层 (GDL) 接口上显著增加了流速.
- 在GDL-催化剂层 (CL) 接口上观察到增强和均的反应剂度.
- 最大功率密度增加了39.48%,达到1.551W/cm2.
- 水资源管理是有效的,只有10.79%的水含量增加.
结论:
- 新的无等距离深度3D流场设计有效地减轻了PEMFC中的质量运输损失.
- 优化的几何参数 (0.3毫米倾斜和块高度) 产生优越的燃料电池性能.
- 这种设计为通过改进的流场工程来推进PEMFC技术提供了一个有希望的途径.
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