波纹形流道质子交换膜燃料电池热质传输性能研究

Study on Heat and Mass Transfer Performance of Proton Exchange Mem-brane Fuel Cell with Corrugated Flow Channel

中文关键词: 质子交换膜燃料电池  波纹形流道  三维两相模型  传热传质

英文关键词: proton exchange membrane fuel cell  corrugated flow channel  three-dimensional two-phase model  heat and mass transfer

中文摘要:

      流道结构对质子交换膜燃料电池（PEMFC）的热质传输性能具有重要影响。针对传统平行流道在传热传质和水管理方面的不足，提出了一种波纹形流道结构，以改善物质分布均匀性并优化水热管理性能。通过建立三维两相PEMFC模型，对不同波形函数参数的波纹形流道结构进行了数值研究。研究结果表明，波纹形流道结构在气体流速、气体分布、温度分布以及液态水去除等方面均优于传统平行流道结构，从而显著提升了燃料电池的整体性能，最大功率密度提高了约14.53%。进一步分析了波形函数的振幅、周期及两波形函数间相位差对燃料电池性能的影响，发现较大的振幅和较小的周期能够显著改善输出性能，而相位差为半个周期的波纹形结构相比相位差为一个周期的传统波纹形结构表现出更优异的性能。

英文摘要:

      The flow channel structure has a significant impact on the heat and mass transfer performance of Proton Exchange Membrane Fuel Cells (PEMFCs). This paper proposed a corrugated flow channel structure is proposed to address the shortcomings of conventional parallel channels in heat, mass transfer and water management, in order to improve material distribution uniformity and optimize hydrothermal management performance. This paper conducted a nu-merical study on the corrugated flow channel structure with different waveform function parameters by establishing a three-dimensional, two-phase PEMFC model. The research results indicate that the corrugated flow channel structure is superior to the traditional parallel channel structure in terms of gas flow velocity, gas distribution, temperature dis-tribution, and liquid water removal, thereby significantly improving the overall performance of the fuel cell, with a maximum power density increase of approximately 14.53%. Further analysis on the impact of the amplitude, period of the waveform function, and the phase difference between two waveform functions on the performance of fuel cells. The results indicate that larger amplitudes and smaller periods can significantly improve output performance, while the corrugated structure with a phase different of half a period showed better performance compared to the tra-ditional corrugated structure with a phase difference of one period.