Two-phase flow characteristic and gas removal strategy of the paper-based microfluidic fuel cell

IF 9.9 1区 工程技术 Q1 ENERGY & FUELS
Tiancheng Ouyang , Xinru Tan , Ran Yan , Xinjing Xie , Lizhe Liang
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引用次数: 0

Abstract

Paper-based microfluidic fuel cell powered by capillary force has the advantages of compactness, low cost, and high sensitivity, presenting broad application prospects in portable electronic devices. However, the gas-liquid mass transfer mechanism within the porous medium remains unclear, with a lack of two-phase flow theories adapted to the unique paper-based system. In this study, a two-dimensional two-phase numerical model of a Y-shaped paper-based microfluidic fuel cell is developed to reveal the two-phase flow characteristics under capillary action and explore gas removal strategies. The reliability of the model is validated by real experimental data. By coupling multiple physical fields, the study elucidates the working principle and gas-liquid flow phenomena within the cell. Then, the effects of contact angle, inlet fuel concentration, and paper type on output performance, gas distribution, parasitic effect, and fuel utilization are discussed. The results indicate that increasing the contact angle and using paper with a larger average pore size and porosity as the channel substrate are ideal for promoting gas discharge. The optimal gas removal rate reached 42.30 %, with a favorable power density of 33.92 mW/cm2. This study provides a theoretical basis for a deeper understanding of the two-phase mass transfer process in paper-based microfluidic fuel cell.

Abstract Image

纸基微流体燃料电池的两相流动特性和气体去除策略
以毛细力为动力的纸基微流体燃料电池具有体积小、成本低、灵敏度高等优点,在便携式电子设备中具有广阔的应用前景。然而,多孔介质中的气液传质机理尚不清楚,缺乏适合纸基系统的两相流动理论。本研究建立了 Y 形纸基微流体燃料电池的二维两相数值模型,以揭示毛细作用下的两相流动特性,并探索气体去除策略。实际实验数据验证了模型的可靠性。研究通过耦合多个物理场,阐明了电池的工作原理和气液流动现象。然后,讨论了接触角、入口燃料浓度和纸张类型对输出性能、气体分布、寄生效应和燃料利用率的影响。结果表明,增大接触角以及使用平均孔径和孔隙率较大的纸张作为通道基质,是促进气体排放的理想选择。最佳气体去除率达到 42.30%,功率密度为 33.92 mW/cm2。这项研究为深入理解纸基微流体燃料电池中的两相传质过程提供了理论依据。
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来源期刊
Energy Conversion and Management
Energy Conversion and Management 工程技术-力学
CiteScore
19.00
自引率
11.50%
发文量
1304
审稿时长
17 days
期刊介绍: The journal Energy Conversion and Management provides a forum for publishing original contributions and comprehensive technical review articles of interdisciplinary and original research on all important energy topics. The topics considered include energy generation, utilization, conversion, storage, transmission, conservation, management and sustainability. These topics typically involve various types of energy such as mechanical, thermal, nuclear, chemical, electromagnetic, magnetic and electric. These energy types cover all known energy resources, including renewable resources (e.g., solar, bio, hydro, wind, geothermal and ocean energy), fossil fuels and nuclear resources.
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