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High-efficiency fuel utilization innovation in microfluidic fuel cells: From liquid-feed to vapor-feed

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  • Ouyang, Tiancheng
  • Lu, Jie
  • Xu, Peihang
  • Hu, Xiaoyi
  • Chen, Jingxian

Abstract

Fuel cells are an efficient, environmentally friendly and renewable energy device, which is synonymous with the green age. Microfluidic fuel cells are an excellent solution to the energy needs of portable electronic devices. In the present study, both vapor- and liquid-feed modes are established, which are combined with physical fields. Moreover, the accuracy of the models is verified. According to the results, the vapor-feed microfluidic fuel cell achieves higher tolerance to low flow rates while realizing a much higher energy efficiency than the liquid-feed microfluidic fuel cell. In addition, the performance of these microfluidic fuel cells is significantly improved by increasing the electrolyte and fuel concentrations. In terms of fuel utilization, the vapor-feed mode performs much better than that of liquid-feed mode no matter what parameters are changed, which shows the superiority of vapor-feed microfluidic fuel cell. Sensitivity analysis shows that either the electrolyte or fuel concentration significantly affects the power output of these microfluidic fuel cells. Although their growth can improve the power output of the fuel cells, they have adverse effects on energy efficiency. Conclusions indicate that the vapor-feed microfluidic fuel cell is more suitable for portable electronic products, and it is worthy of further development.

Suggested Citation

  • Ouyang, Tiancheng & Lu, Jie & Xu, Peihang & Hu, Xiaoyi & Chen, Jingxian, 2022. "High-efficiency fuel utilization innovation in microfluidic fuel cells: From liquid-feed to vapor-feed," Energy, Elsevier, vol. 240(C).
    • Handle: RePEc:eee:energy:v:240:y:2022:i:c:s036054422102733x
    DOI: 10.1016/j.energy.2021.122484
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    2. Fang, Shuo & Song, Nan & Liu, Yuntao & Zhou, Chaoyang & Zhao, Chunhui & Wang, Yun, 2023. "Oscillator design for high efficiency DC-DC of micro direct methanol fuel cell," Energy, Elsevier, vol. 284(C).

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