A comprehensive evaluation for microfluidic fuel cells from anti-vibration viewpoint using phase field theory

Tiancheng Ouyang, Jingxian Chen, Wenjun Liu, Peihang Xu, Jie Lu and Zhongkai Zhao

Renewable Energy, 2022, vol. 189, issue C, 676-693

Abstract: Microfluidic fuel cell is an underlying clean power in the future, it is regarded as a new developing direction of power source in portable electronic device with its considerable power output and cleanness, but some challenges hinder it in putting into practical application. Vibration and two-phase flow are the two non-negligible factors which have an impact on the liquid-feed microfluidic fuel cell, but the internal mechanism is not clear, a mechanism study shall be conducted to analyse the coupling effect on cell characteristic. A biphasic model, in this paper, is established with the integration of vibration effect and bubble dynamics theory. Results illustrate that the increases of vibration intensity and frequency cause the CO2 distortion, and postpone the bubble separation and elimination. The anode activation reaction site is therefore reduced, resulting in the cell performance degeneration. The increased feed liquid flow rates accelerate the bubble behavior and improve the current and power outputs, but the system efficiency is sacrificed. Increasing contact angle is a valid approach to the bubble separation and performance improvement. This study provides a theoretical understanding for the prospective optimisation design via the mechanism study and breaks a new path for novel power source investigation.

Keywords: Mechanism study; Carbon dioxide bubble; Vibration filed; Exergy efficiency (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:189:y:2022:i:c:p:676-693

DOI: 10.1016/j.renene.2022.03.067

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