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Title: Low-power fuel delivery with concentration regulation for micro direct methanol fuel cell
Authors: Yang, Y.
Liang, Y.C. 
Yao, K.
Ong, C.K.
Keywords: Bubble actuation
direct methanol fuel cells
fuel concentration regulation
micro fuel cell
surface-tension driving
Issue Date: May-2011
Citation: Yang, Y., Liang, Y.C., Yao, K., Ong, C.K. (2011-05). Low-power fuel delivery with concentration regulation for micro direct methanol fuel cell. IEEE Transactions on Industry Applications 47 (3) : 1470-1479. ScholarBank@NUS Repository.
Abstract: Over the past decade, the direct methanol fuel cell (DMFC) has been considered as a potential candidate of power sources for portable electronics due to its high energy density and environmental friendly operation. However, the use of diluted fuel loading and active fuel mixer/pump limits the DMFC's efficiency and operating time dramatically. The disadvantages become more severe in microscale DMFCs which require high conversion efficiency within a small physical space to meet the strict working specifications. In this paper, a low-power micro fuel supplier with programmable concentration regulation was designed and fabricated by using microelectromechanical system technology. The prototype adopted surface-tension pumping as the primary driving force to deliver fuel at zero power consumption. In addition, a well-arranged microfluidic capillary network was used to regulate the fuel concentration. A pulse-power actuated bubbler switch was embedded in the capillary network to achieve the liquid flow control dynamically and to adjust the fuel concentration for micro-DMFC (μDMFC) reaction. Both electrolysis and thermal bubble actuations were investigated in this paper for their effective operations in the prototype. The advantage of precise and low-power fuel regulation within a compact system volume makes the proposed fuel delivery subsystem a suitable candidate for future on-chip μDMFC development. © 2011 IEEE.
Source Title: IEEE Transactions on Industry Applications
ISSN: 00939994
DOI: 10.1109/TIA.2011.2126012
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