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Title: Application of valve-less impedance pumps to a direct sodium borohydride-hydrogen peroxide fuel cell
Authors: Wen, CY 
Yang, AS
Tseng, JW
Keywords: Direct Sodium Borohydride-Hydrogen Peroxide Fuel Cell (DBHPFC)
Impedance pump
Issue Date: 2014
Publisher: American Society of Mechanical Engineers (ASME)
Source: American society of mechanical engineers, Fluids Engineering Division (Publication) FEDSM, 2014, v. 1C How to cite?
Abstract: In this study, two novel valve-less impedance pumps are applied, for the first time, in the liquid fuel supply of a Direct Sodium Borohydride-Hydrogen Peroxide Fuel Cell (DBHPFC). This valve-less pump prevents the pump corrosion and serves appropriately to reduce the volume and weight of fuel cell systems. It comprises an amber latex rubber tube, connected at both ends to rigid stainless steel tubes of different acoustic impedance, and a simple actuation mechanism which combines a small DC motor and a cam. The motor activated cam periodically compresses the elastic tube at a position asymmetric from the tube ends. Traveling waves, emitted from the compression, combine with reflected waves at the impedance-mismatched rubber tube/stainless tube interfaces. The resulting wave interference creates a pressure gradient and generates a net flow. A DBHPFC with the active area of 25 cm2 is constructed. It is shown that the maximum pumping rate can achieve 30 ml/min with the DBHPFC connected. The corresponding maximum power and current are 13.0 W and 25.5 A, respectively. Specific power, volumetric power density, and back work ratio of the DBHPFC using this pumping method are shown superior to those of the other pumping configuration with the peristaltic pumps.
Description: ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014, Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels, Chicago, 3-7 August 2014
ISBN: 978-0-7918-4623-0
ISSN: 0888-8116
DOI: 10.1115/FEDSM2014-21836
Appears in Collections:Conference Paper

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