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http://dx.doi.org/10.5139/JKSAS.2015.43.4.296

Performance Evaluation of Hydrogen Generation System using NaBH4 Hydrolysis for 200 W Fuel Cell Powered UAV  

Oh, Taek-Hyun (Division of Aerospace Engineering, School of Mechanical, Aerospace and Systems Engineering, KAIST)
Kwon, Sejin (Division of Aerospace Engineering, School of Mechanical, Aerospace and Systems Engineering, KAIST)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.43, no.4, 2015 , pp. 296-303 More about this Journal
Abstract
The concentration of solute in a $NaBH_4$ solution is limited due to the low solubility of $NaBO_2$. The performance of a hydrogen generation system was evaluated using various concentrations of $NaBH_4$ solution. First, a self-hydrolysis test and a hydrogen generation test for 30 min were performed. The composition of $NaBH_4$ solution was selected to be 1 wt% NaOH + 25 wt% $NaBH_4$+74wt% $H_2O$ by considering the amount of hydrogen loss, stability of hydrogen generation, $NaBO_2$ precipitation, conversion efficiency, and the purpose of its application. A hydrogen generation system for a 200 W fuel cell was evaluated for 3 h. Although hydrogen generation rate decreased with time due to $NaBO_2$ precipitation, hydrogen was produced for 3 h (conversion efficiency: 87.4%). The energy density of the 200 W fuel cell system was 263 Wh/kg. A small unmanned aerial vehicle with this fuel cell system can achieve 1.5 times longer flight time than one flying on batteries.
Keywords
Co-P/Ni Foam Catalyst; Sodium Borohydride; Hydrolysis; Hydrogen Generation System; Unmanned Aerial Vehicle;
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Times Cited By KSCI : 5  (Citation Analysis)
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