Kim, Jincheol Kim, Dong-Min Kim, Sung-Yug Nam, Suk Woo Kim, Taegyu 2024-01-20T09:34:56Z 2024-01-20T09:34:56Z 2021-09-04 2014-05-15 0360-3199 https://pubs.kist.re.kr/handle/201004/126788 In the present study, a short circuit controller for use in the humidification of polymer electrolyte membrane fuel cells was developed for unmanned aerial vehicles (UAVs). Fuel cells (FCs) require an external humidifier to avoid drying up. Particularly in UAV applications, humidity control is more important because the boiling point of water decreases with increase in flight altitude. In this study, overcurrent was generated by short-circuiting an FC to humidify the electrolyte membrane and improve the electric power output. An FC controller incorporating a short circuit unit was developed, and a battery was hybridized with the PC to compensate the power when the latter was short-circuited. The performance of the FC was evaluated for the interval (period) and duration of short circuit. Using this method, the power output was improved by 16% when short circuit control was operated at the optimal condition. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD DESIGN Humidification of polymer electrolyte membrane fuel cell using short circuit control for unmanned aerial vehicle applications Article 10.1016/j.ijhydene.2014.03.012 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.39, no.15, pp.7925 - 7930 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 39 15 7925 7930 scie scopus 000336338500035 2-s2.0-84899898559 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article DESIGN Short circuit Humidification Polymer electrolyte membrane fuel cell