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A direct methanol fuel cell system to power a humanoid robot |
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| Authors: | Han-Ik Joh Tae Jung Ha Sang Youp Hwang Jong-Ho Kim Seung-Hoon Chae Jae Hyung Cho Joghee Prabhuram Soo-Kil Kim Tae-Hoon Lim Baek-Kyu Cho Jun-Ho Oh Sang Heup Moon Heung Yong Ha |
| Affiliation: | a Center for Fuel Cell Research, Korea Institute of Science and Technology (KIST), P.O. Box 131, Cheongyang, Seoul 130-650, Republic of Korea b School of Chemical &; Biological Engineering and Institute of Chemical Processes, Seoul National University, San 56-1, Shillim-dong, Kwanak-ku, Seoul 151-744, Republic of Korea c HUBO Laboratory, Humanoid Robot Research Center, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea |
| Abstract: | In this study, a direct methanol fuel cell (DMFC) system, which is the first of its kind, has been developed to power a humanoid robot. The DMFC system consists of a stack, a balance of plant (BOP), a power management unit (PMU), and a back-up battery. The stack has 42 unit cells and is able to produce about 400 W at 19.3 V. The robot is 125 cm tall, weighs 56 kg, and consumes 210 W during normal operation. The robot is integrated with the DMFC system that powers the robot in a stable manner for more than 2 h. The power consumption by the robot during various motions is studied, and load sharing between the fuel cell and the back-up battery is also observed. The loss of methanol feed due to crossover and evaporation amounts to 32.0% and the efficiency of the DMFC system in terms of net electric power is 22.0%. |
| Keywords: | Direct methanol fuel cell Load sharing ratio Efficiency Fuel cell/battery hybrid system Robot |
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