Sensor-less control of methanol concentration based on estimation of methanol consumption rates for direct methanol fuel cell systems
- Authors
- Ha, Tae Jung; Kim, Jong-Ho; Joh, Han-Ik; Kim, Soo-Kil; Moon, Go-Young; Lim, Tae-Hoon; Han, Chonghun; Ha, Heung Yong
- Issue Date
- Dec-2008
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Direct methanol fuel cell (DMFC); Fuel circulation loop; Sensor-less methanol concentration control; Methanol consumption rate; Methanol crossover
- Citation
- INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.33, no.23, pp 7163 - 7171
- Pages
- 9
- Journal Title
- INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
- Volume
- 33
- Number
- 23
- Start Page
- 7163
- End Page
- 7171
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/42460
- DOI
- 10.1016/j.ijhydene.2008.09.019
- ISSN
- 0360-3199
1879-3487
- Abstract
- Adequate control over the concentration of methanol is critically needed in operating direct methanol fuel cell (DMFC) systems, because performance and energy efficiency of the systems are primarily dependent on the concentration of methanol feed. For this purpose, we have built a sensor-less control logic that can operate based on the estimation of the rates of methanol consumption in a DMFC. The rates of methanol consumption are measured in a cell and the resulting data are fed as an input to the control program to calculate the amount of methanol required to maintain the concentration of methanol at a set value under the given operating conditions of a cell. The sensor-less control has been applied to a DMFC system employed with a large-size single cell and the concentration of methanol is found to be controlled stably to target concentrations even though there are some deviations from the target values. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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