期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 38, 期 11, 页码 4767-4775出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2013.01.187
关键词
Solid oxide fuel cell; Planar heat exchanger steam reformer; Operating characteristic; Average operating temperature
资金
- Ministry of Education, Science Technology (MEST)
- National Research Foundation of Korea (NRF) through the Human Resource Training Project for Regional Innovation
- Korea Institute of Machinery and Materials
High efficiency reforming is a key parameter of high temperature stationary fuel cell systems. In this study, a planar heat exchanger steam reformer (PHESR) was integrated with a catalytic combustor in order that the unused energy of the anode off-gas is delivered for heating and reforming. The PHESR was designed to use the anode off-gas of the externally reformed SOFC system because it has an efficiency problem. In the PHESR reactor, the heat is transferred from the catalytic burner to the reformer that has the smallest gradient of temperature difference between the two reactors. The thermal behaviors of the exothermic and endothermic reactions between the reactors were investigated experimentally. The parameters of the investigation were fuel utilization, inlet temperature, and air excess ratio. The comparison parameter was the volume fraction of hydrogen at the exit of the reforming side. The temperature gradients of two reactors were measured in the longitudinal direction. As expected, the temperature differences between the two reactors were crucial factors that required optimization. Furthermore, the geometric aspects between the finned and un-finned reactors were also investigated. The results demonstrate that the volume fraction of hydrogen at the exit is closely coupled with the geometric constraints and operating parameters. Copyright (c) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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