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http://dx.doi.org/10.3795/KSME-B.2016.40.12.793

Geometric Characteristics of Methane Steam Reforming with Low Temperature Heat Source  

Shin, Gahui (Graduate school, Chungnam Nat'l Univ.)
Yun, Jinwon (Graduate school, Chungnam Nat'l Univ.)
Yu, Sangseok (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.40, no.12, 2016 , pp. 793-799 More about this Journal
Abstract
In a hybrid fuel cell system, low-temperature reforming technology, which uses waste heat as a heat source, is applied to improve system efficiency. A low temperature reformer is required to optimize geometry in low thermal conditions so that the reformer can achieve the proper methane conversion rate. This study analyzed internal temperature distributions and the reaction patterns of a reformer by considering the change of the shape factor on the limited heat supply condition. Unlike the case of a high temperature reformer, analysis showed that the reaction of a low temperature reformer takes place primarily in the high temperature region of the reactor exit. In addition, it was confirmed that the efficiency can be improved by reducing the GHSV (gas hourly space velocity) or increasing the heat transfer area in the radial direction. Through reacting characteristic analysis, according to change of the aspect ratio, it was confirmed that a low temperature reformer can improve the efficiency by increasing the heat transfer in the radial direction, rather than in the longitudinal direction.
Keywords
Heat Transfer; Numerical Simulation; Steam Reformer; Hydrogen; Low Temperature Heat Source;
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Times Cited By KSCI : 1  (Citation Analysis)
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