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Research Papers

# Simulation Study for the Series Connected Bundles of Microtubular SOFCs

[+] Author and Article Information
Yoshihiro Funahashi

Fine Ceramics Research Association, 2266-99 Anagahora, Shimo-shidami, Moriyama-ku, Nagoya 463-8561, Japan; NGK Spark Plug Co., Ltd., 2808 Iwasaki Komaki 485-8510, Japany-funahashi@aist.go.jp

Toru Shimamori

NGK Spark Plug Co., Ltd., 2808 Iwasaki Komaki 485-8510, Japan

Toshio Suzuki, Yoshinobu Fujishiro, Masanobu Awano

National Institute of Advanced Industrial Science and Technology (AIST), 2266–98 Anagahora Shimo-shidami Moriyama-ku Nagoya 463–8560, Japan

Takuto Araki

Yokohama National University, 79–5 Tokiwadai Hodogaya-ku Yokohama 240–8501, Japan

J. Fuel Cell Sci. Technol 7(5), 051012 (Jul 19, 2010) (5 pages) doi:10.1115/1.4001022 History: Received October 17, 2009; Revised November 09, 2009; Published July 19, 2010; Online July 19, 2010

## Abstract

Solid oxide fuel cells (SOFCs) have the highest energy conversion efficiency among various power generators and expected to be earlier commercialization. Our study aims to develop fabrication techniques of microtubular SOFC bundles and establish realistic bundle structure for kilowatt class module. So far, we have succeeded to establish fabrication technology of the microtubular SOFC bundles using porous supporting matrices. In this study, the simulation study of the microtubular SOFC bundle was carried out to understand Joule heat and temperature distribution in the microtubular SOFC bundle during operation. The results indicated that the method of current collection had to be carefully considered, since the total output power loss of the bundle was estimated to be 27.8%. The temperature distribution of the bundle using porous MgO matrices turned out to be moderate compared with that in the previous bundle using porous $(La,Sr)(Co,Fe)O3$ matrices due to the difference in the thermal conductivity of each matrix constitute.

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Copyright © 2010 by American Society of Mechanical Engineers
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## Figures

Figure 1

Conceptual image of the series connected bundle

Figure 2

Appearance of series connected bundle

Figure 3

The model of the series connected bundle consisting of micro tubular cells and porous matrices

Figure 4

The distribution of (a) voltage loss and (b) current density on the surface of micro tubular cells (electrolyte)

Figure 5

Joule heat distribution for each constituent of the series connected bundle

Figure 6

Joule heat distribution on the surface of the current collector

Figure 7

Temperature distribution of the series connected bundle

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