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Research Papers

Control-Oriented Nonlinear Modeling and Temperature Control for Solid Oxide Fuel Cell

[+] Author and Article Information
Hai-Bo Huo1

Department of Electrical Engineering, Shanghai Ocean University, Shanghai 201306, Chinahaibo761028@yahoo.com.cn

Yan-Xiang Wu, Yu-Qing Liu, Shi-Hong Gan, Xing-Hong Kuang

Department of Electrical Engineering, Shanghai Ocean University, Shanghai 201306, China

1

Corresponding author.

J. Fuel Cell Sci. Technol 7(4), 041005 (Apr 06, 2010) (9 pages) doi:10.1115/1.3211101 History: Received April 08, 2009; Revised April 10, 2009; Published April 06, 2010; Online April 06, 2010

In this paper, a variable structure controller for temperature control of the solid oxide fuel cell (SOFC) is proposed. The performance and availability of the SOFC are greatly dependent on its operating temperature. For high efficiency and low degradation of the fuel cell due to thermal cycling, the fuel cell temperature should remain fairly constant during operation. To meet the demands of developing valid control strategies, a control-oriented multi-input multi-output nonlinear thermal model of the SOFC is first developed in this paper. Then, by combining the technique of input-output linearization with variable structure control (VSC) theory, a VSC controller for temperature control is proposed. Simulation results demonstrate the correctness of the proposed control-oriented nonlinear thermal model, while the excellence of the VSC controller for temperature control in the presence of external disturbance is proved.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Structure diagram of a coflow planar SOFC stack

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Figure 2

Temperature control response of the PEN structure with a +40% step change in the current density

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Figure 3

Temperature control response of the interconnect with a +40% step change in the current density

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Figure 4

Temperature control response of the PEN structure with a −40% step change in the current density

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Figure 5

Temperature control response of the interconnect with a −40% step change in the current density

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