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TECHNICAL PAPERS

Dynamic Model of 5kW SOFC CHP Test Station

[+] Author and Article Information
Jaakko Saarinen, Matias Halinen, Jukka Ylijoki, Matti Noponen, Pekka Simell, Jari Kiviaho

 VTT Technical Research Centre of Finland, Biologinkuja 3-5, P.O. Box 1000, FIN-02044 VTT, Finland

J. Fuel Cell Sci. Technol 4(4), 397-405 (Jun 22, 2006) (9 pages) doi:10.1115/1.2759502 History: Received November 30, 2005; Revised June 22, 2006

A dynamical model for a 5kW class solid oxide fuel cell (SOFC) combined heat and power (CHP) test station has been composed using the APROS® environment. The model is based on a real test station being constructed and operated at VTT Technical Research Centre of Finland and it comprises the following main components of the real test system: the autothermal reforming unit, SOFC stack situated inside a furnace, catalytic afterburner, and three heat exchangers. The constructed model has been verified against experimental results obtained from the autothermal reforming unit, catalytic afterburner, and the two cathode side heat exchangers. The model has been used for the phenomenological studies of the system during current transient simulations using a simplified and fast zero-dimensional model including internal reforming reactions for the SOFC stack. The test station model was capable of operating at a speed of 18 times the real time using a standard personal computer.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic layout of the SOFC CHP test station

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Figure 3

ATR outlet molar fractions in Case 2

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Figure 4

ATR outlet molar fractions in Case 3

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Figure 5

Modeled molar fractions at the different catalysts of the catalytic afterburner

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Figure 6

Simulated stack current-voltage and current-power curve

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Figure 7

Stack voltage, average SOFC-gas temperature, and average stack temperature during a current transient simulation

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Figure 8

System temperatures during a current transient simulation

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Figure 2

ATR outlet molar fractions in Case 1

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