Response of a planar solid oxide fuel cell to step load and inlet flow temperature changes |
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Authors: | Pejman Kazempoor Fathollah OmmiViktor Dorer |
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Affiliation: | a Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran b Empa, Swiss Federal Laboratories for Materials Science and Technology, Building Science and Technology Laboratory, CH-8600 Dübendorf, Switzerland |
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Abstract: | To explore the dynamic characteristics of the SOFC systems and to develop relevant control strategies, a previously developed steady state SOFC model is converted to a dynamic model. The model includes mass, momentum, thermal and electrochemical analysis, as well as the kinetic model of hydrocarbon reactions. Applying two control strategies i.e., cell constant fuel flow rate and constant fuel utilization during the transient time, the model is implemented to analyse the dynamic behaviour of a planar direct internal reforming (DIR) SOFC cell under several step-load changes. Transient response, resulting from an inlet temperature variation, is also investigated. The results show that the relaxation time is strongly related to the thermal behaviour of the cell and the applied control strategy. However, it is almost independent of the load variation magnitude. |
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Keywords: | Solid oxide fuel cell Planar cell geometry Step load change Dynamic behaviour Mathematical simulation |
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