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SOFC System Modelling in the Hybrid Power Plant Project

Leucht, Florian and Friedrich, K. Andreas (2009) SOFC System Modelling in the Hybrid Power Plant Project. In: 6th Symposium on Fuel Cell Modelling and Experimental Validation. 6th Symposium on Fuel Cell Modelling and Experimental Validation, 2009-03-25 - 2009-03-26, Bad Herrenalb, Germany.

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Abstract

Hybrid power plants offer a promising way to deliver electricity at very high efficiencies. The aim of the DLR project Hybrid Power Plant is to push this technology towards a pre-commercial state. Therefore a dynamic model is being developed which will enable us to gain a deep insight into the power plant without risking hardware. A stationary model has been developed to perform system efficiency analysis as described in [1]. To fully understand the processes in the fuel cell system detailed modelling is crucial. The models generated will be used for control design and a model based control of a gas turbine system installed on site in Stuttgart, therefore they have to be able to run in real time. It is noted that detailed modelling and real time modelling are incompatible as commonly experience in modelling activities. The presentation will focus on stack modelling performed in 2008. The detailed model is based on a conventional Nernst and Tafel approach [2]. The stack is modelled from single cell models each used as a representative for a bundle in the system. In order to reduce model complexity and to speed up calculation time electrochemistry was integrated into the model as a four dimensional look up table [3], which was derived from the single cell model. Pressure influence on cell performance will be discussed based on modelling results from a short element of a tubular cell. The pressure dependence of two modes of operation with distinct behaviours is presented. Validation of the stack model was performed on a Siemens SFC 5 Alpha system installed in Stuttgart. Several load steps as well as voltage current curves obtained during operation where used for model validation. The model is in good agreement with the experimental results. A further focus will be on system modelling demonstrating the dynamic behaviour of the coupled components.

Item URL in elib:https://elib.dlr.de/58529/
Document Type:Conference or Workshop Item (Speech)
Title:SOFC System Modelling in the Hybrid Power Plant Project
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Leucht, FlorianUNSPECIFIEDUNSPECIFIED
Friedrich, K. AndreasUNSPECIFIEDUNSPECIFIED
Date:30 March 2009
Journal or Publication Title:6th Symposium on Fuel Cell Modelling and Experimental Validation
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
Bessler, WolfgangUNSPECIFIED
Deutschmann, OlafUNSPECIFIED
Status:Published
Keywords:SOFC, Fuel Cell, Hybrid Power Plant, Systems, Pressurized Hybrid
Event Title:6th Symposium on Fuel Cell Modelling and Experimental Validation
Event Location:Bad Herrenalb, Germany
Event Type:international Conference
Event Dates:2009-03-25 - 2009-03-26
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E VG - Combustion and Gas Turbine Technologies (old), E EV - Energy process technology (old), E BZ - Fuel cells (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies, E EV - Energy process technology, E BZ - Fuel cells
DLR - Research theme (Project):E - Hybridkraftwerke (old), E - Elektrochemische Prozesse (old), E - Hochtemperatur-Brennstoffzellen (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Leucht, Florian
Deposited On:06 Oct 2009 13:54
Last Modified:12 Dec 2013 20:37

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