Transient Solid Oxide Cell Reactor Model Used in rSOC Mode-Switching Analysis and Power Split Control of an SOFC-Battery Hybrid

ECS Transactions, vol. 111, pp. 1795–1801

Abstract

Defossilization of the global energy system requires a transition towards intermittent renewable energy sources and approaches that enable efficient conversion of primary energy sources into electrical energy. Due to their high efficiency in converting chemical into electrical energy and vice versa, solid oxide cell (SOC) systems provide solutions for both of these aspects. However, mode transitions in SOC operation require operating strategies to ensure that thermal gradients in the reactors are suppressed. In this study, two researched cases utilizing SOC’s are presented, based on simulation studies and experiments with an SOC multi-reactor module. The transient module model is validated in 75 kW electrolysis and polygeneration, and applied to analyze the effect of internal steam methane reforming on the temperature profile of the reactors. Subsequently, it is coupled with a validated Li-ion battery model, to test a rule-based power split control strategy suitable for a demand curve characteristic of a ship.

Authors 7

1. Santiago Salas Ventura

   Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

   Affiliation as printed

   German Aerospace Center (DLR)

   Institute of Engineering Thermodynamics

2. Matthias Metten

   Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

   Affiliation as printed

   German Aerospace Center (DLR)

   Institute of Engineering Thermodynamics

3. Marius Tomberg

   Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

   Affiliation as printed

   German Aerospace Center (DLR)

   Institute of Engineering Thermodynamics

4. Dirk Ullmer

   Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

   Affiliation as printed

   German Aerospace Center (DLR)

   Institute of Engineering Thermodynamics

5. Cem Ünlübayir Aachen

   RWTH Aachen University

   Affiliation as printed

   Chair for Electrochemical Energy Conversion and Storage Systems

   ISEA, RWTH Aachen University

6. Marc Philipp Heddrich

   Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

   Affiliation as printed

   German Aerospace Center (DLR)

   Institute of Engineering Thermodynamics

7. Syed Asif Ansar

   Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

   Affiliation as printed

   German Aerospace Center (DLR)

   Institute of Engineering Thermodynamics