CHEMICAL ENGINEERING TRANSACTIONS VOL. 61, 2017 A publication of The Italian Association of Chemical Engineering Online at www.aidic.it/cet Guest Editors: Petar S Varbanov, Rongxin Su, Hon Loong Lam, Xia Liu, Jiří J Klemeš Copyright © 2017, AIDIC Servizi S.r.l. ISBN 978-88-95608-51-8; ISSN 2283-9216 Dynamic simulation of Reversible Solid Oxide Cell (RSOC) Hanaâ Er-rbib, Nouaamane Kezibri, Chakib Bouallou* MINES ParisTech, PSL Research University, Centre for Energy Efficiency of Systems, 60 bd Saint Michel, Paris, France chakib.bouallou@mines-paristech.frn A 1D dynamic model was developed in Matlab in order to study the Reversible Solid Oxide Cell (RSOC) behavior in transient state. It is a combination of kinetic, thermal and electrochemical models. The model was validated in steady state using available experimental results and showed a maximum relative error of 4.8 %. Therefore, the developed model can accurately simulate the RSOC performance. A dynamic simulation was performed to illustrate the temperature, the operating voltage and the outlet gas concentrations as a function of time and the fractional cell length for Power-to-Gas process that allows the storage of 10 MW of renewable energy. The co- electrolyser is operated under thermoneutral conditions at 1,073 K and 11,400 A/m². The obtained results showed that the cell has a thermal inertia that causes a temperature peak in dynamic state. This information is important because the temperature must be controlled in transient state to prevent the cell deterioration. It is observed that the operating voltage and outlet gas concentrations reach instantaneously the steady state while the temperature needs about 5 min to reach a constant value. 1. Introduction Electricity produced globally using renewable sources of energy, reached over 4,699 TWh in 2012. This number exceeds 20 % of the total production of the world electricity (20.8 % in 2012) (Observ’ER, 2013). The EREC (European Renewable Energy Council, 2012) expects 70 % of electricity production to come from renewable sources by 2050 of which 42 % are generated from new technologies (mainly wind and solar). Noting that, the use of renewable sources of energy (RE) must be accompanied by the concept of electricity storage in order to smooth the fluctuation of the RE. A new approach to seasonal storage of renewable energy is based on using excess electricity produced from a renewable source to co-electrolyze at high temperature (1,073 K) steam and CO2 into syngas via a RSOC (Reversible Solid Oxide Cell) operating in SOEC (Solid Oxide Electrolysis Cell) mode. The produced syngas (H2 and CO) is fed into a methanation reactor where it is converted into CH4. This gas is then injected into the natural gas network. When high consumption peaks appear, the RSOC is switched to SOFC (Solid Oxide Fuel Cell) mode which is fed by syngas. This latter is produced by tri-reforming of methane. The global diagram of this process is described in Figure 1 and detailed in Redissi et al. (2013). Figure 1: Reversible Power-to-Gas Process Methanation unit Upgrading unit Tri-reforming unit Synthetic Natural Gas Natural Gas H2O CO2 O2 Power To Gas Gas To Power H2, CO H2, CO SOEC SOFC Reversible Solid Oxide Cell (RSOC) DOI: 10.3303/CET1761177 Please cite this article as: Er-rbib H., Kezibri N., Bouallou C., 2017, Dynamic simulation of reversible solid oxide cell (rsoc), Chemical Engineering Transactions, 61, 1075-1080 DOI:10.3303/CET1761177 1075