The chemical storage of electricity realized by hydrogen-based systems is an interesting option that, recently, has received great attention. A promising storage technology is based on a reversible solid oxide cell (ReSOC), that can operate reversibly either as a fuel cell (SOFC) or as an electrolyser (SOEC). In this paper a numerical model to predict the behavior of ReSOC in both operating modes is proposed. The model, based on a system-level SOFC model calculates the system losses (activation, ohmic and concentration overpotentials) by means of electrochemical equations. The model, developed by using the Aspen Plus code, is based on fundamental electrochemical and physical relationships, such as the Butler-Volmer (BV) equation and Fick's law. In order to estimate the calibration parameters of the model equations a fitting procedure is carried out by using the available experimental data.
ELECTROCHEMICAL MODELS DEVELOPMENT FOR THE PREDICTION OF SOFC AND SOEC BEHAVIORS AND PERFORMANCE
PERNA, Alessandra;
2015-01-01
Abstract
The chemical storage of electricity realized by hydrogen-based systems is an interesting option that, recently, has received great attention. A promising storage technology is based on a reversible solid oxide cell (ReSOC), that can operate reversibly either as a fuel cell (SOFC) or as an electrolyser (SOEC). In this paper a numerical model to predict the behavior of ReSOC in both operating modes is proposed. The model, based on a system-level SOFC model calculates the system losses (activation, ohmic and concentration overpotentials) by means of electrochemical equations. The model, developed by using the Aspen Plus code, is based on fundamental electrochemical and physical relationships, such as the Butler-Volmer (BV) equation and Fick's law. In order to estimate the calibration parameters of the model equations a fitting procedure is carried out by using the available experimental data.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
