Reverse Electrodialysis Process with Seawater and Concentrated Brines: a COMSOL Multiphysics® Model for Equipment DesignM. Tedesco, A. Cipollina, C. Scavuzzo, A. Tamburini, G. Micale
Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica (DICGIM), Università di Palermo (UNIPA), Palermo, Italy
Salinity Gradient Power (SGP) is a promising renewable energy source associated to the controlled mixing of two aqueous solutions of different salinities. Recently, Reverse Electrodialysis process (SGP-RE, or RED) has been identified as a successful way for the exploitation of such energy source, allowing the conversion of SGP directly into electric energy. COMSOL Multiphysics® modelling activities have started focusing on the transport phenomena through membranes, assuming a laminar flow regime inside empty channels and describing the salt flux as transport of diluted electrolyte solutions. In spite of its simplifying approach, the developed COMSOL Multiphysics® model can simulate correctly all the main phenomena involved in the process, e.g. giving the trend of both concentration and voltage profiles inside the system.