Athanasios-Foivos (Nasos) Papathanasiou is a PhD Candidate in the Department of Water Resources and Environmental Engineering of the School of Civil Engineering at the National Technical University of Athens (NTUA). He holds a Diploma in Applied Mathematics and Physical Sciences (NTUA) and an MSc in Water Resources Science and Technology (NTUA). His research is concentrated on Renewable Energy Sources (RES), Water Resources Management, Hybrid Renewable Energy systems, Hydrogen Storage systems, Wind and Pumped Hydro Storage (PHS) systems, Energy Storage systems, RES based Desalination.