Experimental process investigation of a latent heat energy storage system with a staggered heat exchanger with different phase change materials for solar thermal energy storage applications - Tsolakoglou, Nikolas P; Koukou, Maria K; Vrachopoulos, Michalis Gr; Tachos, Nikolaos; Lymberis, Kostas; Stathopoulos, Vassilis (E3S Web of Conferences, 2017)