Dr. Harald Mehling, born: 03.08.1966 Education: M.A. (SUNY Buffalo, USA), 1992; Diploma Physics, University of Wurzburg (Germany), 1995; Ph.D., University of Wurzburg (Germany), 1998 Since 1995 working at the Bavarian Center for applied Energy Research, since 1998 Group leader "Latent heat storage" Coordinator of the BMWA funded strategic project "Innovative PCM-technology" (budget about 6 Mio aC--, 1999-2004) Organizer of two workshops on latent heat storage Author or co-author of about 50 publications, with more than 20 reviewed Books contributions (4 chapters): Thermal energy storage for sustainable energy consumption - fundamentals, case studies and design; NATO Science series II. Mathematics, Physics and Chemistry - Vol. 234, Springer, 2007, ISBN 978-1-4020-5289-7 Editor: H.O.Paksoy Luisa F. Cabeza is Professor on Thermal Engineering at the University of Lleida (Lleida, Spain). She graduated on Chemical Engineering and Industrial Engineering in 1992 at University Ramon Llull (Barcelona, Spain), in 1995 she got an MBA and in 1996 her PhD on Industrial Engineering at the same university. From 1996 to 1998 she worked at the Eastern Regional Research Center, Agricultural Research Service, United States Department of Agriculture (Philadelphia, USA). In 1999 she joined the University of Lleida as Assistant Professor, and she became Full Professor in 2006. She lead the Research Group on Applied Energy at the same university, today a research group with 25 researchers, recognised by several Spanish Agencies for its work.