1. Delft University of Technology,Delft,The Netherlands
2. Ricerca sul Sistema Energetico (RSE),Milan,Italy
3. Technical University of Denmark,Roskilde,Denmark
4. RWTH Aachen University,Aachen,Germany
5. AIT Austrian Institute of Technology,Vienna,Austria
6. Centre For Renewable Energy Sources and Saving (CRES),Athens,Greece
7. SINTEF Energy AS,Trondheim,Norway