1. Universitat de les Illes Balears; Palma de Mallorca Illes Balears Spain
2. Department of Civil Engineering; Danmarks Tekniske Universitet; Brovej 118 Kongens Lyngby 2800 Denmark
3. Hogskolan Dalarna Falun Dalarna; Sweden
4. Solar Energy Research Center SERC, Department of Mathematics, Natural Sciences, and Technology; Dalarna University College; Borlänge Sweden
5. Malardalens Hogskola; Vasteras Sweden
6. PlanEnergi; Copenhagen Denmark