1. Building Energy and Environmental Technology Research Unit, Division of Building Science and Technology, City University of Hong Kong, Tat Chee Avenue, Hong Kong
2. Centre for Energy Studies, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 11 00 16, India
3. CETHIL UMR 5008, Domaine Scientifique de La Doua, INSA de Lyon, 9 Rue de la Physique, 69621 Villeurbanne Cedex, France