1. Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 999077, China
2. Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong 999077, China
3. Department of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei, Anhui 230026, China