1. Beijing Municipality Key Lab of Heating, Gas Supply, Ventilation and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing, People’s Republic of China
2. Collaborative Innovation Center of Energy Conservation & Emission Reduction and Sustainable Urban-Rural Development in Beijing, Beijing University of Civil Engineering and Architecture, Beijing, People’s Republic of China
3. College of civil engineering, Hunan University, Hunan, People’s Republic of China
4. Department of Electrical Engineering and Energy Technology, University of Vaasa, Vaasa, Finland