1. Beijing Key Lab of Heating, Gas Supply, Ventilating and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
2. Key Laboratory of Heat Transfer Enhancement and Process Energy Conservation, Beijing University of Technology, Beijing 100124, China
3. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
4. Birmingham Center for Energy Storage, University of Birmingham, Birmingham B15 2TT, UK