1. Department of Mechanical System Engineering, University of Hiroshima, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
2. School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
3. Institute for Energy Research, Jiangsu University, NO.301 XueFu Road, Zhenjiang 212013, China