1. Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei 515, Taiwan
2. Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 70101, Taiwan
3. Mem. ASME Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
4. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong