1. Lecturer Department of Mechanical Systems Engineering, The University of Kitakyushu, 1-1, Hibikino, Wakamatsu, Kitakyushu City, Fukuoka, 808-0135, Japan e-mail:
2. Associate Professor Department of Energy and Environmental Engineering, Kyushu University, 6-1 Kasuga-Koen, Kasuga City, Fukuoka, 816-8580, Japan e-mail:
3. Professor Emeritus Department of Energy and Environmental Engineering, Kyushu University, 6-1 Kasuga-Koen, Kasuga City, Fukuoka, 816-8580, Japan e-mail: