1. Dept. of Mechanical Engineering Science, Graduate School of Engineering, Kyushu Univ., 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, JP.
2. Dept. of Mechanical Engineering, Faculty of Engineering, Kyushu Univ., 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, JP.
3. The Research Center for Hydrogen Industrial Use and Storage (HYDROGENIUS), National Institute of Advanced Industrial Science and Technology (AIST), 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, JP.