1. Center
for Energy Convergence Research, Green City Research Institute, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
2. Department
of Energy and Environmental Engineering, Korea University of Science and Technology, 176 Gajungro Yuseong-gu, Daejeon 305-350, Republic of Korea
3. Department
of Energy and Environmental Engineering, Shinhan University, 233-1, Sangpae-dong, Dongducheon, Gyeonggi-do 483-777, Republic of Korea