1. Department of Energy Systems Engineering, Chung-Ang University, Seoul, 06974 Republic of Korea
2. Department of Smart Cities, Chung-Ang University, Seoul, 06974 Republic of Korea
3. Department of Engineering Chemistry, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju-si, Chungbuk 361-763, Republic of Korea