Comparative analysis of SOFC-MGT top-level and new bottom-level system performance Qiao Run-Peng, He Jun-Neng, Liang Qian-Chao, Yang Fan and Fu Da-Wang E3S Web Conf., 271 (2021) 04013 Published online: 15 June 2021 DOI: 10.1051/e3sconf/202127104013