摘要
煤气化燃料电池联合发电系统以其高效率、低排放等优点成为煤炭高效清洁利用的理想方式之一。利用商用计算流体力学软件(CFX4.4)以及针对化学反应、电化学反应、传热传质和电流电势开发的程序,研究了煤气化合成气为燃料的平板式电极支撑高温固体氧化物燃料电池性能。在计算工况下,以煤气合成气为燃料,有较大温差,约为300 K。沿气流方向,电解质层电流密度变化较缓慢,但在电池横截面方向电流密度波动剧烈。在相同电流密度下,煤气化合成气为燃料的燃料电池Nernst电动势和功率比纯氢气情况要低,但和以天然气(CH4)为燃料情况相当。
Integrated gasification fuel cell combined cycle （IGFC-CC） is the optimal choice of coal utilization with its high energy efficiency and low pollution emission. Based on the commercial computational fluid dynamic software （CFX4.4） and program relating to chemical/electrochemical reactions, mass/heat transfer, current and electric potential, the performance of planar electrode supported solid oxide fuel cell （PES-SOFC） with syngas as fuel was investigated. As the result shows, under all calculation conditions, the temperature gradient is large and the maximum temperature difference is about 300 K in SOFC. And the decrement of molar fraction of hydrogen is larger than that of carbon monoxide. The variation of current density in electrolyte layer is relatively slow in the direction of gas flow but obvious in the direction vertical to gas flow. Under the same conditions, the Nernst potential of SOFC with syngas as fuel is lower than that with hydrogen as fuel but similar to that with natural gas as fuel.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第35期88-93,共6页
Proceedings of the CSEE
基金
上海市科委科技攻关计划(08DZ1200102)
国家重点基础研究发展计划项目(973项目)(2007CB210102)~~
作者简介
于建国（1983），男，博士研究生，主要研究方向为燃料电池及IGFC发电系统，ferret@@u．edu．cn；
王玉璋（1973），男，博士，副教授，主要研究方向为多相流、传热传质、燃料电池及氢能利用，yuzhangwang@sjtu．edu．cn；
翁史烈（1932），男，中国工程院院士，主要研究方向为热力系统的稳态动态性能及计算机仿真。
