中文摘要：

以木片气化气为燃料，建立中温型固体氧化物燃料电池（intermediate temperature solid oxide fuel cell，IT-SOFC）/燃气轮机（gas turbine，GT）混合动力系统的详细模型，分析混合动力系统的运行性能，研究生物质气的组分和水碳比的变化对混合动力系统性能的影响。结果表明，在设计工况下，以木片气化气为燃料的 IT-SOFC/GT 混合动力系统的发电效率高达59.24%，具有较好的系统性能。生物质气组分的变化对混合动力系统性能影响很大，H2百分比的变化使系统输出功率变化幅度最大，CO和CH4相近，系统的发电效率随H2百分比增加略有上升，随CO和CH4百分比的增加下降明显。研究还表明，当水碳摩尔比（[S]/[C]）改变时，系统输出功率和发电效率随着[S]/[C]的减小而逐渐增加，但从系统运行安全性和寿命方面考虑，应选择适当的[S]/[C]值。

英文摘要：

The detailed model of intermediate temperature solid oxide fuel cell （IT-SOFC） and gas turbine （GT） hybrid system fueled with wood chip gasified gas was built. System operating performance was analyzed and the influence of biomass gas composition and steam/carbon molal ratio（[S]/[C]） was studied. The results show that, hybrid system electrical efficiency can reach up to 59.24% at design condition, and the system demonstrates excellent performance. The change of biomass gas composition has significant influence to system performance. The change of H2proportion is most influential to system output power, CO and CH4 have similar influence trend. System electrical efficiency increases slightly with the change of H2 proportion while decreasing significantly with the increase of CO and CH4 proportion. Also, the decrease of [S]/[C] ratio gradually enlarges system output power and electrical efficiency, but in consideration of the system operating security and lifetime, [S]/[C] ratio should be chosen appropriately.