三类固体氧化物燃料电池发电系统热力学分析

Thermodynamic analysis of three kinds of solid oxide fuel cell power-generating systems

建立了适用于发电系统的直接内部重整固体氧化物燃料电池(SOFC)的数学模型,对以CH4为燃料的3种SOFC发电系统进行了热力学分析.为提高整个系统的发电效率,采用的概念对系统中热力设备的可用能损失进行了分析.计算结果表明,对于由SOFC和燃气轮机组成的联合发电系统,其发电效率可达60%,整个系统的联合热电效率约为80%.

Thermodynamic models were established for three types of internal-reforming solid oxide fuel cell （IR-SOFC） power-generating systems fed by methane, To determine the efficiency of the systems, the exergy concept was used to analyze thermodynamic losses in each unit and to assess the work potential of the streams of matter, A full analysis of the energy and exergy at each node of the systems was conducted. Resuits show that a hybrid IRSOFC-gas turbine system can achieve an electrical efficiency of more than 60% and a total efficiency of about 80%.