抄録
Solid oxide fuel cell (SOFC) shows excellent stability in the material compared with other type fuel cells because electrolyte and electrode of SOFC are chiefly composed of ceramics, and the generation efficiency is expected to achieve over 50%. In addition, it is reported that the generation efficiency is improved further by combining with gas turbine (SOFC-GT combined cycle) by using the feature with the high operating temperature. On the other hand, it is problem that the materials of peripherals and pipes, etc used in SOFC system are restricted and high cost. And the thermodynamic feature is not understood enough about SOFC-GT combined cycle. Therefore, we analyzed the heat and mass balance of SOFC-GT combined cycle based on the experimental data of material developed for low temperature operating SOFC cell. And the influence that some parameters, such as the operating temperature and fuel utilization ratio of SOFC, pressure ratio and turbine inlet temperature (TIT) of GT gave generation efficiency was examined to understand the thermodynamic feature of SOFC-GT combined cycle. We could obtain some results about characteristic of SOFC-GT combined cycle.
