Thermodynamic Modelling of Solid Oxide Fuel Cell Integrated with Blade Cooled Gas Turbine Hybrid Cycle 2018-32-0062
In the area of clean energy production along with higher efficiency, integrated combine power system specifically gas turbine (GT) cycle with solid oxide fuel (SOFC) system is gaining the attention of researchers. In this article, thermodynamic modelling has been presented for SOFC-GT hybrid cycle. A high-temperature SOFC has been successfully integrated with recuperated-blade cooled gas turbine cycle for the proposed hybrid cycle. Using recuperator, the waste heat available at the gas turbine outlet has perfectly been utilized to power up the fuel cell system. However, to maintain the temperature of gas turbine blade within permissible limit, air-film blade cooling scheme has been used. The SOFC-GT hybrid cycle has been operated under steady state condition, and developed MATLAB program has used to solved the governing equations for the components of hybrid cycle. The impact of main operating parameters such as turbine inlet temperature (TIT), compression ratio (rpc), fuel utilization ratio (UF), recirculation ratio is examined. From the obtained result, it can be revealed that the integration of the SOFC has seen significant improves overall hybrid cycle efficiency. The performance of fuel cell (SOFC) increases notably as the level of recuperation increases. To check the influence of main operating parameters, a sensitivity analysis has been performed for the hybrid cycle, and the maximum efficiency of 73% has been achieved. Moreover, to extend this research, an exclusive performance map has been plotted for power plant designer.