Off-design performance analysis for an integrated system of solid oxide fuel cell and supercritical carbon dioxide Brayton cycle with CO2 capture

•Integrate solid oxide fuel cell with supercritical carbon dioxide Brayton cycle and CO2 capture.•60.96% of net electrical efficiency and 0.342 kg/kWh reducing CO2 emission are achievable.•Develop detailed off-design models of components and system.•Investigate three key operating parameters’ effects on system performance.•Propose system control strategy to investigate part-load system performance.