Solid oxide cell can switch between fuel cell power generation mode and electrolytic cell hydrogen production mode

realizing high conversion efficiency between electric energy and chemical energy while greatly improving equipment utilization

and thus has great potential for widespread application. In this paper

a simulation model of the power generation/hydrogen production dual-mode system for recycling reversible solid oxide cell is established. The effects of fuel utilization and recirculation ratio on the performance of the reversible system are analyzed from the perspectives of efficiency

voltage

and flow rate parameters. In the power generation mode

the output power of the stack can be increased by increasing the fuel utilization rate

and increasing the recirculation ratio can decrease the energy consumption of the system by reducing fuel flow

which collaboratively improve the system efficiency to 52.07%. In the hydrogen production mode

the hydrogen production power consumption of the stack can be reduced by increasing the fuel utilization; however

an increased recirculation ratio decreases the power consumption of electric heating while increasing the power consumption of hydrogen production

resulting in a maximum system efficiency of 79.62%.