Research progress and prospects on flow field design and optimization of reversible solid oxide cells
As a kind of clean energy,hydrogen energy has a clean utilization process and can be effectively combined with intermittent renewable energy to achieve energy saving and emission reduction.As a device that can effectively utilize and manufacture hydrogen energy,the reversible solid oxide cell(RSOC)has two modes of operation:fuel cell and electrolyzer,which has attracted widespread attention.The flow field structure of the RSOC has an important influence on its performance,which is manifested in the influence of the shape,size and gas configuration of the flow channel on the internal gas flow characteristics of the RSOC.The uniform gas distribution and excellent diffusion process are conducive to the improvement of the output performance and stability of the cell.This review summarizes the structural characteristics of traditional flow fields such as parallel,serpentine,and interdigitated in RSOCs,and cell output characteristics with novel flow fields such as X-type and three-dimensional mesh.The existing research on related flow field optimization methods are discussed in detail in order to provide a comprehensive overview of the latest advances in this field.The results show that the traditional flow field can be improved for the gas flow characteristics inside the RSOC by optimizing the operating conditions such as temperature,pressure,and gas flow rate,selecting suitable electrolytes,electrode structural parameters,and cathode and anode gas flow configurations,as well as setting up flow channel barriers to promote the gas mass transfer and diffusion processes.Meanwhile,designing the novel flow field structure and porous medium flow field is also another way to improve the gas flow state.
reversible solid oxide cellsflow field structural characteristicsoptimal designthermodynamics process
万方数据
维普
