重整条件对SOFC电池堆性能影响的实验研究

Effects of Reforming Conditions on Performance of the SOFC Stack

以天然气为燃料,建立了外部重整固体氧化物燃料电池(SOFC)系统的实验平台,在不同重整工艺参数条件下,对电池堆的性能进行了测试,得到了电池堆性能参数的变化趋势,分析了水碳物质的量比(即水碳比)、重整温度、重整方式以及天然气体积流量对SOFC电池堆性能的影响.结果表明:在不同的电流密度下,采用水蒸气重整方式电池堆的输出功率高于自热重整方式电池堆的输出功率;当电池堆工作温度设定恒值为1 023K时,随着水碳比的增大,电池堆的输出功率逐渐提高,随着天然气体积流量的增加,电池堆的输出功率显著提高.

Taking natural gas as the fuel, an external reforming experimental platform of solid oxide fuel cell （SOFC） system was established, so as to test the performance of the SOFC stack under different reforming conditions, and to analyze the effects of following factors on the stack performance, such as the wa- ter-carbon ratio, reforming temperature, reforming mode and natural gas flow, etc. Results show that un- der different current densities, the power output of SOFC stack using steam reforming is higher than that using auto-thermal reforming. When the stack working temperature is constantly set at 1 023 K, the power output of SOFC stack gradually increases with the rise of steam-carbon ratio, which significantly im- proves with the rise of natural gas flow.