不同温度下URFC模式切换中两相流及电压响应

Two-phase Flow and Voltage Dynamic Response of URFCs during Mode Switching under Different Temperatures

中文关键词: 一体式再生燃料电池  模式切换  两相流  可视化观测

英文关键词: Unitized regenerative fuel cell  Mode switching  Two-phase flow  Visual observation

中文摘要:

      通过实验得到了一体式再生燃料电池(unitized regenerativefuel cell, URFC) 模式切换过程中电池内 部的两相流观测可视化结果以及同步电压动态变化情况, 讨论了温度影响下燃料电池和电解池模式切换过 程中的两相流动规律以及同步电池电压的变化规律。 实验结果显示: 当电解池直接切换到燃料电池模式时, 由于水淹的影响, 电池电压接近0.0 V, 同时受温度影响不大; 当电池在运行不供水电解模式下120.00 s 后切 换时, 电池能够在高温状态下切换至燃料电池模式, 且温度较高时氧气侧水淹较弱。 燃料电池向电解池模式 切换时, 温度和电流密度的高低同样会影响电解模式下的性能稳定性。

英文摘要:

      An experimental study was conducted to obtain the two-phase flow observation behaviors and the simultaneous voltage dynamic behaviors of a unitized regenerative fuel cell during mode switching procedure. The two-phase flow principle and voltage changing characteristics of unitized regenerativefuel cell during mode switching procedures between fuel cell mode and electrolysis cell mode was discussed at different temperatures. Experimental results show that during the mode switching from electrolysis cell to fuel cell mode, because of waterflooding, the cell voltage is close to 0.0 V, and the temperature exhibits obscure effect; while the cell mode switches to fuel cell mode from electrolysis cell mode after operating without watersupplyingfor120.00 s, it can be switched to fuel cells mode under high temperature conditions, and higher temperature weakens water flooding. When it switches to electrolysis cell mode, the temperature condition and current density levels also affect the performance at electrolysis mode