【摘要】 为了对载人航天器中 SPE制氧系统进行优化改进 ,根据热力学守恒定律、能量输运规律以及相关电化学理论 ,建立了系统工作过程的数学模型 ,通过数值模拟方法对系统进行了性能分析。结果表明 ,提高电解槽工作电流密度 ,不仅有利于提高电流效率和氧产量 ,也有利于减小单位产氧量的电耗 ;而提高氧、氢产品背压会对系统工作产生不利影响 ,产氧量下降 ,且单位产氧量的电耗升高 ;工作温度的提高 ,既有正面影响 ,如理论分解电压下降 ,单耗减小 ,也有负面影响 ,如造成电流效率降低 ,产氧量下降。研究结果对载人航天器中水电解制氧系统的设计及运行有一定指导意义。更多还原

【Abstract】 A mathematical model including thermodynamics, energy transport and electrochemistry was used to optimize the SPE oxygen generation system in a manned spacecraft. The results show an increased current density not only increase the current efficiency and the oxygen yield, but also reduces the per oxygen power consumption. An increased oxygen and hydrogen back pressure causes problems, such as increased power consumption and reduced oxygen yield. Increasing the working temperature of the electrolytic cell reduces the theoretical decomposition voltage; however, the oxygen generation is also reduced resulting in increased power consumption.更多还原