运行参数对高温燃料电池物质分布与启动时间的影响研究

Effect of Operating Parameters on Material Distribution and Start-up time of High Temperature Fuel Cells

使用comsol软件,建立高温质子交换膜燃料电池电化学传热传质三维数值模型,通过改变电池的电压和入口温度,分析运行参数对电池内物质分布以及启动时间的影响。结果表明,随着进气温度的升高和电压的降低,电池反应物的消耗量及水的生成量在不断增加,启动时间也随之缩短。电压低于0.4V以下时,会导致阴极氧气不足产生“饥饿”现象。并且当进气温度高于150℃时,提高进气温度对启动时间的影响会大幅减少。即0.4V的启动电压及150℃的进气温度是一个比较合适的启动参数。

In this paper,comsol software was used to establish a three-dimensional numerical calculation model for electrochemical heat and mass transfer of high temperature proton exchange membrane fuel cells.The effects of battery voltage and inlet temperature on material distribution and start-up time were analyzed by changing operated parameters.The results show that with the increase of inlet temperature and the decrease of voltage,the consumption of battery reactants and the amount of water generated increase continuously,and the start-up time decreases.When the voltage is below 0.4V,it will lead to the"hunger"phenomenon of insufficient cathode oxygen.And when the intake air temperature is higher than 150℃,the influence of increasing the intake air temperature on the starting time will be greatly reduced.That is,0.4V starting voltage and 150℃intake temperature are a more suitable starting parameters.