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Effects Of Ambient Temperature And Relative Humidity On The Performance Of Nexa Fuel Cell

机译：环境温度和相对湿度对Nexa燃料电池性能的影响

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摘要

The actual inner workings of a fuel cell are fairly well known, as are the performance maps of the devices composing the balance of plant. It is the interaction of these devices, as controlled by the fuel cell engine's control strategy, which introduces variability to fuel cell engine performance. The control strategy must be able to meet the conditions required for efficient stack operation under all operating conditions associated with a potential application. A Nexa commercial fuel cell engine was selected in order that the findings of this study may be immediately relevant. In the present study, changes in the Nexa's performance are investigated by varying the ambient temperature and relative humidity. Our experiments showed that the ambient temperature directly affects the heat exchanger fan power consumption and the maximum power with a statistically significant effect on net efficiency. The ambient relative humidity played a statistically insignificant role in determining the net efficiency of the Nexa. However, the increased frequency and duration of the anode purges indicate an evidence that flooding was beginning to occur, which suggests that the Nexa's water management control strategy is not aggressive enough to deal with high-temperature and high-humidity conditions.
机译：燃料电池的实际内部工作以及构成植物平衡的设备的性能图都是众所周知的。这些设备的交互作用（由燃料电池发动机的控制策略控制）将燃料电池发动机性能的可变性引入。控制策略必须能够满足与潜在应用程序相关的所有操作条件下有效的堆栈操作所需的条件。选择了Nexa商业燃料电池发动机，以使这项研究的结果立即相关。在本研究中，通过改变环境温度和相对湿度来研究Nexa性能的变化。我们的实验表明，环境温度直接影响热交换器风扇的功耗和最大功率，对净效率有统计学上的显着影响。在确定耐克萨斯的净效率方面，环境相对湿度在统计学上无足轻重。但是，阳极吹扫的频率和持续时间的增加表明有迹象表明洪水开始发生，这表明Nexa的水管理控制策略不足以应对高温和高湿条件。

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