Moisture exchangers: connecting material properties to core performance

在过去的4年里，UBC研究人员与CORE合作开发了膜，流道和完整ERV核心的预测模型。 模型中的原理可以扩展到燃料电池加湿器，但需要修改以处理更高的温度和缺氧空气流的操作压力，接近饱和蒸汽压和雷诺数。此外，模型组件尚未集成到CORE可以使用的设计工具中。我们建议开展填补这些空白的工作。 具体来说，我们需要验证一个新的复合膜模型，可以链接到湿度和温度依赖的膜模型的聚合物特性。 其次，膜模型必须用于流动通道阻力相关性，允许表面粗糙度和通道几何形状的影响。 然后，通道模型将用于逆流、准逆流和横流配置的堆芯模型。最后，核心模型将与完整核心的性能测量进行比较。 我们还建议，以前的研究流动通道的几何增强扩展到确定特定应用的最佳几何形状。

Over the last 4 years, UBC researchers working with CORE have developed predictive models of membranes, flow passages and full ERV cores. The principles in the model could be extended to fuel-cell humidifiers but would require modification to deal with much higher temperatures and operating pressures of oxygen-depleted air streams, near saturation vapor pressures, and Reynolds numbers. Further, the model components have not been integrated into a design tool that can be used by CORE. We propose work that would fill these gaps. Specifically, we need to validate a new composite membrane model that can link polymer properties to humidity- and temperature-dependent membrane models. Next, the membrane models must be used in flow passage resistance correlations, allowing for the effect of surface roughness and channel geometry. The passage models will then be used in core models for counterflow, quasi-counterflow, and crossflow configurations. Finally, the core models will be compared against performance measurements of full cores. We also propose that previous studies of flow channel geometric enhancements be extended to identify optimal geometries for specific applications.