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芯的预测模型。模型中的原理可以扩展到燃料电池加湿器，但需要进行修改，以应对耗氧气流的更高温度和运行压力、接近饱和的蒸汽压和雷诺数。此外，模型组件尚未集成到CORE可以使用的设计工具中。我们建议开展工作来填补这些空白。具体地说，我们需要验证一种新的复合膜模型，该模型可以将聚合物性质与湿度和温度相关的膜模型联系起来。接下来，必须将膜模型用于流道阻力关联，以考虑表面粗糙度和流道几何形状的影响。然后，通道模型将用于逆流、准逆流和横流构型的岩心模型。最后，将核心模型与全核心的性能测量进行比较。我们还建议扩展以前对流道几何增强的研究，以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.