Effects of relative humidity and particle type on the performance and service life of automobile cabin air filters
Effects of relative humidity and particle type on the performance and service life of automobile cabin air filters
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DOI：
10.1080/02786826.2016.1167832
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发表时间：
2016-01-01
影响因子：
5.2
通讯作者：
Wang, Jing
中科院分区：
文献类型：
--
作者：
He, Xu;Brem, Benjamin T.;Wang, Jing
车内空气滤清器是保护汽车乘客免受道路颗粒物污染的主要屏障。有许多关于其过滤效率方面的性能评价的研究。然而，关于它们的承载能力的知识仍然缺乏。同时，也没有定量的方法来估计适当的过滤器的使用寿命。本研究着重测试不同类型的客舱空气过滤器在不同相对湿度值和颗粒物类型条件下的负载能力。结果表明，当相对湿度增加时，活性炭涂层过滤器可以吸附大量的水，而不会显著增加压降。相比之下，正常纤维过滤器的水吸附量可以忽略不计。与仅负载亚利桑那州道路灰尘的过滤器相比，亚利桑那州道路灰尘和煤烟颗粒同时负载过滤器将导致负载曲线更陡峭，以及最具穿透力的颗粒尺寸向更小的直径移动。最后，提出了一种基于载荷曲线估算座舱空气滤清器合理使用寿命的新方法。
Cabin air filters are the main barrier for protecting automobile passengers from on road particulate matter. There are many studies about the evaluation of their performance in terms of filtration efficiency. However, the knowledge about the loading capacity of them is still lacking. Meanwhile, there has been no quantitative method to estimate the proper filter service life time. This study focuses on testing the loading capacity of different types of cabin air filters under the conditions of different relative humidity values and particle types. The results indicate that when the relative humidity increases, the activated carbon coated filters can adsorb significant amounts of water with no significant increase of the pressure drop. The normal fibrous filters show in contrast negligible water adsorbance. Compared with the filters loaded by Arizona road dust only, loading the filters by Arizona road dust and soot particles simultaneously will result in the steeper loading curves as well as the shift of most penetrating particle size to the smaller diameter. Finally, a new method to estimate the proper service life time of the cabin air filters is suggested based on the loading curves.