Univ. Grenoble Alpes, CEA, Liten, DTNM, Grenoble, France.
Indoor Air. 2022 Feb;32(2):e12990. doi: 10.1111/ina.12990.
On most modern airliners, cabin air pressurization, heating, and renewal are mainly achieved using air supplied from the gas turbine engines during flight. This air intake impairs the motors yield and needs to be conditioned, leading to energy overconsumption. Recent advances in thermal management enable aircraft manufacturers to reduce further the intake airflow needed to maintain cabin temperature at high altitude. Nevertheless, for lower air renewal rates, an appropriate air filtration system will be needed to maintain acceptable air quality in the cabin. In this context, Clean Sky 2 Joint Undertaking (CS2JU) project EC2S (Environment Control Secondary System) aims at developing an integrated filtration system to be implemented in existing cabin air management systems (so-called environmental control system-ECS). The EC2S unit will include three filtration units addressing separately volatile organic compounds (VOCs), CO , and particulate matter (PM). Circulated air in the ECS is conventionally filtered on pleated HEPA filters that generate substantial pressure drop. Since the EC2S VOCs and CO filtration units would generate additional pressure drop in the ECS system, electrostatic precipitation is foreseen as a low flow resistance alternative for PM removal. This paper reports the development and performance assessment of a two-stage electrostatic precipitator (ESP) designed for aircraft recirculated air filtration. The ESP prototype presents high single-pass particle collection rates (i.e., over 90% for airborne particles with an aerodynamic diameter of 0.5 μm or larger), low-pressure drop (i.e., 4 Pa at nominal flowrate), and a limited ozone generation rate (i.e., below 8 mg h ).
在大多数现代客机上，机舱空气的增压、加热和更新主要是通过飞行中使用的燃气涡轮发动机供应的空气来实现的。这种进气口会损害发动机的效率，需要进行调节，导致能源过度消耗。最近在热管理方面的进展使飞机制造商能够进一步减少维持高空机舱温度所需的进气流。然而，对于较低的空气更新率，需要适当的空气过滤系统来维持机舱内可接受的空气质量。在这种情况下，清洁天空 2 联合企业（CS2JU）项目 EC2S（环境控制辅助系统）旨在开发一种集成过滤系统，该系统将被应用于现有的机舱空气管理系统（即环境控制系统-ECS）。EC2S 单元将包括三个过滤单元，分别针对挥发性有机化合物（VOCs）、CO 和颗粒物（PM）。ECS 中的循环空气通常经过褶式高效空气过滤器过滤，这会产生大量的压降。由于 EC2S 的 VOCs 和 CO 过滤单元会在 ECS 系统中产生额外的压降，因此预计静电沉淀是去除 PM 的低流量阻力替代方案。本文报告了一种用于飞机再循环空气过滤的两级静电除尘器（ESP）的开发和性能评估。ESP 原型具有很高的单次通过颗粒收集率（例如，对于空气动力学直径为 0.5 μm 或更大的空气传播颗粒，收集率超过 90%）、低压降（即，在标称流量下为 4 Pa）和有限的臭氧生成率（即，低于 8 mg h）。
