Research on airliner cabin air filter performance 大型客机座舱空气过滤器性能研究. Junjie Liu Tianjin University. 概述 Outline. 研究背景 Background 飞机乘员健康的需要 The health of crew and passengers 国家发展战略的需要 The national development strategy 研究方法 Research methods 检测系统的搭建 The test rig building
SARS in 2003:8096 catch,774 death
H1N1 in 2009:14286 death
a typical case :in 2003,22 catch SARS on a airplane from HK to Beijing
Nano-particle concentration higher than other place
Nano-particle can enter lung and flood
Replace the existing
keep on or retire
大滤速high filtration velocity
用什么方法来评价航空过滤器evaluationmethodology for airliner cabin air filter
Air velocity meter and manometer
✈颗粒越大波动性越强，均匀性越差larger diameter lead to worse uniformity
0% efficiency test
✈ EN779： 0% efficiency test ：
✈ EN779： 100% efficiency test ：
100% 0efficiency test
The principle of the dilution
Larger flow lead lower η
Airflow rate affect UFP
concentration in cabin
η demonstrated a “U” shape.
MPPS decrease with the increase of airflow.
MPPS occur at 150nm for filter A，and 55 for B
研究结果Research results and discussion效率和风量的关系The relationship between filtration efficiency and airflow rate for different particle diameter ranges
效率随风量增大而减小For both the filters, the filtration efficiency all reduce with the increase of airflow rate
MPPS粒径范围内减小最快the greatest filtration efficiency reduction occurred at the MPPS range (100-250 nm for Filter A; <100 nm for Filter B)
压降随风量增大而增大The ΔP increases in response to the increased airflow rate for both of the test filters.
As the airflow rate increases from 1000 to 2200 m3 h-1, the increases of ΔP across Filter A and B were 100 Pa and 250 Pa, respectively.
大风量有利于舱内气流组织，但能耗大Larger Q is good for the air distribution in the cabin, while the energy consumption is larger.
研究结果Research results and discussion使用时间与容尘量的关系Estimated filter usage as a function of loaded dust mass under various in-cabin particle concentrations
估计不同舱内浓度水平下使用时间与容尘量的关系。Estimated filter usage as a function of loaded dust mass under various in-cabin particle concentrations
使用时间与容尘的量成正比the estimated filter usage is proportional to the mass of loaded dust
实验容尘与实际情况有一定的差异the particle loading on the filter is faster than the slow dust loading characteristic under the typical flying condition
差异的评估Estimate the difference
As the filter was loaded more dust, the filtration efficiency increase.
the largest increases observed at the MPPS
the filtration efficiency increases linearly as the loaded dust mass rises until 850 g; As the dust load increased from 850 g to 1000 g, the filtration efficiency increased more rapidly.
The pressure drop increases approximately 8 times more (~100 Pa to 800 Pa) as 1000 g dust was loaded on the filter.
as the filter was loaded more dust, the pressure drop increases more rapidly
Both filtration efficiency and pressure drop show a more rapid increase when the filter is used longer.
舱内浓度越低，效率、压降变化越平缓。达到同样的压降，使用时间越长。The lower cabin concentration, the efficiency and pressure drop change more Gentle
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