research on airliner cabin air filter performance 大型客机座舱空气过滤器性能研究
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
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
主要设备的选择 The main equipment
机舱过滤器机舱过滤器检测系统的标定 Qualification of the test rig
研究结果 Research results and discussion 不同风量下的效率 Particle filtration efficiencies as a function of particle size
for various airflow rates
压降和风量的关系 Pressure drop across the cabin filter as a function of airflow rate
容尘对效率、压降的影响。 The influence of dust load on the performance of the airliner cabin air filter
展望 outlook2
研究背景 - 乘客健康的需要Background- The health of crew and
passengers
3
time Cabin return air ratio Problem in the cabin
before the 1960 s 100%fresh air good IAQ
after the 1960 s 50 %fresh air+50 %return air
Mass of passengers and food diffuse high concentration ultrafine particles
passengers cough diffuse much bacterium and virus
large proportion of UFP can enter the airliner cabins at Waiting times
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
研究背景 - 乘客健康的需要Background- The health of crew and
passengers
4
Nano-particle can enter lung and flood
Nano-particle concentration higher than other place
(姚, 2008)
roadhousing estate
indoor
airport
Co
nce
ntr
atio
n(
p/
cc)
diameter
de
po
sit
ion
total
upper airways
bronchus
lung
downstreamupstream超细颗粒危害大
研究背景 - 国家发展战略的需要Background- The national development
strategy
5
New demand
Replace the existing
keep on or retire
国内空白 gap :没有自己知识产权的航空滤料material没有相关的评价方法 evaluation methodology没有自己的过滤器适航标准airworthiness standard
研究背景 - 技术瓶颈Background- technique difficulty
过滤材料 material
容尘量 Dusting-holding Capacity
防火阻燃要求 fire prevention
大滤速 high filtration velocity
过滤器结构 structure
抗震 bear shock
评价方法 evaluation methodology
用什么方法来评价航空过滤器 evaluation methodology for airliner cabin air filter
6
研究方法 Research methods
检测系统的搭建 The test rig building
主要设备选择 The main equipment
速度与气溶胶均匀性的标定 air velocity uniformity and aerosol uniformity
0 效率与 100% 效率试验 0% efficiency test and 100% 0efficiency test
稀释器的标定 dilution factors
7
1. 高效过滤器 2. 发尘口 3. 温湿度传感器 4.上游采样口 5. 检查窗 6. 支架 7. 压差传感器8. 均流板 9. 被测过滤器 10. 管道 11. 滑轨支架 12. 下游采样口 13. 检查窗 14. 压差传感器15. 均流板 16. 喷嘴流量计 17. 风机 18. 软连接 19. 滑轨 20. 地面
研究方法 Research methods检测系统的搭建 The test rig building
8
0.E+00
2.E+06
4.E+06
6.E+06
8.E+06
1.E+07
0.1 1 10
浓度(个
/cm
3 )
粒径(μm)
0.E+00
3.E+05
6.E+05
9.E+05
1.E+06
2.E+06
2.E+06
2.E+06
2.E+06
25 67 109 152 194 236 278 320 362 405 447 489
个/c
m3
粒径(nm)
空气出口
空气进口
流量测量段 风机段下游稳定段测过滤器段上游稳定段
T,¦ Õ1
23 4
8
7
9
12
5
14
15 16
17
116
101813
20 19
研究方法 Research methods主要设备 The main equipment
9
Air velocity meter and manometer
Particle generator
Part
icle
cou
nte
rs
DMA : 8-1000nm
AC generator
仪器经标定后均满足标准要求
研究方法 Research methods发尘器粒径分布 The diameter distribution
10
0.E+00
3.E+05
6.E+05
9.E+05
1.E+06
2.E+06
2.E+06
2.E+06
2.E+06
25 67 109 152 194 236 278 320 362 405 447 489个
/cm3
粒径(nm)
0.E+00
2.E+06
4.E+06
6.E+06
8.E+06
1.E+07
0.1 1 10
浓度(个/cm
3 )
粒径(μm)
研究方法 Research methods速度与气溶胶均匀性的标定 air velocity uniformity
and aerosol uniformity
11
✈EN779 要求风速均匀性的偏差系数 <10% ✈ EN779 要求浓度均匀性的偏差系数 <15%
✈颗粒越大波动性越强,均匀性越差
✈EN779 : velocity uniformity<10% ✈ EN779 : concentration
uniformity<15%✈颗粒越大波动性越强,均匀性越差larger diameter lead to worse uniformity
研究方法 Research methods0 效率与 100% 效率试验 0% efficiency test and
100% 0efficiency test
12
✈ EN779 : 0% efficiency test : d>1μm,±3% d< μm,±7%
✈ EN779 : 100% efficiency test : >99%
33000
63000
93000
123000
153000
183000
213000
0 5 10 15 20 25 30
浓度(个
/cm3)
时间(min)
发尘稳定性验证
0.02-0.03μm(cv=1.77%)0.03-0.05μm(cv=2.64%)0.05-0.07μm(cv=3.89%)0.07-1μm(cv=3.8%)
Aerosol stable
C
t-1.0%
-0.5%
0.0%
0.5%
1.0%
1.5%
2.0%
第一次试验 第二次试验 第三次试验
效率
0效率的验证
>1μm
<1μm
0% efficiency test
effi
cie
nc
y
98.8%99.0%99.2%99.4%99.6%99.8%
100.0%
0 100 200 300
效率
粒径(nm)
100%效率验证100% 0efficiency test
effi
cie
nc
y
d
研究方法 Research methods稀释器的标定 dilution factors
13
Q
Q2
Q1
S2
S1
绝对过滤器
毛细管Q
The principle of the dilution
di l ut i on f actors
0
20
40
60
80
100
120
0 100 200 300 400 500 600
di ameter/ nmdi
luti
on f
acto
rs
研究结果 Research results and discussion不同风量下的效率 Particle filtration efficiencies as a function of particle size for various airflow rates
14
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
H11
F7
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
15
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)
研究结果 Research results and discussion压降和风量的关系 Pressure drop across the cabin filter
as a function of airflow rate
16
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
17
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
)/( QCPT
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 ?
研究结果 Research results and discussion不同容尘阶段的效率 Filtration efficiencies for different
dust load levels
18
容尘的量越大,效率越高As the filter was loaded more dust, the filtration efficiency increase.
在 MPPS 处,效率上升最快the largest increases observed at the MPPS
850g 以下,线性变化; 850g以上剧烈变化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.
研究结果 Research results and discussion压降与容尘的量的关系 Pressure drop across the cabin
filter as a function of loaded dust mass on the filter
19
容尘的量越大,压降越大。容 1000g尘,压降增大 8 倍。The pressure drop increases approximately 8 times more (~100 Pa to 800 Pa) as 1000 g dust was loaded on the filter.
曲线斜率变大:越容尘,压降增大越快。as the filter was loaded more dust, the pressure drop increases more rapidly
研究结果 Research results and discussion效率、压降与容尘的量的关系 Total filtration efficiencies
and pressure drops as a function of filter usage time
20
使用时间越长,效率越高,压降越大。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
展望 outlook
容尘达到多少时,过滤器不能继续使用。 How much dust the filter load , it’s performance became worse
在机舱内一定颗粒物浓度水平下,航空过滤器容尘量指标如何才能满足使用要求。 under a in-cabin particle concentrations , the dusting-holding capacity can meets the needs.
如何在航空过滤器体积、重量有限制,且在大滤速过滤条件下,过滤器能够满足性能要求。 How can the filter performance well when the volume and Weight are limited and the filtration velocity is high.
材料如何满足防火阻燃、大滤速要求 how can the Material meets the needs of fire prevention and high filtration velocity
过滤器结构怎样才能实现抗震 how can the filter structure bear shock
航空过滤器评价方法上如何改进。 The improvement of evaluation methodology for airliner cabin air filter
21
The end !
Thanks for your attention!
22