This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Real-Driving Measurement of Vehicle Interior Air Quality and Cabin Air Filtering Performance by Using Low-Cost Sensors
- Yingying Cha - CabinAir Sweden AB, Sweden ,
- Chunyang Yin - Tsinghua University, School of Environment, China ,
- Jiee Du - CabinAir Tech (Shenzhen) Co., Ltd., China ,
- Tian Xia - CabinAir Tech (Shenzhen) Co., Ltd., China ,
- Wei An - CabinAir Sweden AB, Sweden ,
- Shaojun Zhang - Tsinghua University, School of Environment, China
Journal Article
02-15-04-0020
ISSN: 1946-391X, e-ISSN: 1946-3928
Sector:
Citation:
Cha, Y., Yin, C., Du, J., Xia, T. et al., "Real-Driving Measurement of Vehicle Interior Air Quality and Cabin Air Filtering Performance by Using Low-Cost Sensors," SAE Int. J. Commer. Veh. 15(4):323-335, 2022, https://doi.org/10.4271/02-15-04-0020.
Language:
English
Abstract:
Vehicle interior air quality is usually determined by the levels of in-cabin air
pollutants, such as particulate matter (PM), gaseous air pollution (volatile
organic compounds [VOCs], oxides of nitrogen [NOx], and carbon monoxide [CO]),
and carbon dioxide [CO2], which reflect the freshness of indoor air.
Nowadays, cabin air filters play a key role in preventing outdoor air pollutants
transporting inside vehicles; hence, in-cabin air quality can be strongly
associated with the filtration performance of cabin air cleaning solutions.
However, challenges are existing in a standard method for assessing the
performance of a cabin air filter in real-life driving conditions. This study is
to develop a low-cost mobile test method for monitoring in-vehicle PM and
CO2 and evaluating the performances of cabin air filters while
driving the vehicles. The results reveal that certain boundary conditions are
important to have a proper method for evaluating the particle removal
efficiency. For example, recirculation ventilation can lead to high
PM2.5 removal efficiency regardless of the status and performance
of a cabin air filter, and the remarkable increase in CO2 in a short
time is an obvious indicator of the activation of recirculation. Fresh air
ventilation is effective in maintaining the in-cabin freshness without the
built-up of interior CO2; however, drivers can be exposed to a high
level of PM2.5 concentrations with cabin air filters of poor
performance. For the vehicles involved in this study, the average
PM2.5 removal efficiencies were about 17-50% under fresh air with
existing installed cabin air filters (more than 3 months since installed). With
a brand-new filter (original cabin air filter and CabinAir Nordzoneā¢ filter),
the vehicle could filter out about 80-86% of outdoor PM2.5. The
application of ionization technology together with the Nordzoneā¢ filter was
proven to further enhance the PM2.5 removal efficiency by up to 97%.
Future work would be of great interest to investigate the aging performance of
those optimized cabin air filters and the contribution of ionization, as a
promising technology to improve the performance of cabin air filters, on those
aged filters in real-driving environments.