A5005673205- Air Quality and Health Impacts
- Vehicle emissions and performance
- Advanced Aircraft Design and Technologies
- Air Quality Monitoring and Forecasting
- Air Traffic Management and Optimization
- Infection Control and Ventilation
- Aerosol Filtration and Electrostatic Precipitation
- Electrohydrodynamics and Fluid Dynamics
- Electrostatics and Colloid Interactions
- Biodiesel Production and Applications
- Building Energy and Comfort Optimization
- International Law and Aviation
- Plant Surface Properties and Treatments
- Inhalation and Respiratory Drug Delivery
- Fire Detection and Safety Systems
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Cyclone Separators and Fluid Dynamics
National Institute of Advanced Industrial Science and Technology
2017-2025
As COVID-19 continues to spread, infection risk on public transport is concerning. Air exchange rates (ACH) and advection-diffusion of CO2 particles were determined in a route bus evaluate the risk. ACH increased with speed whether windows open or closed, greater when more open. With two windows, was front rear window than both ventilation fans set exhaust, double that supply. air conditioning (AC) off, spread proportionally at same rate from source, whereas AC on, about half , because might...
A method to determine the cutoff diameter and counting efficiency of single-particle optical particle counters (OPC) is presented. An aerodynamic aerosol classifier (AAC) coupled with an atomizer was used generate monodisperse dioctyl phthalate particles a condensation counter (CPC) as reference instrument. This accurate for capturing OPCs at lower size ranges determining diameter. The CPC found be poor instrument larger than 1 µm in which case inkjet generator (IAG) source Two different...
We conducted field measurements of aerosols near a runway at Narita International Airport (NRT) in February 2018 to characterize the physical and chemical properties aircraft exhaust ultrafine particles (UFPs; diameter <100 nm). An condensation particle counter (UCPC; d50 = 2.5 nm), (CPC; 10 an engine sizer (EEPS; 6.0–523 nm) were used measure number concentrations size distributions ambient air. The sample flow for UCPC CPC was passed through evaporation tube heated (150 °C, 250 or 350 °C)...
Abstract. The characterization of ultrafine particle emissions from jet aircraft equipped with turbofan engines, which are commonly used in civil aviation, is an important issue the assessment impacts aviation on climate and human health. We conducted field observations aerosols carbon dioxide (CO2) near a runway at Narita International Airport, Japan, February 2018. condensation counter (UCPC) (CPC) unheated 350 ∘C heated operation modes to investigate contributions sub-10 nm size ranges...
Abstract The concentration of nanometer-sized particles is frequently measured in terms particle number using well-established measuring instruments, such as condensation counters (CPCs). Traceability for these measurements can be achieved by means calibration against a reference aerosol electrometer starting at concentrations >1000 cm −3 . Here, two independent methods extending traceability down to 1 are described. first method relies on custom-made, optical counter while the second...
Main text This report presents the results of CCQM-P189, a pilot comparison between 10 laboratories which tested participants’ capability to measure particle number concentration (in range 100 20 000 cm -3 ) using condensation counters (CPCs), and charge 0.15 3 fC aerosol electrometers (AEs). Measurements are needed demonstrate compliance vehicle emission legislation becoming increasingly important in other areas such as ambient air workplace monitoring. The measurements typically carried...
A new nebulizer called NanoAerosol Generator (NAG) by Kanomax FMT, Inc. was evaluated experimentally in their performance aerosolizing sub-100 nm particles and sub-10 protein molecules which cannot be aerosolized with conventional compressed-air jet nebulizers due to the interference a number of residue particles. For challenge particles, 29 nm-polystyrene latex (PSL) bovine serum albumin (BSA) were used as test materials, respectively. both aerosolization NAG successful clear separation...
Abstract. Civil aviation is undergoing rapid growth as a result of global economic development. Characterizing ultrafine particle emissions from jet aircraft equipped with turbofan engines, which are commonly used in civil aviation, an important issue for the assessment impacts on climate and human health. Previous studies have reported that number dominated by volatile particles (mainly sulphate organics) mode diameters 10–20 nm non-volatile soot) exhibit ~20–60 nm, depending engine types...
Main text This report presents the results of CCQM-K150, a key comparison between nine National Measurement Institutes (NMIs) which tested capability NMIs to measure particle number concentration (in range 100 20 000 cm -3 ) using condensation counters (CPCs), and charge 0.15 3 fC aerosol electrometers (AEs). Measurements are needed demonstrate compliance vehicle emission legislation becoming increasingly important in other areas such as ambient air workplace monitoring. The measurements...
<div class="section abstract"><div class="htmlview paragraph">This research examined CPC calibration error due to the instability of 10 nm particle. Tandem DMA set-up was used measure actual particle size. Emery oil shrinks by 0.3 after classifier. Residence time in downstream also affects shrinkage with its rate 0.18 per second. In addition, we confirmed 7 more, as anticipated on Kelvin equation. Due this shrinkage, detection efficiency reduced 3% approximately.</div></div>