Vehicle cabin air quality: influence of air recirculation on energy use, particles, and CO.

In this study, simulations were performed to investigate the influence of different vehicle climate ventilation strategies, mainly the air recirculation (REC) degree, on the cabin air quality and climate system power. The focus of air quality is on the cabin particle concentrations including PM (particles of aerodynamic diameter less than 2.5 μm), UFP (ultrafine particles of aerodynamic diameter less than 100 nm), and cabin CO concentration.

Size-resolved simulation of particulate matters and CO concentration in passenger vehicle cabins.

The main aim of this study is to develop a mathematical size-dependent vehicle cabin model for particulate matter concentration including PM (particles of aerodynamic diameter less than 2.5 μm) and UFPs (ultrafine particles of aerodynamic diameter less than 100 nm), as well as CO concentration. The ventilation airflow rate and cabin volume parameters are defined from a previously developed vehicle model for climate system design.

PM and ultrafine particles in passenger car cabins in Sweden and northern China-the influence of filter age and pre-ionization.

The main aim of the study was to evaluate the influence of filter status (new and aged), pre-ionization, on the particle filtration in modern passenger cars. Measurements of in-cabin and outside PM (dp < 2.5 μm) concentration and UFP (ultrafine particle, dp < 100 nm) counts, to calculate I/O (indoor to outdoor) ratios, were performed.