Maximising comfort and minimising pollutant exposure in the vehicle cabin using the ventilation system

N. Molden*, Emissions Analytics Ltd., UK

Vehicle thermal management and air conditioning systems play an important role in protecting the driver and passengers from pollution ingress into the vehicle, and from the build-up of carbon dioxide in the cabin. With air pollution in excess of legal limits and World Health Organisation guidelines in many areas across Europe, drivers may be particularly susceptible.

Emissions Analytics has worked in collaboration with National Air Quality Testing Services (NAQTS) and the University of California Riverside to develop a new in-cabin air quality test programme that measures the rate of particle number (down to 15nm in size) ingress into the cabin under different air conditioning and air recirculation modes. In those same scenarios, it also measures the build-up of carbon dioxide and compares it to levels associated with cognitive impairment. Finally, it considers the air replacement rates and therefore the speed with which the air conditioning system can clean up pollutant concentrations in the cabin.

Through this testing, Emissions Analytics will make comparative EQUA Index ratings in order assess the effectiveness of the filtration design components on the vehicle and to compare between vehicles. In this way, it will incentivise the development of the most effective systems and allow optimal choices to be made on the trade-off between pollution ingress and cabin stuffiness.

Furthermore, data from a new EQUA Index programme on in-cabin air quality will be presented, covering the rate of particle infiltration from a range of modern cars, and the propensity of carbon dioxide concentrations to rise when the air recirculation mode is activated.

Session: G2 - Cabin Air Filters
Day: 22 October 2019
Time: 14:45 - 16:00 h

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