On-site assessment of the IAQ benefits of an innovative airflow window having an electrostatic particle filter - Université Savoie Mont Blanc Access content directly
Conference Papers Year : 2023

On-site assessment of the IAQ benefits of an innovative airflow window having an electrostatic particle filter

Abstract

In France, 85 % of buildings with mechanical ventilation have an exhaust ventilation system. In such situations, mechanical filtration of the fresh air is hardly possible for technical and practical reasons, which may result in serious IAQ problems in areas with high airborne particle concentrations. An innovative solution coupling an airflow window with an electrostatic precipitator was developed to address this issue. The window allows heat recovery and particle filtration at the fresh air inlet, thus improving IAQ. The electrostatic precipitator uses a needle ionizing technology as a pre-charger combined with a collection stage. The IAQ improvement provided by the system was assessed by comparing particle concentrations in twin rooms of 6 m3 for several weeks. One had the filtering airflow window while the other had a standard airflow window. Particle concentrations were monitored using particle counters for ventilation airflow rates ranging from 10 to 50 m3/h. Ozone and NOx concentrations were also monitored using analyzers to assess the by-product emissions from the ESP. The results showed promising results. For instance, the efficiency is 63 ±5% for PM10 and 79 ±5% for PM1 for an exhaust airflow rate of 40 m3/h, while only 30 m3/h passes through the airflow window in these conditions (10 m3/h is due to infiltrations through the cell envelope). Moreover, the indoor ozone concentration was increased by a maximum of 5 ppb in the test room, when compared to the reference room.
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Dates and versions

hal-04624910 , version 1 (25-06-2024)

Identifiers

  • HAL Id : hal-04624910 , version 1

Cite

Eol Geffre, Benjamin Golly, Evelyne Gonze, Remy Greffet, Pierre Guitton, et al.. On-site assessment of the IAQ benefits of an innovative airflow window having an electrostatic particle filter. 11th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings, May 2023, Tokyo (Japan), Japan. ⟨hal-04624910⟩
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