Theoretical Threshold for Estimating the Impact of Ventilation on Materials’ Emissions
Artikel i vetenskaplig tidskrift, 2024

In new buildings, nonoccupant VOC emissions are initially high but typically decrease within months. Increased ventilation is commonly used to improve indoor air quality, assuming it speeds up VOC off-gassing from materials. However, previous research presents inconsistent results. This review introduces a simplified analytical model to understand the ventilation-emission relationship. By combining factors such as diffusivity, emitting area, and time, the model suggests the existence of a theoretical ventilation threshold beyond which enhanced ventilation has no further influence on emission rates. A threshold of approximately 0.13 L s-1 m-2 emitting area has been found for various VOCs documented in the existing literature, with which the conflicting results are explained. It is also shown that the threshold remains notably consistent across different boundary conditions and model resolutions, indicating its suitability for real-world applications.

ventilation

emission rate

VOC

indoor air quality

off-gassing

material emission

Författare

Fredrik Domhagen

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Sarka Langer

Chalmers, Arkitektur och samhällsbyggnadsteknik, Installationsteknik

IVL Svenska Miljöinstitutet

Angela Sasic Kalagasidis

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Journal of Environmental Science and Technology

0013936x (ISSN) 15205851 (eISSN)

Vol. 58 11 5058-5067

VOC-pass. En metodik för proaktiv och energieffektiv ventialation av tidiga VOC i byggnader

Energimyndigheten (P2021-00173), 2021-12-01 -- 2023-12-29.

Ämneskategorier

Miljöanalys och bygginformationsteknik

DOI

10.1021/acs.est.3c09815

PubMed

38445590

Mer information

Senast uppdaterat

2024-04-02