Publikationsdatenbank

Airflow characteristics downwind a naturally ventilated pig building with a roofed outdoor exercise yard and implications on pollutant distribution (2020)

Art

Zeitschriftenartikel / wissenschaftlicher Beitrag

Autoren

Yi, Qianying

Janke, David

Thormann, Lars

Zhang, Guoqiang

Amon, Barbara

Hempel, Sabrina

Nosek, Štepán

Hartung, Eberhard

Amon, Thomas (WE 10)

Quelle

Applied Sciences : open access journal

Bandzählung: 10

Heftzählung: 14

Seiten: Artikel 4931

ISSN: 2076-3417

Sprache

Englisch

Verweise

URL (Volltext): https://www.mdpi.com/2076-3417/10/14/4931

DOI: 10.3390/app10144931

Kontakt

Institut für Tier- und Umwelthygiene

Robert-von-Ostertag-Str. 7-13
14169 Berlin
+49 30 838 51845
tierhygiene@vetmed.fu-berlin.de

Abstract / Zusammenfassung

The application of naturally ventilated pig buildings (NVPBs) with outdoor exercise yards is on the rise mainly due to animal welfare considerations, while the issue of emissions from the buildings to the surrounding environment is important. Since air pollutants are mainly transported by airflow, the knowledge on the airflow characteristics downwind the building is required. The objective of this research was to investigate airflow properties downwind of a NVPB with a roofed outdoor exercise yard for roof slopes of 5°, 15°, and 25°. Air velocities downwind a 1:50 scaled NVPB model were measured using a Laser Doppler Anemometer in a large boundary layer wind tunnel. A region with reduced mean air velocities was found along the downwind side of the building with a distance up to 0.5 m (i.e., 3.8 times building height), in which the emission concentration might be high. Additional air pollutant treatment technologies applied in this region might contribute to emission mitigation effectively. Furthermore, a wake zone with air recirculation was observed in this area. A smaller roof slope (i.e., 5° slope) resulted in a higher and shorter wake zone and thus a shorter air pollutant dispersion distance.