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Max-Eyth-Allee 100

14469 Potsdam


Tel. +49 (0)331 5699-0


Coordinating institute

Barn climate and emissions

Barn model wind tunnel (Photo: ATB)

Contact: Sabrina HempelDavid JankeThomas Amon

The average time to renew the air volume in a barn (air exchange rate) is a characteristic parameter to evaluate barn climate (animal welfare) and emissions (environmental impact). The air exchange rate of mechanically ventilated barns is a defined tuning parameter, while its determination is sophisticated in the case of naturally ventilated buildings. Different air flows in the barn mediate the transport of heat, humidity, pollutant gases and particles (e.g., dust and bioaerosols). The air flow patterns are usually very complex and characterised by a large temporal and spatial variability. Emission sources are diffuse and cover the housing system itself (animal metabolism, manure and urine) as well as manure storage and its application to fields. Procedural influences and features of the atmospheric boundary layer near the ground shape the emission and dispersion processes originating from livestock husbandry.


We study air flow processes in and around facilities for livestock husbandry and the resulting air exchange and emission rates with our three-column-concept:

  • Long-term on-farm measurements

Since 2004 we study meteorological variables (i.e., air velocity, temperature and relative humidity) and concentrations of pollutant gases in a dairy cattle barn in Dummerstorf  in cooperation with the Mecklenburg-Vorpommern State Institute for Agriculture and Fishery. In addition, since 2015 measurements of barn climate are conducted in one of the dairy barns of the Institute for Education and Research in Groß Kreutz.

  • Physical modelling

The large boundary layer wind tunnel is used as an evaluation tool to study air flow patterns and the transport of tracer gases in and around naturally ventilated barns. Effects of barn geometry and inflow direction for typical inflow profiles are investigated in the physical model.

  • Numeric simulation

Computational fluid dynamics (CFD) supports the investigation of the interaction of different drivers in the model (e.g. inflow, temperature gradients) to evaluate their impact on air flow and transport processes in and around facilities for livestock husbandry. Different turbulence parametrisations (RANS & LES models) are applied depending on the particular research question.


By integrating on-farm measurements with data from the boundary layer wind tunnel, comprehensive data sets are generated which, in combination with the numerical models, promote a further development of the technology and management in animal husbandry that combines aspects of animal welfare and environmental protection.


Current research questions

  • Which emission fluxes (at the moment: environmentally harmful and climate relevant gases, soon to be extended to dust and pathogenic particle) originate from livestock husbandry systems? How are they spread into the environment? How can we influence the dispersion?
  • Which air flow patterns and air exchange rates are characteristic for a particular barn? How do outdoor climate, animal activity and barn design influence the through flow? What is the resulting barn climate? How are gases, dust and pathogenic particles spread inside the barn?
  • Which mitigation potentials for pollutant gases and pathogenic particles are available and how can they be efficiently implemented under on-farm conditions?
  • How can the barn climate be optimised using smart ventilation systems?

Program events

May 4, 2020: Virtual Meeting - INI2020 in Berlin (originally scheduled for May 3-7, 2020)

For Covid-19 updates concerning the 8th Global Nitrogen Conference of the International Nitrogen...

Oct 11-12, 2020: Water use assessment of livestock production systems and supply chains, Berlin

The expert-workshop serves to advance and harmonize methods and techniques and improve water use in...

Program news

ATB at IPM 2020 in Essen

Feb 3, 2020: Under the motto "Borders are blurring - an industry in flux", research institutes...

Flugtraining für Landwirte

12. Dez. 2019: Was ist bei der Erstellung von Luftbildern mit Drohnen zu beachten? Welche Software...


Präzises Modell für den optimalen Fruchtbehang

6. Juni 2019: Brandenburgs Agrar- und Umweltstaatssekretärin Dr. Carolin Schilde informierte sich bei ihrem gestrigen Besuch am ATB-Forschungsstandort Marquardt über Ergebnisse des EIP-Agri Projekts...

Projekt SunBot: Autonome Pflegehelfer für das Beerenobst

14. Aug. 2018: Ein autonom fahrender, mit Energie aus Photovoltaik gespeister Traktor soll künftig in Strauchbeerenanlagen gezielt die Pflege des Unterwuchses übernehmen und damit helfen, Ertrag und...

Leibniz-Institut für Agrartechnik und Bioökonomie e.V. · Max-Eyth-Allee 100 · 14469 Potsdam · Germany · Tel. +49 (0)331 5699 0 · E-mail