Investigation of the emission and immission behaviour of livestock buildings by means of wind tunnel modelling.

The keeping of animals in livestock buildings requires the ventilation of these buildings. Good climate conditions for the animals have to be guaranteed as well as little emissions and immissions from the livestock buildings. An important role for both of these opposite requirements plays the airstream inside and outside of the building. For this reason wind tunnel modelling and digital imaging by using a laser light sheet is applied beside other methods at the Institute of Agricultural Engineering Bornim. The aim of these method is not only to make the flow pattern visible, calculating concentration fields from the frames is also targeted. On the example of cow barns typical ventilation systems are under investigation. Dependent on the shape of the building on self and the specific surrounding the distribution of the air born gaseous emissions in the atmospheric boundary layer is determined and presented. The measurement results will be used to create new guidelines for the specification of minimal distances required between livestock buildings and residential areas.