Compartmental airflow simulation in stables with natural ventilation

The assessment of air volume flow rates is important in estimating the environmental impact of airborne emissions from stables. In contrast to mechanically ventilated stables the amount of air exchange is variable in open stables and depends on the wind velocity and wind direction. Statistics on the emission mass flow of naturally ventilated stables are not available, improvements for analysing the measured data are necessary. This work shows a new method to overcome these disadvantages. The used calculation method is applied in the medical area since some decades but for the first time in agriculture to calculate the air volume flow. The method of compartmentalisation increases the quality of air flow calculation measurements and gives the possibility to check the results of other techniques. This allows to define and decrease the error level.