Abstract
ABSTRACT Aventilation-dilution model has been adapted to determine total and respirable aerosol concentrations in an enclosed calf barn using experimentally determined aerosol generation rates. Respirable aerosol removal mechanisms such as ventilation rate and a supplemental air cleaning device may be evaluated using the model. In a simulated calf barn where 5.8 m^ airspace per calf was allowed, increasing ventilation rates to dilute aerosol concentration was impractical, especially in cold weather. During winter, using a recommended ventilation rate of 0.0045 m^/s per calf, an air cleaner with a removal efficiency of at least 80% and an air recirculation rate of 0.0255 mVs per calf significantly reduced respirable aerosol concentrations.
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