THE DEVELOPMENT OF A SAMPLING SYSTEM FOR DETERMINING ODOR EMISSION RATES FROM AREAL SURFACES .1. AERODYNAMIC PERFORMANCE

An improved portable odor sampling system (OSS) of the wind tunnel typ e was designed to determine odor emissions from areal sources. The aer odynamics of the odor emission hood was observed using a number of smo ke tests and dry ice tests. The velocity profiles were also measured h orizontally and vertically in the hood by an anemometer. Modifications in the form of an extension inlet duct, flat vanes, and a baffle were necessary to achieve repeatable, uniform, and steady velocity profile s inside the hood. The optimum velocity for use of the OSS was found t o be 0.33 m/s, based upon the aerodynamic performance of the OSS and t he sensitivity of the anemometer at a lower velocity.