Performance evalaution of commercial air-cleaning and high-efficiency filter media

摘要

A semi-automated test system has been developed, using standard equipment, for easy and accurate measurement of the collection efficiency and pressure drop of filters for high efficiency and general purpose air cleaning. The possible errors and uncertainties in filter efficiency measurement have been evaluated and minimized through planned system design and operation. Using this system, pressure drop and filter efficiency data for seven commercially available, high-efficiency and ventilation filter media have been obtained. The filter face velocit ywas varied from 2 to 20 cm/s and the particle diameter, from 0.03 to 0.5 mum. At the standard filter face velocity of 10.5 ft/min (5.33 cm/s), the measured filter efficiency was found to range from a low of 9.9