STUDIES ON VOCS REMOVAL RATES OF ROOM AIR CLEANERS AND INDOOR CONCENTRATION PREDICTION

This research determines chemical substance removal rates of domestic air cleaners using with the pollutant constant-emission test. In previous studies, we have already reported the formaldehyde removal rates of room air cleaners and the high accuracy of our method for predicting indoor pollutant concentration. In the present study, the VOCs removal rates of room air cleaners were measured. Gas-phase contaminants were supplied to the environmental test-chamber using a custom-built emission device. And performance evaluation test was conducted to two kinds of air cleaners. When the air cleaner was in operation, there was a marked reduction of VOCs concentration. The results show that the ECAR (or CADR) for ethylbenzene ranged from 57.6 to 210 [m3/h], that for m-xylene ranged from 57.2 to 247 [m3/h], and for styrene ranged from 46.1 to 228 [m3/h]. The correspondence rates between measured and predicted concentrations of ethylbenzene, m-xylene and styrene were 69.7, 71.1 and 66.7 [%], respectively