A dynamic chamber method for measuring the smoke, hydrocarbon gas removal, and ordorant emission rate of small ($35-$100) air purifiers has been developed and applied to the evaluation of six different purifiers. The method uses non-steady-state analysis of measurements made with a smoke photometer or a hydrocarbon analyzer to determine the efficiency-volume product, nQr, of the purifier if it removes smokes or gases, or its emission rate if it emits gases rather than removing them.
From theory it is estimated that a purifier should have an nQr > 35 cfm (1 m3/min) to be effective. The purifiers tested had an nQr much less than that.
Emission rates of odorants were found to decrease exponentially with time. The emission rate, S, of all of the purifiers had decreased to below 4.4 x 10–8 lb/min (0.02 mg/min) in 12 days and most of them within about 5 days.
These experiments indicate that the dynamic chamber method is a simple and practical method for evaluating room-size air purifiers.
Product Details
- Published:
- 1983
- Number of Pages:
- 14
- File Size:
- 1 file , 870 KB
- Product Code(s):
- D-DC-2771
- Note:
- This product is unavailable in Russia, Belarus
