Journal article
Evaluation of the loading characteristics of the EPA WINS PM2.5 separator: PM2.5 Federal Reference Method Sampler
Aerosol science and technology, Vol.34(5), pp.444-456
2001
DOI: 10.1080/02786820117739
Abstract
The loading characteristics of the USEPA Well Impactor Ninety Six (WINS) PM2.5 separator was ah important design consideration during the separator's development. In recognition that ali inertial separators eventually overload, the loading surface of the WINS was designed to be easily accessible, replaceable, and cleanable. Prior to promulgation of the method, the loading capacity of the WINS separator was evaluated by measuring its performance after repeated loading with laboratory-generated, high concentration, coarse-mode aerosol. For this purpose, a low flow rate loading wind tunnel was designed and constructed to artificially create coarse mode aerosols composed of Arizona Test Dust. This controlled test atmosphere was sampled by the PM2.5 reference method sampling train, as specified in 40 CFR Part 50, Appendix L, at total aerosol mass concentrations averaging 332 μg/m3 for three 24 h periods. The particle size fractionation characteristics of the WINS was evaluated in the laboratory after each 24 h sampling event. These performance curves were integrated with three idealized ambient distributions to yield estimates of bias in measured mass concentration with respect to a clean WINS. Test results served as the basis for establishing the required cleaning frequency of the sampler during field use. Following the method's promulgation, characterization of the WINS performance under conditions of actual feild use at five U.S. cries showed that a maximum mass concentration bias of -2.1% was estimated for 13 wells after the 5 day sampling period. Overall study results supported the current regulation (USEPA 1998) that WINS wells be replaced after every 5 days of 24 h operation.
Details
- Title: Subtitle
- Evaluation of the loading characteristics of the EPA WINS PM2.5 separator: PM2.5 Federal Reference Method Sampler
- Creators
- Robert W Vanderpool - Center for Engineering and Environmental Technology, Research Triangle Institute, Research Triangle Park, North Carolina, United StatesThomas M Peters - Center for Engineering and Environmental Technology, Research Triangle Institute, Research Triangle Park, North Carolina, United StatesSanjay Natarajan - Center for Engineering and Environmental Technology, Research Triangle Institute, Research Triangle Park, North Carolina, United StatesDavid B Gemmill - Atmospheric Methods and Monitoring Branch, National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina, United StatesRussell W Wiener - Atmospheric Methods and Monitoring Branch, National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina, United States
- Resource Type
- Journal article
- Publication Details
- Aerosol science and technology, Vol.34(5), pp.444-456
- DOI
- 10.1080/02786820117739
- ISSN
- 0278-6826
- eISSN
- 1521-7388
- Publisher
- Taylor & Francis
- Language
- English
- Date published
- 2001
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Occupational and Environmental Health
- Record Identifier
- 9984214804902771
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