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Titolo:
Evaluation of the loading characteristics of the EPA WINSPM2.5 separator
Autore:
Vanderpool, RW; Peters, TM; Natarajan, S; Gemmill, DB; Wiener, RW;
Indirizzi:
Res Triangle Inst, Ctr Engn & Environm Technol, Res Triangle Pk, NC 27709 USA Res Triangle Inst Res Triangle Pk NC USA 27709 Triangle Pk, NC 27709 USA US EPA, Natl Exposure Res Lab, Atmospher Methods & Monitoring Branch, Res Triangle Pk, NC 27711 USA US EPA Res Triangle Pk NC USA 27711 Branch, Res Triangle Pk, NC 27711 USA
Titolo Testata:
AEROSOL SCIENCE AND TECHNOLOGY
fascicolo: 5, volume: 34, anno: 2001,
pagine: 444 - 456
SICI:
0278-6826(200105)34:5<444:EOTLCO>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
IMPACTION SURFACES; COLLECTION CHARACTERISTICS; PARTICLES; AEROSOL; SAMPLERS; BOUNCE; DESIGN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Vanderpool, RW Res Triangle Inst, Ctr Engn & Environm Technol, POB 12194,Bay 4,Bldg 11, Res Triangle Pk, NC 27709 USA Res Triangle Inst POB 12194,Bay4,Bldg 11 Res Triangle Pk NC USA 27709
Citazione:
R.W. Vanderpool et al., "Evaluation of the loading characteristics of the EPA WINSPM2.5 separator", AEROS SCI T, 34(5), 2001, pp. 444-456

Abstract

The loading characteristics of the USEPA Well Impactor Ninety Six (WINS) PM2.5 separator was an important design consideration during the separator'sdevelopment. In recognition that all 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 loadingcapacity 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 mug/m(3) 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 aclean WINS. Test results served as the basis for establishing the requiredcleaning frequency of the sampler during field use. Following the method'spromulgation, characterization of the WINS performance under conditions ofactual field use at five U.S. cities 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) thatWINS wells be replaced after every 5 days of 24 h operation.

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Documento generato il 05/07/20 alle ore 08:47:54