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Titolo:
Sensitivity analysis of the USEPA WINSPM2.5 separator
Autore:
Vanderpool, RW; Peters, TM; Natarajan, S; Tolocka, MP; 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: 465 - 476
SICI:
0278-6826(200105)34:5<465:SAOTUW>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
IMPACTION SURFACES; BOUNCE; DESIGN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
14
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., "Sensitivity analysis of the USEPA WINSPM2.5 separator", AEROS SCI T, 34(5), 2001, pp. 465-476

Abstract

Factors affecting the performance of the USEPA WINS PM2.5 separator have been systematically evaluated. In conjunction with the separator's laboratory calibrated penetration curve, analysis of the governing equation that describes conventional impactor performance was used to predict changes in cutpoint as a function of impactor dimensions, flow rate, uncertainties in ambient temperature and pressure measurement, and the temperature and pressureof the sampled air volume. By integrating the resulting performance curveswith three idealized ambient aerosol size distributions, the effect of these parameters on measured PM2.5 concentration was predicted. Results showedthat allowable variations in impactor jet width, flow rate, diffusion oil volumes, and ambient temperature and pressure measurement result in relatively minimal PM2.5 mass concentration measurement biases. Loading of the WINS well with previously collected particles slightly reduces the separator'scutpoint and thus slightly reduces expected PM2.5 mass concentrations. Variations in ambient pressure produce negligible changes in the performance of the WINS. While not causing a true measurement bias as defined by the regulations, low ambient temperatures naturally affect the airstream's properties and inherently shifts the WINS' cutpoint to slightly lower values. Laboratory-induced crystallization of the DOW 704 diffusion oil produced no appreciable changes in either the position or shape of the WINS separation curve.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 05:12:52