Performance study of a disk-to-disk thermal precipitator

Bin Wang, Qisheng Ou, Shu Tao, Da Ren Chen

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In this study, the performance of a thermal precipitator of the disk-to-disk type was investigated experimentally and numerically. The prototype precipitator was basically two disks separated via a circular Teflon® spacer. The temperatures of the two disks (one at elevated temperature and the other at room temperature) were individually controlled by a silicone heating element and running water at room temperature. Monodisperse particles of sodium chloride and fluorescein sodium were used to investigate the particle collection efficiency of the precipitator when operated under various aerosol flowrates and temperature gradients. Our experimental data showed that the particle collection efficiency of the precipitator remained approximately constant for test particles with diameters smaller than 300nm and noticeably decreased as the particle diameter increased beyond 300nm. A numerical model was developed and showed that the calculated particle collection efficiency was in reasonable agreement with experiment observations. Finally, a simple model was developed to estimate the particle collection efficiency of a typical disk-to-disk thermal precipitator. The model indicated that the particle collection efficiency of a disk-to-disk precipitator is a function of cold-disk deposition area, the average thermophoretic velocity, and the aerosol flowrate. This model may be useful in the future design of a thermal precipitator with the similar configurations.

Original languageEnglish (US)
Pages (from-to)45-56
Number of pages12
JournalJournal of Aerosol Science
Volume52
DOIs
StatePublished - Jan 1 2012

Fingerprint

Aerosols
Electric heating elements
Temperature
Polytetrafluoroethylene
Silicones
Sodium chloride
Fluorescein
Polytetrafluoroethylenes
Sodium Chloride
temperature
Thermal gradients
aerosol
Numerical models
Sodium
Hot Temperature
particle
sodium chloride
temperature gradient
Water
sodium

Keywords

  • Disk-to-disk thermal precipitator
  • Particle collection efficiency
  • Thermophoresis
  • Ultrafine particle sampler

Cite this

Performance study of a disk-to-disk thermal precipitator. / Wang, Bin; Ou, Qisheng; Tao, Shu; Chen, Da Ren.

In: Journal of Aerosol Science, Vol. 52, 01.01.2012, p. 45-56.

Research output: Contribution to journalArticle

Wang, Bin ; Ou, Qisheng ; Tao, Shu ; Chen, Da Ren. / Performance study of a disk-to-disk thermal precipitator. In: Journal of Aerosol Science. 2012 ; Vol. 52. pp. 45-56.
@article{825fab2b7b094c8691ca4eab152263f3,
title = "Performance study of a disk-to-disk thermal precipitator",
abstract = "In this study, the performance of a thermal precipitator of the disk-to-disk type was investigated experimentally and numerically. The prototype precipitator was basically two disks separated via a circular Teflon{\circledR} spacer. The temperatures of the two disks (one at elevated temperature and the other at room temperature) were individually controlled by a silicone heating element and running water at room temperature. Monodisperse particles of sodium chloride and fluorescein sodium were used to investigate the particle collection efficiency of the precipitator when operated under various aerosol flowrates and temperature gradients. Our experimental data showed that the particle collection efficiency of the precipitator remained approximately constant for test particles with diameters smaller than 300nm and noticeably decreased as the particle diameter increased beyond 300nm. A numerical model was developed and showed that the calculated particle collection efficiency was in reasonable agreement with experiment observations. Finally, a simple model was developed to estimate the particle collection efficiency of a typical disk-to-disk thermal precipitator. The model indicated that the particle collection efficiency of a disk-to-disk precipitator is a function of cold-disk deposition area, the average thermophoretic velocity, and the aerosol flowrate. This model may be useful in the future design of a thermal precipitator with the similar configurations.",
keywords = "Disk-to-disk thermal precipitator, Particle collection efficiency, Thermophoresis, Ultrafine particle sampler",
author = "Bin Wang and Qisheng Ou and Shu Tao and Chen, {Da Ren}",
year = "2012",
month = "1",
day = "1",
doi = "10.1016/j.jaerosci.2012.04.004",
language = "English (US)",
volume = "52",
pages = "45--56",
journal = "Journal of Aerosol Science",
issn = "0021-8502",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Performance study of a disk-to-disk thermal precipitator

AU - Wang, Bin

AU - Ou, Qisheng

AU - Tao, Shu

AU - Chen, Da Ren

PY - 2012/1/1

Y1 - 2012/1/1

N2 - In this study, the performance of a thermal precipitator of the disk-to-disk type was investigated experimentally and numerically. The prototype precipitator was basically two disks separated via a circular Teflon® spacer. The temperatures of the two disks (one at elevated temperature and the other at room temperature) were individually controlled by a silicone heating element and running water at room temperature. Monodisperse particles of sodium chloride and fluorescein sodium were used to investigate the particle collection efficiency of the precipitator when operated under various aerosol flowrates and temperature gradients. Our experimental data showed that the particle collection efficiency of the precipitator remained approximately constant for test particles with diameters smaller than 300nm and noticeably decreased as the particle diameter increased beyond 300nm. A numerical model was developed and showed that the calculated particle collection efficiency was in reasonable agreement with experiment observations. Finally, a simple model was developed to estimate the particle collection efficiency of a typical disk-to-disk thermal precipitator. The model indicated that the particle collection efficiency of a disk-to-disk precipitator is a function of cold-disk deposition area, the average thermophoretic velocity, and the aerosol flowrate. This model may be useful in the future design of a thermal precipitator with the similar configurations.

AB - In this study, the performance of a thermal precipitator of the disk-to-disk type was investigated experimentally and numerically. The prototype precipitator was basically two disks separated via a circular Teflon® spacer. The temperatures of the two disks (one at elevated temperature and the other at room temperature) were individually controlled by a silicone heating element and running water at room temperature. Monodisperse particles of sodium chloride and fluorescein sodium were used to investigate the particle collection efficiency of the precipitator when operated under various aerosol flowrates and temperature gradients. Our experimental data showed that the particle collection efficiency of the precipitator remained approximately constant for test particles with diameters smaller than 300nm and noticeably decreased as the particle diameter increased beyond 300nm. A numerical model was developed and showed that the calculated particle collection efficiency was in reasonable agreement with experiment observations. Finally, a simple model was developed to estimate the particle collection efficiency of a typical disk-to-disk thermal precipitator. The model indicated that the particle collection efficiency of a disk-to-disk precipitator is a function of cold-disk deposition area, the average thermophoretic velocity, and the aerosol flowrate. This model may be useful in the future design of a thermal precipitator with the similar configurations.

KW - Disk-to-disk thermal precipitator

KW - Particle collection efficiency

KW - Thermophoresis

KW - Ultrafine particle sampler

UR - http://www.scopus.com/inward/record.url?scp=84862171076&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862171076&partnerID=8YFLogxK

U2 - 10.1016/j.jaerosci.2012.04.004

DO - 10.1016/j.jaerosci.2012.04.004

M3 - Article

AN - SCOPUS:84862171076

VL - 52

SP - 45

EP - 56

JO - Journal of Aerosol Science

JF - Journal of Aerosol Science

SN - 0021-8502

ER -