Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
권호 표지
DOI QR코드

DOI QR Code

Development of Drying Systems for Accurate Measurement of Particulate Matter by means of Optical Particle Measuring Instruments

광산란 계측기의 미세먼지 측정 정확도 향상을 위한 수분제거 전처리 기술 개발

  • Received : 2018.12.26
  • Accepted : 2018.12.28
  • Published : 2018.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

IIn this study, we have developed drying systems for reducing the error by humidity on measuring particulate matter (PM) in the ambient air with optical particle measuring instruments. Two types of drying systems were designed: drying systems using heating and dilution methods. In addition, 3 types of drying systems using a heating method were designed: Type A (1 hole), B (3 holes) and C (7 holes). After making them, the laboratory and field tests were carried out to evaluate the developed drying systems. As a result, it was shown that the PM concentrations obtained by PM monitoring devices with drying systems agree well with that of the reference devices. Therefore, it could be concluded that the drying systems can be applied to PM monitoring devices for real-time monitoring of the ambient aerosols.

Keywords

KKOSBF_2018_v14n4_191_f0001.png 이미지

Fig. 1. Design of the drying system using a dilution method

KKOSBF_2018_v14n4_191_f0002.png 이미지

Fig. 2. Design of the drying systems using a heating method : (a) A (1 hole), (b) B (3 holes), and (c) C (7 holes)

KKOSBF_2018_v14n4_191_f0003.png 이미지

Fig. 3. Photographs of drying systems using a heating method

KKOSBF_2018_v14n4_191_f0004.png 이미지

Fig. 4. Experimental set-up for performance evaluation of the drying system using dilution method

KKOSBF_2018_v14n4_191_f0005.png 이미지

Fig. 5. Experimental set-up for performance evaluation of the drying system using a heating method

KKOSBF_2018_v14n4_191_f0006.png 이미지

Fig. 6. Simulation of velocity of the drying system using a heating method : (a) 0.5 lpm, (b) 1 lpm

KKOSBF_2018_v14n4_191_f0007.png 이미지

Fig. 7. Performance evaluation of the drying system using a dilution method

KKOSBF_2018_v14n4_191_f0008.png 이미지

Fig. 8. Performance evaluation of the drying system using heating method

KKOSBF_2018_v14n4_191_f0009.png 이미지

Fig. 9. Experimental set-up for a field test

KKOSBF_2018_v14n4_191_f0010.png 이미지

Fig. 10. Comparison of PM10 and PM2.5 between the SENTRY Dust Monitor with a drying system using heating method and a beta ray gauge (Jongno-gu station).

Table 1. Characteristic of drying systems using heating and dilution methods.

KKOSBF_2018_v14n4_191_t0001.png 이미지

Table 2. Specifications of the heater for drying systems

KKOSBF_2018_v14n4_191_t0002.png 이미지

Table 3. Simulation of velocity of the drying system using a heating method

KKOSBF_2018_v14n4_191_t0003.png 이미지

References

  1. Kim, D. S., Cho, Y. K., and Yoon, Y. H. (2014). Development of a real-time monitoring device for measuring particulate matter, Particle and Aerosol Research, 10, 1-8. https://doi.org/10.11629/jpaar.2014.10.1.001
  2. Kang, D. S., Oh, J. E., Lee, S. Y., Shin, H. J., Bong, H. K., and Kim, D. S. (2018). Development and performance evaluation of a real-time PM monitor based on optical scattering method, Particle and Aerosol Research, 14, 107-119.
  3. Kim, J. H., Oh, J., Choi, J. S., Ahn, J. Y., Yoon, G. H., and Park, J. S. (2014). A study on the correction factor of optic scattering PM2.5 by gravimetric method, Journal of the Korean Society of Urban Environment, 14, 41-47.
  4. Branis, M. (2006). The concentration of ambient sources to particulate pollution in spaces and trains of the Prague underground transport system, Atmospheric Environment, 40, 348-356. https://doi.org/10.1016/j.atmosenv.2005.09.060
  5. Day, D. E., Malm, W. C., and Kreidenweis, S. M. (2011). Aerosol light scattering measurements as a function of relative humidity, Journal of the Air & Waste Managements Association, 50, 710-716.
  6. Kim, J. H., Kim, S. W., Heo, J., Nam, J., Kim, M. H., Yu, Y. S., Lim, H. C., Lee, C., Heo, B. H., and Yoon, S. C. (2015). Aerosol light absorption and scattering coefficient measurements with a photoacoustic and nephelometric spectrometer, Atmosphere, Korean Meteorological Society, 25, 185-191.
  7. McMurry, P. H., and Stolzenburg, M. R. (1989). On the sensitivity of particle size to relative humidity for Los Angeles aerosols, Atmospheric Environment, 23, 497-507. https://doi.org/10.1016/0004-6981(89)90593-3
  8. Malm, W. C., Day, D. E., and Kreidenweis, S. M. (2011a). Light scattering characteristics of aerosols as a function of relative humidity: part I-a comparison of measured scattering and aerosol concentrations using the theoretical models, Journal of the Air & Waste Managements Association, 50, 686-700.
  9. Malm, W. C., Day, D. E., and Kreidenweis, S. M. (2011b). Light scattering characteristics of aerosols as a function of relative humidity: part II-a comparison of measured scattering and aerosol concentrations using the statistical models, Journal of the Air & Waste Managements Association, 50, 701-709.