Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Effect of Slot Discharge-Angle Change on Exhaust Efficiency of Range Hood System with Air Curtain

에어커튼형 레인지후드의 슬롯 토출 각도 변화와 배기 효율

  • Sung, Sun-Kyung (Department of Building Mechanical System and Fire Protection Engineering)
  • 성순경 (가천대학교 설비소방공학과)
  • Received : 2015.04.17
  • Accepted : 2015.06.03
  • Published : 2015.09.10
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Abstract

When oil is used for cooking in detached or apartment houses, large amounts of oil-mist, smoke, and particulate substances are generated and dispersed into the indoor-air environment. These pollutants diffuse into the surroundings and spread their odor while rising fast at a high temperature due to the heat energy from the gas range. Although the exhaust gas is discharged from the exhaust hood, which is installed on the top of a gas range to remove the diffuse pollutants, the exhaust conditions can vary greatly because they depend on the shape of the exhaust hood and the discharge rate. In this paper, the air that is required for the gas-exhaustion process is supplied by an air curtain that surrounds the kitchen hood, and the pollutant-capturing efficiency varies depending on the angle of the discharge grills; the pollutant-capturing efficiency was studied using a numerical-analysis method. The results indicate that the pollutant-capturing efficiency is not significantly changed by a change of the discharge-grill angle at a low air-discharge rate; however, at a high air-discharge rate, the efficiency value increases with an increase of the discharge-grill angle, whereby the best value occurs at 30 degrees and the efficiency decreases above this angle. Below 30 degrees, the effect of the discharge rate on the capturing efficiency is more than that of the discharge-grill angle.

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References

  1. Shon, B. S., Park, J. A., Park, S. C., and Kim, M. C., 2001, Industrial Ventilation, Dong Hwa Technology, pp. 104-105.
  2. Sung, S. K., 2014, Exhaust Characteristics of Kitchen Hood System with Inclined Air Curtain, Korean Journal of Air-Conditioning and Refrigeration, Vol. 26, No. 12, pp. 594-599. https://doi.org/10.6110/KJACR.2014.26.12.594
  3. Lim, K. B., Lee, K. S., and Lee, C. H., 2006, A Numerical Study on the Flow Characteristics of Kitchen Hood System, Korean Journal of Air-Conditioning and Refrigeration, Vol. 18, No. 4, pp. 359-369.
  4. Kim, B. G., Choi, H. G., Yong, H. T., and Lee, M. H., 2005, Horizontal Air-Jet Effect on the Natural Convection around a Range-Hood System, Korean Journal of Air-Conditioning and Refrigeration, Vol. 17, No. 4, pp. 333-340.
  5. Park, M. S., Lee, D. W., Kim, J. Y., and Lee, S. H., 2003, Experimental Study on Capture Efficiency of Kitchen Hood with Lower Make-up Air Supply Equipment, Proceedings of Sarek Summer Conference, pp. 1368-1372.
  6. Sohn, D. Y., Lim, J. H., Choi, Y. H., and Park, J. H., 2007, A Numerical Study on the Performance Improvement of Kitchen Range Hood by Air Inducrion and Air Curtain, Korean Journal of Air-Conditioning and Refrigeration, Vol. 19, No. 4, pp. 321-327.
  7. Koo, N. Y., Lee, Y. K., and Yong, Y. S., 2002, An Experimental Study on the air curtain range hood interrupting the diffusion of polluted air, Proceedings of SAREK Conference. pp. 382-387.
  8. Hayes, F. C. and Stoecker, W. F., 1969, Design data for air curtains, ASHRAE Transactons, Vol. 75, pp. 168-179.
  9. Yuguo Li and Angelo Delsante, 1996, Derivation of Capture Efficiency of Kitchen Range Hoods in a Confined Space, Building and Environment, Vol. 31, No. 5, pp. 461-468. https://doi.org/10.1016/0360-1323(96)00006-6

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  1. Recent Progress in Air-Conditioning and Refrigeration Research : A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2015 vol.28, pp.6, 2016, https://doi.org/10.6110/KJACR.2016.28.6.256