DOI QR코드

DOI QR Code

공기막 이중필름의 공기막 두께와 주입공기 온도에 따른 관류전열량 변화 특성

Characteristics of Heat Transmission Variation by Air Space Thickness and Injected Air Temperature in Air-Inflated Double Layers Film

  • 김형권 (국립원예특작과학원 시설원예시험장) ;
  • 전종길 (국립원예특작과학원 시설원예시험장) ;
  • 백이 (국립원예특작과학원 시설원예시험장) ;
  • 이상호 (국립원예특작과학원 시설원예시험장) ;
  • 윤남규 (국립농업과학원 재해예방공학과) ;
  • 유주열 (화신농건)
  • 투고 : 2013.09.17
  • 심사 : 2013.11.04
  • 발행 : 2013.11.30

초록

This study was carried out to provide a valuable reference which could reduce heating loss of air-inflated double PO film. Therefore, this study was aimed to choose the best air space thickness and injected air temperature. The characteristics of heat transmission variation at experimental materials were measured and analysed in the laboratory. The experiment was conducted of two layers of PO film, each 0.15 mm tick, sandwiching 110, 175, 225 mm of inflated air with 1 m sides. Environmental control lab was constantly controlled with $-10^{\circ}C$ and experiment chamber was constantly changed with 0, 5, 10, $15^{\circ}C$. The analysis of heat transfer showed that heat transmission does not have a direct correlation with Air Space thickness and injected air temperature. But when inside and outside temperature difference of chamber was great, supply of outside air to Air Space had an advantage at reduction of heating load. It was required to examine accurate analysis at a real greenhouse.

키워드

참고문헌

  1. Boodley, J. W., 1996. The commercial greenhouse. 2nd ed. Albany, New York: Delmar Publishers.
  2. Fang, W., D. Mears, and A. J. Both, 2007. Story of air-inflated double-layer polyethylene greenhouse and its recent applications in Taiwan. ASAE International Seminar on Agricultural Structures and Agricultural Engineering. National Taiwan University, Taipei, Taiwan, R.O.C.
  3. KRC, 1996. Design standards for greenhouse environment (I). Korea Rural Community Corporation, Ansan (in korean).
  4. Lee, H. W., H. S. Nam, S. Y. Sim, S. W. Nam, and Y. S. Kim, 2009a. Fundamental experiments for design of air inflating apparatus of air-inflated double-layer plastic greenhouse. Journal of the Korean Society of Agricultural Engineers 51 (5): 19-24 (in korean). https://doi.org/10.5389/KSAE.2009.51.5.019
  5. Lee, H. W., S. Y. Sim, H. S. Nam, S. W. Nam, and Y. S. Kim, 2009b. Development of design technology of korean style air-inflated double-layer plastic greenhouse. Journal of Bio-Environment Control 18(3): 185-191 (in Korean).
  6. Lee, H. W., S. Y. Sim, and Y. S. Kim, 2010. Characteristics of PPF transmittance and heat flow by double covering methods of plastic film in tomato greenhouse. Journal of the Korean Society of Agricultural Engineers 52(5): 11-18 (in korean). https://doi.org/10.5389/KSAE.2010.52.5.011
  7. Lee, K. M., J. Y. Oh, J. H. Kim, J. K. Song, K. H. Koo, and K. S. Park, 1999. Environmental control and management automation. Ilil Publishers (in korean).
  8. Lee, S. Y., H. J. Kim, H. Chun, S. H. Yum, and H. J. Lee, 2007. Comparison of heat insulation characteristics of multi-layer thermal screen and development of curtain system. Journal of Bio-Environment Control 16(2): 89-95 (in korean).
  9. Moon, J. P., N. K. Yun, S. H. Lee, H. J. Kim, S. J. Lee, and Y. H. Lee, 2010. Heat loss audit and assessment of the greenhouses using infrared thermal image analysis. Journal of the Korean Society of Agricultural Engineers 52(2): 67-73 (in korean). https://doi.org/10.5389/KSAE.2010.52.2.067
  10. RDA, 2009. Case collection of heat loss audit for agricultural facilities. Rural Development Administration, Suwon (in korean).