Analysis of the Insulation Effectiveness of the Thermal Insulator by the Installation Methods

보온단열재의 설치방법에 따른 보온성 효과 분석

  • 김영복 (경상대학교 농업생명과학대학 생물산업기계공학과, 농업생명과학연구원) ;
  • 이시영 (농촌진흥청 원예연구소 시설원예시험장) ;
  • 정병룡 (경상대학교 농업생명과학대학 농생명학부 원예학, 농업생명과학연구원)
  • Published : 2009.12.31

Abstract

In this study, the thermal insulation effectiveness of the greenhouse insulators by the installation methods was investigated to find the right installation way of the insulation materials. Physical properties of the insulators such as thickness, air transmissivity, apparent density, ultraviolet rays cutoff ratio, reflectance, thermal conductivity, moisture absorptivity were evaluated and the insulation ability of the insulators were measured by the module experiments. For the same insulator, the insulation ability of the case with the outward direction of the black colored face, i.e., with the inward direction of the white colored face, was better than that of vice versa. The case of the black colored both surfaces was better than the case of the white colored both surfaces. For aluminium reflection material, the case with the outward direction of the lustre face, i.e., with the inward direction of the non-lustre face, was better than that of vice versa. For the same material with the inner thin polyethylene foam (or polyester) and the chemical wool, the case with the outward direction of the inner thin polyethylene foam (or polyester), i.e., with the inward chemical wool, was better than that of vice versa. Addition of the inner thin polyethylene foam increased the insulation effect very much.

References

  1. Chang, Y.S., K.Y. Oh, S.H. Kim, J.G. Jeun, K.C. Kang, and D.H. Chyong. 1996. Study on the physical properties of the greenhouse thermal curtains. Journal of Bio-Environment Control 5(1):34-42 (in Korean)
  2. Kim, Y.B. 2000. Bio-systems simulation. Gyeongsang national University Press (in Korean)
  3. Kim, Y.B., J.C. Park, M.R. Huh., S.Y. Lee, and S.W. Jeong. 2007. Effectiveness of the aluminum thermal screens depending on the allocation type. Journal of Bio-Environment Control. 16(4):284-290 (in Korean)
  4. Ko, K.D. 2009. Insulation effectiveness depending on the greenhouse insulation methods. RDA. http://blog.naver.com/hyjjung?Redirect=Log&logNo=140066786847(in Korean)
  5. Kwon, J.K., J.H. Lee, N.J. Kang, K.H. Kang, and Y.H. Choi. 2004. Effectiveness study on the insulation effect and yields of tomato depending on the thermal insulator materials and methods of the plastic house. Journal of Bio-Environment Control 13(4):251-257 (in Korean)
  6. Lee, S.Y. 2003. Study on the thermal insulation effectiveness and installation method depending on the thermal curtains. RDA (in Korean)
  7. Pitam Chandra and L.D. Albright. 1989. Analytical determination of the effect on greenhouse heating requirements of using night curtains. TRANSACTIONS of the ASAE 23(4):994-1000
  8. RDA. 2005. The principle and application of the Agricultural energy technology (in Korean)