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Analysis of Heat Transfer Characteristics on Multi-layer Insulating Curtains Coated with Silica Aerogel

실리카 에어로겔이 흡착된 다겹보온커튼의 전열 특성 분석

  • Jin, Byung-Ok (Dept. of Agricultural Engineering, National Institute of Agricultural Science, RDA) ;
  • Kim, Hyung-Kweon (Dept. of Agricultural Engineering, National Institute of Agricultural Science, RDA) ;
  • Ryou, Young-Sun (Dept. of Agricultural Engineering, National Institute of Agricultural Science, RDA) ;
  • Lee, Tae-Seok (Dept. of Agricultural Engineering, National Institute of Agricultural Science, RDA) ;
  • Kim, Young-Hwa (Dept. of Agricultural Engineering, National Institute of Agricultural Science, RDA) ;
  • Oh, Sung-Sik (Dept. of Agricultural Engineering, National Institute of Agricultural Science, RDA) ;
  • Kang, Geum-Choon (Dept. of Agricultural Engineering, National Institute of Agricultural Science, RDA)
  • 진병옥 (국립농업과학원 농업공학부) ;
  • 김형권 (국립농업과학원 농업공학부) ;
  • 유영선 (국립농업과학원 농업공학부) ;
  • 이태석 (국립농업과학원 농업공학부) ;
  • 김영화 (국립농업과학원 농업공학부) ;
  • 오성식 (국립농업과학원 농업공학부) ;
  • 강금춘 (국립농업과학원 농업공학부)
  • Received : 2019.06.10
  • Accepted : 2019.07.12
  • Published : 2019.07.30

Abstract

The multi-layer insulating curtains used in the experiment was produced in six combinations using non-woven fabric containing aerogel and compared and analyzed by measuring heat flux and heat perfusion rates due to weight, thickness and temperature changes. Using silica aerogel, which have recently been noted as new material insulation, this study tries to produce a new combination of multi-layer insulating curtains that can complement the shortcomings of the multi-layer insulating curtains currently in use and maintain and improve its warmth, and analyze the thermal properties. The heat flux means the amount of heat passing per unit time per unit area, and the higher the value, the more heat passing through the multi-layer insulating curtain, and it can be judged that the heat retention is low. The weight and thickness of multi-layer insulation curtains were found to be highly correlated with thermal insulation. In particular, insulation curtains combined with aerogel meltblown non-woven fabric had relatively higher thermal insulation than insulation curtains with the same number of insulation materials. However, the aerogel meltblown non-woven fabric is weak in light resistance and durability, and there is a problem that the production process and aerogel are scattering. In order to solve this problems, the combination of expanded aerogel non-woven fabric and hollow fiber non-woven fabric, which are relatively simple manufacturing processes and excellent warmth, are suitable for use in real farms.

본 연구는 최근 신소재 단열재로 주목받고 있는 실리카 에어로겔을 이용하여 현재 사용되고 있는 다겹보온커튼의 단점을 보완하고 보온성을 유지 및 향상 시킬 수 있는 새로운 조합의 다겹보온커튼을 제작 하고, 보온 특성을 분석하고자 한다. 실험에 사용된 다겹보온커튼은 에어로겔이 함유된 부직포를 사용하여 총 6가지의 조합으로 제작하였으며 중량, 두께 및 온도변화에 따른 열유속을 측정하여 비교분석하였다. 실험결과 조합별 보온커튼의 열유속은 마트지+에어로겔 멜트블로운+발포 에어로겔 부직포+에어로겔 멜트블로운+마트지 조합이 가장 낮게 측정되었다. 열유속은 단위면적당 단위시간에 통과하는 열량을 뜻하며 수치가 높을수록 다겹보온커튼을 통과하는 열량이 많다는 것을 의미하여 보온성이 낮다고 판단할 수 있다. 조합형 보온커튼의 무게와 두께는 보온성과 상관이 높은 것으로 나타났으며, 특히 에어로겔 멜트블로운 부직포가 조합된 보온커튼이 같은 매수의 단열재가 조합된 보온커튼에 비해 보온성이 상대적으로 높게 나타났다. 하지만 에어로겔 멜트블로운 부직포는 내광성과 내구성이 약하고, 까다로운 제작공정과 에어로겔이 비산하는 문제점이 있다. 이러한 문제점을 해결하기 위하여 비교적 제작공정이 단순하고 보온성이 우수한 중공사 부직포와 에어로겔 발포 부직포를 조합한 다겹보온커튼이 실제 농가에서 사용하기에 적합하다고 판단된다.

Keywords

References

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