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Current on the Heat Loss in Greenhouses during Winter Season - Case Study Based on Gyeongnam Area -

동절기 온실의 열 손실에 관한 실태조사 - 경남지역을 중심으로 -

  • Im, Jae Un (Graduate school, Gyeongsang National Univ.) ;
  • Yun, Sung Wook (Institute of Agriculture & Life Science, Gyeongsang National University) ;
  • Kim, Hyeon Tae (Dept. of Bio-Industrial Machinery Eng., Gyeongsang National Univ. (Institute of Agriculture and Life Science)) ;
  • Yoon, Yong Cheol (Dept. of Agricultural Eng., Gyeongsang National Univ. (Institute of Agriculture and Life Science, GNU))
  • 임재운 (경상대학학교 대학원) ;
  • 윤성욱 (경상대학교 생업생명과학연구원) ;
  • 김현태 (생물산업기계공학과(농업생명과학연구원)) ;
  • 윤용철 (경상대학교 지역환경기반공학과(농업생명과학연구원))
  • Received : 2013.03.05
  • Accepted : 2013.03.15
  • Published : 2013.03.31

Abstract

An experiment was conducted to study incidences of heat loss in greenhouse in Gyeongnam province using thermal imaging camera in order to determine ways minimizing greenhouse heat loss. Measurements of this work showed that temperature differences between two experiment zones before and after installation of thermal curtains were about $2.0{\sim}3.0^{\circ}C$ and $1.0{\sim}2.0^{\circ}C$ respectively. There was a high correlation between the temperature data measured using a thermal imaging camera and a temperature sensor. There was no serious difference among areas, but between places on the first and second floor with thermal curtains for heat insulation, there was a relatively larger heat loss on the first floor than the second floor. Then in general the greenhouse types had no particular bearing on this matter, there was a relatively large heat loss in the parts of side wall window, the gaps and the parts folded of horizontal thermal curtains, the gutter parts, and the gaps of thermal curtain in the side wall window and facade back side for heat insulation, aren't completely sealed. It was found that there was a substantial heat loss due to infiltration through cracks on covering material, doors, ventilating openings, roof gables and floors, in particular.

본 연구에서는 온실의 열손실을 최소화할 방안을 모색하기 위하여 경남지역에 있는 시설 농가를 대상으로 열화상 카메라를 이용하여 열손실 사례에 대한 실태조사를 실시하였다. 그 결과를 요약하면 다음과 같다. 치마처리 전 후의 두 실험구간의 온도차는 각각 $2.0{\sim}3.0^{\circ}C$$1.0{\sim}2.0^{\circ}C$ 정도인 것을 알 수 있다. 열화상 기기에 의해 계측된 온도와 온도 센서에 의해 계측된 온도와는 상관 관계가 큰 것으로 나타났다. 실태조사 지역 간에 큰 차이는 없었지만 보온용 부직포가 1층인 경우와 2층인 경우를 보면, 1층이 2층에 비해 상대적으로 열손실 크게 나타났다. 그리고 전체적으로 온실의 형태와 무관하게 측장부분과 수평보온커튼의 틈새, 측면과 전 후면 보온용 부직포의 이음부분이 완전히 밀폐되지 않아 열손실이 상대적으로 큰 것으로 나타났다. 특히, 파손된 피복재나 출입문, 환기구, 박공, 바닥부근 등에서 틈새가 생겨서 많은 양의 열이 손실되고 있었다.

Keywords

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