DOI QR코드

DOI QR Code

동절기 대향류형 환기장치의 온실 내 습도 조절 효과 분석

Analysis on the Effect of Greenhouse Humidity Control by Counter-flow Ventilator in Winter

  • 이태석 (국립농업과학원 에너지환경공학과) ;
  • 강금춘 (국립농업과학원 에너지환경공학과) ;
  • 장재경 (국립농업과학원 에너지환경공학과) ;
  • 백이 (국립농업과학원 에너지환경공학과) ;
  • 임류갑 (국립농업과학원 에너지환경공학과)
  • Lee, Taeseok (Division of Energy & Envrionmental Emcultural Science, National Institute of Agricultural Sciences) ;
  • Kang, Geumchoon (Division of Energy & Envrionmental Emcultural Science, National Institute of Agricultural Sciences) ;
  • Jang, Jaekyung (Division of Energy & Envrionmental Emcultural Science, National Institute of Agricultural Sciences) ;
  • Paek, Yee (Division of Energy & Envrionmental Emcultural Science, National Institute of Agricultural Sciences) ;
  • Lim, Ryugap (Division of Energy & Envrionmental Emcultural Science, National Institute of Agricultural Sciences)
  • 투고 : 2020.04.17
  • 심사 : 2020.06.20
  • 발행 : 2020.07.30

초록

본 연구에서는 겨울철 보온으로 인해 야간 및 새벽에 상대습도가 높아지는 온실에 대향류형 환기장치를 설치하고 그 효과를 분석하였다. 대향류형 환기장치는 크기 0.96×0.65×0.82(W×D×H, m)의 케이스에 크기 0.54×0.40×0.75(W×D×H, m)의 PE소재의 열교환 소자와 급기와 배기를 위한 송풍팬(풍량 6,800㎥/h, 소비전력1.7kW) 2대가 내부에 있다. 환기장치는 총 2대를 이용하였으며 토마토의 적정 생육 환경을 고려하여 설정 습도를 80%하고 18시부터 익일 8시까지 온실 내 온도 및 습도를 측정하고 분석하였다. 관행 온실에서 야간 평균 온도 및 습도는 14.9℃, 82.8%, 시험구 온실에서 야간 평균 온습도는 15.1℃, 79.9%로 측정되어 온도는 0.1℃, 습도는 약 3% 차이가 났다. 온실 평균 온도 및 습도를 월별로 비교하고 독립표본 t검정을 통해 분석해 본 결과, 유의수준 1%에서 각 월의 온도는 차이가 없는 것으로 나타났으며 습도는 차이가 있다고 판단된다. 따라서 대향류형 환기장치의 사용이 온실의 습도를 관리하고 작물 생육에 적합환 환경을 조성하여 작물 생산성 향상에 도움을 줄 수 있다고 판단된다. 이 외에도 환기장치 사용에 따른 난방비 증가와 같은 손실적 요소와 이익적 요소를 복합적으로 고려한 추가적인 연구도 필요할 것으로 사료된다.

In this study, the humidity control effect of a counter-flow ventilator was analyzed in a greenhouse with high relative humidity at night in the winter season. A case of the counter-flow ventilator was 0.96 × 0.65× 0.82(W × D × H, m) and there were heat transfer element and two fans for air supply and exhaust in the counter-flow ventilator. Two counter-flow ventilators were used in this study and the setting humidity of the ventilators was 80%. The temperature and relative humidity at night(18:00-8:00) in the greenhouse were measured. In a greenhouse without a counter-flow ventilator, the average temperature and humidity was 14.9℃, 82.8%, respectively. When the counter-flow ventilator was operated, the corresponding averages were 15.1℃, 79.9%. The independent sample t test of monthly temperature and relative humidity showed no difference in temperature, and a significant difference in relative humidity with 1% of the significance level. Therefore, using the counter-flow ventilator helps to control relative humidity in greenhouse and increase yield.. And further research considering the pros and cons of using the counter-flow ventilator is needed.

키워드

참고문헌

  1. Euh S.H., J.B. Lee, J.C. Woo, S.M. Kang, and D.H. Kim. 2012. The study on dehumidification for greenhouse with lithiumbromide (LiBr)solution. Journal of Agricultural, Life and Environmental Sciences. 24:24-29 (in Korean).
  2. Kang, G.C., K.S. Yon, Y.S. Ryou, Y.J. Kim, Y. Paek, and Y.K. Kang. 2007. Effects of humidity environmental control in greenhouse using refrigeratory-based dehumidifier. J. Bio-Env. Con. 16:149-153 (in Korean).
  3. Korea Meteorological Administration. 2019. https://data.kma.go.kr/data/gmd/selectAsos RltmList.do?pgmNo=36
  4. Kwon H.J. 2002. Development of CFD model to control humidity in greenhouse. M.S. thesis. Seoul National University (in Korean).
  5. Lee, B.I, W. Moon, and J.I. Son. 2004. The Facility Cultivation. Publishing Department of Korea National Open University (in Korean).
  6. Lee S.Y., C.G. Lee, S.G. Euh, K.C. Oh, J.H. Oh, and D.H. Ki. 2014. Dehumidification and temperature control for green houses using lithium bromide solution and cooling coil. Protected Hort. Plant Fac. 23:337-341 (in Korean). https://doi.org/10.12791/KSBEC.2014.23.4.337
  7. Lim J.H., H.W. Choi, S.T.T. Ha, and B.C. In. 2017. Greenhouse dehumidification extends postharvest longevity of cur roses in winter season. Journal of Horticulture Science and Technology. 35:737-746.
  8. Ministry of Agricultural Food and Rural Affairs (MAFRA). 2019. 2018 Vetgetable Greenhouse Status and Vegetable Production. Sejong, Korea (in Korean).
  9. Nam S.W., K.S. Kim, and G.A. Giacomelli. 2005. Improvement of cooling efficiency in greenhouse fog system using the dehumidifier. J. Bio-Env. Con. 14:29-37 (in Korean).
  10. Seginer, I. and D. Kantz, 1989. Night time use of dehumidifiers in greenhouses. Journal of Agricultural Engineering Research. 44:141-158. https://doi.org/10.1016/S0021-8634(89)80078-2
  11. Yun N.K., M.K. Kim, and S.W. Nam. 1998. Dehumidification and evaporative cooling efficiency by water pipes in greenhouse. J. Bio. Fac. Env. 7:237-245 (in Korean).