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

Taeseok Lee; Geumchoon Kang; Jaekyung Jang; Yee Paek; Ryugap Lim

doi:10.12791/KSBEC.2020.29.3.259

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2020 Vol.29, Issue 3 Preview Page Next Page

Original Articles

Analysis on the Effect of Greenhouse Humidity Controlby Counter-flow Ventilator in Winter 동절기 대향류형 환기장치의 온실 내 습도 조절 효과 분석

31 July 2020. pp. 259-264

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Abstract

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°C, 82.8%, respectively. When the counter-flow ventilator was operated, the corresponding averages were 15.1°C, 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.

Keywords

Air temperature

Environment

Ventilation

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 6,800m³/h, 소비전력 1.7kW) 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.

키워드

온도

환경

환기

References

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Information

Publisher :The Korean Society for Bio-Environment Control
Publisher(Ko) :(사)한국생물환경조절학회
Journal Title :Protected Horticulture and Plant Factory
Journal Title(Ko) :시설원예ㆍ식물공장
Volume : 29
No :3
Pages :259-264
Received Date : 2020-04-17
Revised Date : 2020-06-18
Accepted Date : 2020-06-20
DOI :https://doi.org/10.12791/KSBEC.2020.29.3.259

Journal of Bio-Environment Control ISSN:1229-4675(Print) 2765-3641(Online) 생물환경조절학회지

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Literature Cited