냉수배관을 이용한 여름딸기재배의 국소냉방효과 = Spot Cooling effect on Growing Summer Strawberry by using Cold Water Pipe

국문 초록 (Abstract)

여름딸기 고설재배시 고온기에 대한 국소부 냉방효과를 평가하기 위해 강원도 평창 여름딸기 온실에 국소냉난방시스템을 설치하고 적용하였다. 냉수의 온도는 공기대물 히트펌프에 의해 15~20℃.에서 조절되었으며 냉수배관을 근권, 근권과 관부, 관부에 설치하고 세가지 요인으로 시험하였다. 지름이 16mm인 백색연질PE관을 관부에 설치하였으며 근권부에는 같은 크기의 스테인레스 주름관을 설치하였다. 냉수의 순환량은 생장부는 400L/hr 를 순환시켰으며 근권부는 240L/hr 로 8월에 주야간 구분없이 계속 순환시켰다. 효과분석을 위하여 베드별 생산량을 조사하였으며 관부와 근권부를 동시에 냉방한 베드가 대조구에 비해 37% 증가율을 보였고 생장부를 냉방한 베드가 34%, 근권부만을 한 것이 20%의 증가율을 보였다. 근권부 및 관부를 동시에 냉각시킨 베드의 근권부 온도는 17~24℃로 유지되었고 관부의 온도는 18~29℃ 사이에서 유지되었다.

다국어 초록 (Multilingual Abstract)

The effects of spot cooling on growing strawberry in a nutriculture bed during summer by spot cooling system was estimated at the summer strawberry plastic greenhouse in Pyeongchang Gangwondo. The temperature of cooling water was controllded by air to water heat pump and maintained at the range of 15~20℃. Cooling pipes were installed in root zone and put that very close to crown spot. Spot cooling effect was tested in three cases which were cooling root zone, root zone plus crown spot and crown spot only. White low density polyethylene pipe in external diameter of 16mm was installed on crown spot, and Stainless steel flexible pipe in same size was installed in root zone. Crown zone cooling water circulation was continuously performed at a flowrate of 400 L/hr and Root zone was 240L/hr all day long. Strawberry production per bed was surveyed during August. Production increasing rate of root zone plus crown cooling bed was 37% and crown cooling bed was 34% and Root zone cooling bed was 20%. The temperatures of root zone in root zone plus crown cooling bed was maintained at 17.0 ~ 25.0 ℃ and crown spot was maintanied at 18~29℃ during August 2013.