KOREASCHOLAR

Experimental hot-water heating system was consisted of power supply equipment, a hot water storage tank, circulating pump, fan coil unit and a plastic flexible hose. This heating system was manufactured by an electric heater of a power capacity 6kw/h and light-oil hot air heater in control the heating capacity was 5,000kcal/h. As the result, temperature difference due to hot-water heating system and hot air heater in greenhouse showed that air temperature at experimental greenhouse, and comparison greenhouse were 14.8℃, 13.4℃ respectively. It was found that root-zone temperature of experimental plot and control were 22℃, 15℃. Root-zone temperature in the experimental plot was 7℃ higher than that in control. The inlet-outlet water temperature difference of 2℃ and 3℃ corresponded to the difference of the heat exchange of about 3,132kcal/h, 4,916kcal/h, the heat exchange effciency ranged from 54~88% generally. Under the experimental condition, equation heat change(Y) and correlation could be represented as follows : Y = -282.92ｘ2 + 2963.9ｘ -1688.6, R2 = 0.9081. it is suggested to applicate energy of root-zone warming system where energy from the groundwater is extracted and transferred to the water

Abstract
 1. 서론
 2. 재료 및 방법
 3. 결과 및 고찰
  3.1 시간에 따른 전열온수기 입ㆍ출구온도 변화
  3.2 온실내부 온도변화
  3.3 고설베드 근권부 지온변화
  3.4 팬코일유닛에 의한 난방효과
 4. 결론
 후기
 참고문헌

• 백이(농촌진흥청 국립원예특작과학원 시설원예시험장) | Y. Paek
• 전종길(농촌진흥청 국립원예특작과학원 시설원예시험장) | J. G. Jeon
• 김형권(농촌진흥청 국립원예특작과학원 시설원예시험장) | H. K. Kim
• 윤남규(농촌진흥청 국립농업과학원 농업공학부) | N. K. Yun