This study is nutrient heating effect to apply the surplus heat recovery in greenhouse using fan coil unit. Especially, this study was carried out to utilize a surplus heat in greenhouse. This fan coil unit system was composed of a water tank, a fan coil unit, a circulating pump and a water-water heat exchanger. As the result, Temperature difference duing to fan coil unit in greenhouse showed that air temperature at experimental greenhouse on fan , comparison greenhouse were 28.3℃, 33.9℃, respectively. heat ratio showed that exchanged energy quantity in fan coil unit was 19,900∼28,880kcal/h, respectively. It was found that difference of nutrient temperature due to surplus heat recovery, water tank temperature were 19.2∼21.5℃ and 16.2∼18.3℃, The temperature variation of nutrient temperature was about 3℃ and higher . Economic analysis of fan coil unit system was increased gross income cost by 804,787 won.

Abstract
 1. 서론
 2. 재료 및 방법
 3. 결과 및 고찰
  3.1 팬코일 유닛 가동에 따른 온실내부의 온도변화
  3.2 팬코일 유닛의 가동에 따른 양액탱크내의 온도변화
  3.3 시간 및 온도차이에 따른 열교환량
  3.4 경제성 분석
 4. 요약 및 결론
 참고문헌

• 백이(농촌진흥청 시설원예시험장) | Y. PAEK
• 전종길(농촌진흥청 시설원예시험장) | J. G. JEON
• 윤남규(농촌진흥청 시설원예시험장) | N. K. YUN
• 강금춘(농촌진흥청) | G. C. Kang
• 이시영(농촌진흥청) | S. Y. LEE