Recently, a closed-type plant factory has been receiving attention as a advanced agricultural method. It has diverse advantages such as climate-independence, high productivity and stable year-round production. However, high energy cost caused by environmental control system is considered as a challenges of a closed-type plant factory. In order to reduce the energy cost, investigation about energy load which is directly connected to energy consumption needs to be conducted. In this study, energy load changes of a plant factory have been analytically analyzed according to the environmental changes. The target plant factory was a lettuce growing container farm. Firstly, the impact of photoperiod, set temperature and relative humidity change were examined. Under the climate condition of Daejeon in South Korea, increase of photoperiod and set temperature rose a yearly energy demand of a container farm. However, increase of set relative humidity decreased a yearly energy demand. Secondly, the climate environment effect was compared by investigating the energy demand under 9 different climate conditions. As a result, the difference between maximum and minimum value of the yearly energy demand showed 21.7%. Lastly, sensitivity analysis of each parameter (photoperiod, set temperature and relative humidity) has been suggested under 3 different climate conditions. The ratio of heating and cooling demand was varied depending on the climate, so the effect of each parameter became different.

서 론
재료 및 방법
    1. 해석 대상
    2. 컨테이너형 식물공장 모델
    3. 해석 조건
결과 및 고찰
    1. 내부 환경 조건에 따른 연간 에너지 요구량
    2. 외부 기후 환경에 따른 연간 에너지 요구량
    3. 민감도 분석
적 요
사 사

• 최은정(한국기계연구원 무탄소연료발전연구실 선임연구원) | Eun Jung Choi (Senior Researcher, Department of Zero-carbon Fuel & Power Generation, Korea Institute of Machinery & Materials, Daejeon 34103, Korea)
• 김재현(한국기계연구원 무탄소연료발전연구실 선임연구원) | Jaehyun Kim (Senior Researcher, Department of Zero-carbon Fuel & Power Generation, Korea Institute of Machinery & Materials, Daejeon 34103, Korea)
• 이상민(한국기계연구원 무탄소연료발전연구실 책임연구원) | Sang Min Lee (Principal Researcher, Department of Zero-carbon Fuel & Power Generation, Korea Institute of Machinery & Materials, Daejeon 34103, Korea) Corresponding author