Analysis of Nocturnal Thermal Insulation Effect of Thermal Curtain in Plastic Greenhouse

야간(夜間)의 온실내(溫室內) 보온(保溫)커텐의 보온효과분석(保溫效果分析)

A simulation model of plastic greenhouse was developed to evaluate the insulation effect of thermal curtain. Change in thermal environment with and without thermal curtain was verified through experiments, which agreed with the predicted values satisfactorily. About 18 to 20% of energy was saved in the plastic greenhouse by employing the P.E. film thermal curtain. Employing P.E. film thermal curtain also raised the temperature of the covering film and inner air by $1^{\circ}C$ and $1.5{\sim}1.8^{\circ}C$, respectively.