부산대학교 도서관

In the present greenhouse cultivation system, thermal screens are crucial for reducing energy consumption for heating and cooling in both winter and summer respectively. Protected agricultural systems are rapidly replacing traditional farming methods which raise the energy demand and the development of technologies that facilitate sustainable energy use is essential in agricultural production and horticulture systems. Therefore, the application of passive energy such as energy screens (thermal screen, shading screen, and thermal curtain) in greenhouse farming is vital for reducing the energy demand. This study investigated the energy retention capacity and economic effectiveness of thermal screen materials in South Korea using Transient system simulation (TRNSYS) and material properties. TRNSYS software was employed to evaluate the energy demand, energy-saving capacity of screens, and cost of the equivalent energy conserved. The annual energy demand of the greenhouse, the energy-saving capacity of the screens, and the equivalent energy cost were examined. A multi-span Venlo-type experimental greenhouse (Yeoju, South Korea) was utilised. The simulation results showed that multilayer, thermoreflective, and aluminized strip screens (M3, Clima45, and PH-77) saved 60%, 23.6%, and 22.5% of the greenhouse heating energy demand, respectively. Furthermore, the annual energy saved, and the energy cost were 34.09 kWh. m-2, 13.60 kWh. m-2, and 12.94 kWh. m-2, and 4,490.26 won. m-2, 1,791.17 won. m-2, and 1,704.85 won. m-2, respectively. Our work can help reduce greenhouse energy demand without compromising crop quality.