부산대학교 도서관

The integration of hybrid renewable energy and thermal energy storage systems (HRETESSs) in the agricultural sector holds significant potential for reducing greenhouse gas emissions and enhancing operational efficiency. This study encompassed numerical and experimental investigations within a smart greenhouse equipped with HRETESSs in South Korea. The integrated system encompassed solar thermal (ST) collectors, photovoltaic thermal (PVT) collectors, thermal energy storage, and heat pump systems. Using experimental data to calibrate a validated TRNSYS model, the performance of HRETESSs in different places in South Korea was looked at. Additionally, the RETScreen software facilitated the techno-economic evaluation of these systems. Of notable significance, the air-source heat pump assumed the most substantial role in the smart greenhouse's energy load. This dominance emerged from its sole utilization during cooling cycles, coupled with its superior performance in Chuncheon and Busan. In the southern region, particularly Busan and Jeju, a heightened solar electric fraction was observed. This phenomenon was attributed to the warmer winter climate, which facilitated the photovoltaic system's remarkable performance even with equivalent electric loads compared to other cities. Jeju Island, characterized by relatively modest energy demands, displayed the highest levelized cost of energy, and as total revenue from carbon reduction decreased, the simple payback period increased. The results of the parametric study that looked at the ST system showed that the ST collector area has a bigger effect on both the solar fraction and the ST efficiency than the tank thermal energy storage volume. Furthermore, the injection of heat into the borehole thermal energy storage (BTES) from ST and PVT collectors amplified BTES's contribution to the smart greenhouse's overall load. Throughout the cities under examination, the HRETESSs exhibited an average contribution of 43% and 20% towards meeting thermal and electrical requirements, correspondingly leading to a yearly reduction of 4326-5157 tons of CO2 emissions.