真实气象条件下CPVT-LFR菲涅尔反射系统数值研究

Abstract This study presents a numerical investigation of a Concentrating Photovoltaic Thermal Linear Fresnel Reflector (CPVT-LFR) system using air and water as cooling working fluids under real Tunisian weather conditions. A quasi-transient mathematical model was developed to predict temperature distributions across all material layers of the reflector system and evaluate its thermal and electrical performance. A parametric analysis was conducted to optimize solar energy utilization. Results indicate that the air-cooled system achieves an average overall efficiency of 78.67%, which is 58.73% higher than the water-cooled system (32.46%). While the air system exhibits superior thermal performance producing 11.9 times more annual thermal energy than the water system the water system generates 1.37 times more electrical power. Additionally, distinct optimal mass flow rates were identified for maximizing either electrical or thermal efficiency. This study demonstrates the potential of CPVT-LFR systems in enhancing solar energy conversion efficiency and provides insights into designing systems tailored to specific applications.