Savonius Design-based Rotor Performance Optimization with the Usage of Solar Panels as Guiding Nozzles

This study evaluates a hybrid renewable energy system integrating a vertical-axis wind turbine with bifacial solar panels serving as guiding nozzles to enhance energy efficiency via aerodynamic rotor improvements and solar panel optimization. Theoretical and experimental analyses demonstrated guiding nozzles significantly boost rotor performance: torque increased 6,8-fold at 7 m/s wind speed. The system's average power output during the first 10 seconds exceeded a classical rotor by 85 times. Experimental results validated a fourfold power increase over traditional rotors and reduced cut-in speed to 1,5 m/s. Shading loss analysis showed a 31,08% annual energy yield increase when transparent short guiding rows were used. These findings highlight the hybrid system's potential for autonomous energy supply in remote, resource-constrained regions. Future work will optimize guiding nozzle design to further improve efficiency, focusing on balancing aerodynamic gains with solar panel functionality. The study underscores the viability of hybrid renewable configurations in low-wind environments.