Design and investigation of the electrical generation efficiency of a hybrid solar and wind chimney power system in Libya

In an era where transitioning to renewable energy is crucial for environmental sustainability and energy security, the development of advanced technologies capable of efficiently harnessing natural resources is essential. Solar chimney systems, which utilize solar energy for power generation and natural ventilation, present a promising solution, particularly in regions rich in sunlight. This thesis explores the application of solar chimney technology in Libya, focusing on enhancing the electrical generation efficiency of a hybrid solar-wind chimney power system. The study involves the design and analysis of the chimney system with the goal of maximizing airflow velocity. The mathematical modeling examines factors such as chimney height and diameter to minimize resistance and improve the system's performance. By incorporating wind turbines inside the chimney or around the solar collector, the system is able to harness both wind and solar energy, leading to an increased overall capacity factor and electrical output. Additionally, the design of the solar collector analyzed to improve solar heat capture. This enhances the temperature differential between the collector and the chimney, promoting stronger air movement and increasing electricity generation. The economic analysis reveals a projected annual energy production of 4,835.64 MWh, yielding an annual revenue of $290,138. With an initial investment of $1,500,000, the system generates a net profit of $240,138 annually, resulting in a payback period of 6.25 years and an ROI of 16.01%. These economic metrics highlight the financial viability of solar chimney systems in Libya. This study addresses the knowledge gap in the efficiency and practicality of solar chimney systems in Libya, contributing to the country's energy diversification and sustainability goals. By employing mathematical design principles, the study provides valuable insights into the potential of solar chimney systems in sun-rich regions.