The main objectives of this study are to evaluate the performance of a solar thermal collection system utilizing Fresnel lenses through CFD simulation. Solar energy is an infinite energy source, and it can be used for heating and thermal systems. The efficiency of solar thermal energy systems is primarily dependent on the efficiency of the collector unit, leading to the development of various solar thermal systems. In this research, CFD numerical analyses were conducted on two types of solar collection systems using Fresnel lenses to maximize the efficiency of solar energy collection. The first system consists of 16 small Fresnel lenses, a square pipe through which the heat transfers medium flows, and the collector component, forming a flat plate type collector. The second system comprises a single large Fresnel lens and a double-cylinder shell-type absorber that absorbs heat from the lens. To perform CFD analysis, the geometry of the solar thermal collection system was created using 3D modeling software, and a mesh was generated on the 3D model. Subsequently, ANSYS Fluent 2022 R2 software was used to establish the physical models describing the fluid dynamics and heat transfer within the solar thermal collection system, along with setting boundary conditions involving external heat sources. Numerical analysis was then conducted using the software, and the results of both systems were analyzed. While the flat plate collector averaged 60-70% efficiency, a single large Fresnel lens with the double cylindrical shell absorber outperformed it by approximately 5% with an average efficiency of 65-75%. A satisfactory agreement was found when comparing the experimental data from previous studies with the results of this research. In the future, it is anticipated that this system can be further analyzed under various conditions, including different heat transfer media and solar radiation levels. A solar collector of the single large Fresnel lens had demonstrated higher efficiency, and it is believed that improvements in performance and cost-related challenges could make it suitable for applications requiring high energy efficiency, such as hot water supply and heating and cooling systems.