Abstract:

High temperatures are needed to produce electricity from solar energy using steam turbine. High and medium temperature applications are often used by concentrated solar energy systems. The most commonly used of these systems are parabolic coat-type solar collectors. In this type of collectors, the sun rays falling on the reflective surface placed on a parabolic coat are concentrated by reflecting on a receiver (supplier) tube located at the focus point of the parabol where the reflector is placed. Thus, high temperatures are obtained in the receiver pipe and in the fluid that passes through this pipe. In this study, a theoretical research was conducted on parabolic cox-type concentrators. A comparative performance analysis was performed using different materials and geometries for the collective part of the parabolic coat-type collectors. Four design parameters have been used. These are the diameter of the glass cover, the thickness of the absorbent pipe, the diameter of the absorbent pipe and the absorbent pipe material. The effects of different parameters on the performance of the collector have been studied. As a performance criterion, the useful heat transferred to the fluid passed through the sweater has been used. The results showed that the absorption pipe diameter and the material have a remarkable impact on the heat performance, and, on the other hand, the absorption pipe meat thickness and the glass cover diameter have no remarkable impact on the heat performance.

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