A PTC includes an evacuated tube and a linear parabolic reflector. The evacuated tube is located on the focal line of the parabolic reflector (reflective material bent into a parabolic shape). Thereby, the concentrated solar beam heats the working fluid within the tube. The ability to generate energy over a wide temperature with limited deterioration in efficiency further emphasizes the PTC importance in solar energy generation. The performance of a solar thermal energy conversion system is affected by the collector, the absorber and the concentrator. The operation of these components is governed by the following parameters: optical properties, heat transfer fluid (HTF) properties, inlet temperature, flow rate of HTF, solar insolation, wind speed, and atmospheric temperature. Outputs include collector efficiency, HTF outlet temperature, heat gain, and heat/optical losses. Many academic studies have been conducted on the numerous types of solar thermal collector and their applications.
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