دراسة فعالية التخزين الحراري للطاقة الشمسية المجمعة بواسطة المركز الشمسي الأسطواني القطع مكافئ (ptc) في منطقة ورقلة

Résumé: The Parabolic Trough Collector (PTC) is one of the most important solar concentration systems. To enhance the efficiency of PTC, we conducted an experimental study based on the design and implementation of a PTC solar collector with dimensions (2m x 1.8m) coupled with a thermal storage tank. In accordance with the solar radiation and climatic conditions of Ouargla city, we recorded the outlet water temperature both without using a phase change material (PCM) and when using paraffin wax as a PCM. This was done to compensate for interruptions during periods of sunlight absence.The study demonstrated the effectiveness of the paraffin wax in operating this solar system, especially during the phase change process in the charging stage. Subsequently, we calculated the useful heat gain, solar energy collected per hour, hourly solar energy stored in the solar collector, and the charging efficiency throughout the day. The experimental results showed that using a phase change material, such as paraffin wax, increased the efficiency by approximately 24%.To validate our findings, we conducted a numerical simulation of the experimental model, comparing the numerical simulation results with the experimental findings. This allowed us to determine the appropriate dimensions of the PTC and the melting/freezing temperature of the paraffin wax to achieve the desired water temperature for household use during periods of sunlight absence

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