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Analysis and evaluation of thermal performance of parabolic trough collectors using swirl generators technique
(Altınbaş Üniversitesi / Lisansüstü Eğitim Enstitüsü, 2023) Al-Aloosi, Waleed Muwafaq Abdulwahid
In this research, numerical simulations of turbulent flow in a modified parabolic trough solar collector and novel design regarding the inserted fins along the absorber tube was carried out. These fins were inserted as repeat sets, and each set has an increasing height of fins. The 3D simulations were conducted based on the finite volume approach utilizing ANSYS FLUENT. The obtained data are displayed in two different sections. In the first section, investigations were carried out to show impacts of the number of inserted fins on PTC’s thermal performance. Five different models with two, three, four, five and six numbers of localized fins were analyzed and compared with the smooth reference model. The findings exhibit that the thermal performance of all modified models within the tested range of Re is greater than that of the reference model. In addition, the sixth model with six inserted fins has a maximum thermal performance of 1.4. In the second section, different cross-sectional areas of inserted fins including circular, elliptical, and square were examined. For the sixth model, findings reveal that the maximum thermal performance for circular, elliptical and square cross-sectional fins is 1.4, 1.31, and 1.26, respectively, at Re=4000.