Evaluation and Simulation of using Magnetite as Heat Transfer Medium in Direct Solar Absorption Collectors

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Ebrahimi, Mahyar | 2016

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 48612 (07)
University: Sharif University of Technology
Department: Materials Science and Engineering
Advisor(s): Mohammadi, Mohammad Reza
Abstract:
In this study, application of a Magnetic Nanofluid consisting of Magnetite as Nanoparticle and Water as base fluid in DASC systems is investigated. The DASC system is modeled theoretically and behavior of such system is predicted.In this study a comparison between magnetite Nanofluid and some other common Nanofluids is conducted. The study shows that Magnetite Nanofluid has a better performance and efficiency than Water, Al2O3 Nanofluid and SiO2 Nanofluid. Also magnetite Nanofluid and TiO2 Nanofluid function are almost similar.Also effect of external magnetic field on the performance of magnetite Nanofluid is investigated. It is showed that when the magnetic Nanofluid is subjected to an external magnetic field the performance is improved and higher Temperature is achieved.The results confirms that Magnetic Nanofluids is a good alternative for DASC systems and is recommended to be subjected to more theoretical and practical studies
Keywords:
Nanofluid ; Magnetite ; Magnetic Nanofluids ; Solar Collectors ; Direct Absorption Solar Collector (DASC)