Evangelos Bellos

Recent advances on nanofluids for low to medium temperature solar collectors: energy, exergy, economic analysis and environmental impact

Publisher: Elsevier BV

Date: 05-2021

DOI: 10.1016/J.PECS.2020.100898

Performance assessment of a solar dryer system using small parabolic dish and alumina/oil nanofluid: Simulation and experimental study

Publisher: MDPI AG

Date: 12-12-2019

DOI: 10.3390/EN12244747

Abstract: In this study, a small dish concentrator with a cylindrical cavity receiver was experimentally investigated as the heat source of a dryer. The system was examined for operation with pure thermal oil and Al2O3/oil nanofluid as the working fluids in the solar system. Moreover, the design, the development, and the evaluation of the dried mint plant are presented in this work. Also, the solar dryer system was simulated by the SolidWorks and ANSYS CFX software. On the other side, the color histogram of the wet and dried mint s les based on the RGB method was considered. The results revealed that the different temperatures of the solar working fluids at the inlet and outlet of the cavity receiver showed similar trend data compared to the variation of the solar radiation during the experimental test. Moreover, it is found that the cavity heat gain and thermal efficiency of the solar system was improved by using the nanofluid as the solar working fluid. Furthermore, the required time for mint drying had decreased by increasing the drying temperature and increasing air speed. The highest drying time was measured equal to 320 min for the condition of the air speed equal to 0.5 m/s and the drying temperature of 30 °C. A good agreement was observed between the calculated numerical results and measured experimental data. Finally, based on the color histogram of the wet and dried mint s les, it was concluded that intensity amount of the red color of the mint increased with the drying process compared to intensity amount of the red color of the wet mint s le.

Reducing the optical end losses of a linear Fresnel reflector using novel techniques

Publisher: Elsevier BV

Date: 07-2019

DOI: 10.1016/J.SOLENER.2019.05.020

National Technical University Of Athens

Location: Greece

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School Of Pedagogical And Technological Education

Location: Greece

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Elsevier Foundation

Location: Netherlands

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PPC RENEWABLES

Location: Greece

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Centre For Research And Technology-Hellas

Location: Greece

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Elsevier Foundation

Location: No location found

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