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Experimental and numerical investigations on the effect of Al2O3/TiO2H2O nanofluids on thermal efficiency of the flat plate solar collector

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  • Farajzadeh, Ehsan
  • Movahed, Saeid
  • Hosseini, Reza

Abstract

In this study, the effect of using nanofluids on the thermal efficiency of a flat plate solar collector (FPSC) is investigated numerically and experimentally. The results of numerical studies conducted by the open source Computational Fluid Dynamics (CFD) software have good agreement with the experimental results. The studied nanofluids were Al2O3H2O (20 nm 0.1 wt%), TiO2H2O (15 nm 0.1 wt%), and their mixture with equal ratio. The nanofluids were prepared based on two-step method and cetyltrimethylammonium bromide (CTAB) was used as a surfactant. Volume flow rates were 1.5 l/min, 2.0 l/min and 2.5 l/min. Experimental results show that by using Al2O3 (0.1 wt%), TiO2 (0.1 wt%) and the mixture of these two nanofluids, the thermal efficiency will enhance about 19%, 21% and 26%, respectively (compared with water as a working fluid). A mixture of the two nanofluids attains the best thermal performance compared to the two other nanofluids. Since TiO2 is more expensive than Al2O3 Nanopowder, using the mixture of them is more economical with better thermal efficiency. Increasing the concentration of the nanofluid mixture from 0.1 wt% to 0.2 wt% will result in approximately 5% improvement in the thermal efficiency of the solar collector. Also, the thermal efficiency will be intensified by volume flow rate.

Suggested Citation

  • Farajzadeh, Ehsan & Movahed, Saeid & Hosseini, Reza, 2018. "Experimental and numerical investigations on the effect of Al2O3/TiO2H2O nanofluids on thermal efficiency of the flat plate solar collector," Renewable Energy, Elsevier, vol. 118(C), pages 122-130.
    • Handle: RePEc:eee:renene:v:118:y:2018:i:c:p:122-130
    DOI: 10.1016/j.renene.2017.10.102
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    6. Bhat, Amir Yousuf & Qayoum, Adnan, 2023. "Synergistic impact of tube configuration and working fluid on photovoltaic-thermal system performance," Renewable Energy, Elsevier, vol. 207(C), pages 205-217.
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    8. Seyed Reza Shamshirgaran & Hussain H. Al-Kayiem & Korada V. Sharma & Mostafa Ghasemi, 2020. "State of the Art of Techno-Economics of Nanofluid-Laden Flat-Plate Solar Collectors for Sustainable Accomplishment," Sustainability, MDPI, vol. 12(21), pages 1-52, November.
    9. Tembhare, Saurabh P. & Barai, Divya P. & Bhanvase, Bharat A., 2022. "Performance evaluation of nanofluids in solar thermal and solar photovoltaic systems: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 153(C).
    10. Mirnezami, Seyed Abolfazl & Zahedi, Alireza & Shayan Nejad, Ardeshir, 2020. "Thermal optimization of a novel solar/hydro/biomass hybrid renewable system for production of low-cost, high-yield, and environmental-friendly biodiesel," Energy, Elsevier, vol. 202(C).
    11. Zhou, Liqun & Wang, Yiping & Huang, Qunwu, 2019. "CFD investigation of a new flat plate collector with additional front side transparent insulation for use in cold regions," Renewable Energy, Elsevier, vol. 138(C), pages 754-763.
    12. Mohammed Ahmed & Mohammed Muhana Meteab & Qusay Oglah Salih & Hussein A. Mohammed & Omer A. Alawi, 2022. "Experimental Investigation on the Thermophysical and Rheological Behavior of Aqueous Dual Hybrid Nanofluid in Flat Plate Solar Collectors," Energies, MDPI, vol. 15(22), pages 1-23, November.
    13. Coccia, Gianluca & Tomassetti, Sebastiano & Di Nicola, Giovanni, 2021. "Thermal conductivity of nanofluids: A review of the existing correlations and a scaled semi-empirical equation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 151(C).
    14. Ahmadlouydarab, Majid & Ebadolahzadeh, Mohammad & Muhammad Ali, Hafiz, 2020. "Effects of utilizing nanofluid as working fluid in a lab-scale designed FPSC to improve thermal absorption and efficiency," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 540(C).

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