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Effects of Nanofluids in Improving the Efficiency of the Conical Concentrator System

Author

Listed:
  • Alsalame Haedr Abdalha Mahmood

    (Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Korea)

  • Muhammad Imtiaz Hussain

    (Agriculture and Life Sciences Research Institute, Kangwon National University, Chuncheon 24341, Korea
    Green Energy Technology Research Center, Kongju National University, Cheonan 31080, Korea)

  • Gwi-Hyun Lee

    (Interdisciplinary Program in Smart Agriculture, College of Agriculture and Life Sciences, Kangwon National University, Chuncheon 24341, Korea)

Abstract

Fossil fuels are being depleted, resulting in increasing environmental pollution due to greenhouse gases and, consequently, emerging detrimental environmental problems. Therefore, renewable energy is becoming more important; hence, significant research is in progress to increase efficient uses of solar energy. In this paper, the thermal performance of a conical concentrating system with different heat transfer fluids at varied flow rates was studied. The conical-shaped concentrator reflects the incoming solar radiation onto the absorber surface, which is located at the focal axis, where the collected heat is transported through heating mediums or heat transfer fluids. Distilled water and nanofluids (Al 2 O 3 , CuO) were used in this study as the heat transfer fluids and were circulated through the absorber and the heat storage tank in a closed loop by a pump to absorb the solar radiation. The efficiency of the conical concentrating system was measured during solar noon hours under a clear sky. The collector efficiency was analyzed at different flow rates of 2, 4, and 6 L/min. The thermal efficiency, calculated using different heat transfer fluids, were 72.5% for Al 2 O 3 , 65% for CuO, and 62.8% for distilled water. Comparing the thermal efficiency at different flow rates, Al 2 O 3 at 6 L/min, CuO at 6 L/min, and distilled water at 4 L/min showed high efficiencies; these results indicate that the Al 2 O 3 nanofluid is the better choice for use as a heating medium for practical applications.

Suggested Citation

  • Alsalame Haedr Abdalha Mahmood & Muhammad Imtiaz Hussain & Gwi-Hyun Lee, 2021. "Effects of Nanofluids in Improving the Efficiency of the Conical Concentrator System," Energies, MDPI, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:gam:jeners:v:15:y:2021:i:1:p:28-:d:707844
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    References listed on IDEAS

    as
    1. Imtiaz Hussain, M. & Ali, Asma & Lee, Gwi Hyun, 2015. "Performance and economic analyses of linear and spot Fresnel lens solar collectors used for greenhouse heating in South Korea," Energy, Elsevier, vol. 90(P2), pages 1522-1531.
    2. Destek, Mehmet Akif & Aslan, Alper, 2020. "Disaggregated renewable energy consumption and environmental pollution nexus in G-7 countries," Renewable Energy, Elsevier, vol. 151(C), pages 1298-1306.
    3. Ju-Hee Kim & Sin-Young Kim & Seung-Hoon Yoo, 2020. "Public Acceptance of the “Renewable Energy 3020 Plan”: Evidence from a Contingent Valuation Study in South Korea," Sustainability, MDPI, vol. 12(8), pages 1-12, April.
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