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Comparison Study on Photo-Thermal Energy Conversion Performance of Functionalized and Non-Functionalized MWCNT Nanofluid

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  • Tsogtbilegt Boldoo

    (Department of Mechanical Engineering, Graduate school of Chosun University, 309 Pilmundaero, Dong-gu, Gwangju 61452, Korea)

  • Jeonggyun Ham

    (Department of Mechanical Engineering, Chosun University, 309 Pilmundaero, Dong-gu, Gwangju 61452, Korea)

  • Honghyun Cho

    (Department of Mechanical Engineering, Chosun University, 309 Pilmundaero, Dong-gu, Gwangju 61452, Korea)

Abstract

Multiwalled carbon nanotubes (MWCNTs) have attracted attention from researchers because of their superior thermal properties and high optical absorption. In this investigation, the thermal and optical properties of functionalized and nonfunctionalized MWCNT nanofluid based on ethylene glycol/water were experimentally studied and compared. The results indicated that the use of the functionalized MWCNT nanofluid improved the thermal properties and optical absorption performance compared with the nonfunctionalized MWCNT nanofluid. The thermal conductivity enhancement of the functionalized MWCNT nanofluid was higher than that of the nonfunctionalized MWCNT nanofluid. The maximum thermal conductivity enhancement (10.15%) was observed in a functionalized MWCNT concentration of 0.01 wt% at 50 °C compared with the base fluid. In addition, the photo-thermal energy conversion efficiency of the functionalized MWCNT nanofluid was higher than that of the nonfunctionalized one owing to its higher light absorption and thermal conductivity.

Suggested Citation

  • Tsogtbilegt Boldoo & Jeonggyun Ham & Honghyun Cho, 2019. "Comparison Study on Photo-Thermal Energy Conversion Performance of Functionalized and Non-Functionalized MWCNT Nanofluid," Energies, MDPI, vol. 12(19), pages 1-17, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:19:p:3763-:d:272628
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    References listed on IDEAS

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    1. Joo Hee Lee & Seong Geon Hwang & Gwi Hyun Lee, 2019. "Efficiency Improvement of a Photovoltaic Thermal (PVT) System Using Nanofluids," Energies, MDPI, vol. 12(16), pages 1-16, August.
    2. Woobin Kang & Yunchan Shin & Honghyun Cho, 2017. "Economic Analysis of Flat-Plate and U-Tube Solar Collectors Using an Al 2 O 3 Nanofluid," Energies, MDPI, vol. 10(11), pages 1-15, November.
    3. Zeng, Jia & Xuan, Yimin, 2018. "Enhanced solar thermal conversion and thermal conduction of MWCNT-SiO2/Ag binary nanofluids," Applied Energy, Elsevier, vol. 212(C), pages 809-819.
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    1. Tsogtbilegt Boldoo & Jeonggyun Ham & Eui Kim & Honghyun Cho, 2020. "Review of the Photothermal Energy Conversion Performance of Nanofluids, Their Applications, and Recent Advances," Energies, MDPI, vol. 13(21), pages 1-33, November.

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