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Photothermal Conversion Performance of Fe 3 O 4 /ATO Hybrid Nanofluid for Direct Absorption Solar Collector

Author

Listed:
  • Jeonggyun Ham

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

  • Hyemin Kim

    (Graduate School of Chosun University, Chosun University, 309 Pilmundaero, Dong-gu, Gwangju 61452, Republic of Korea)

  • Honghyun Cho

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

Abstract

In order to enhance the efficiency of direct absorption solar collectors, this study carried out an experimental analysis about the optical and photothermal conversion performance of Fe 3 O 4 , ATO (Antimony-doped tin oxide), and Fe 3 O 4 /ATO nanofluids with a total concentration of 0.1 wt%. According to the results of the experiments, Fe 3 O 4 nanofluid outperforms ATO nanofluid in terms of optical absorption; nevertheless, at wavelengths shorter than 600 nm, it also shows significant scattering reflection. The solar-weighted absorption coefficient of Fe 3 O 4 /ATO nanofluid rose from 0.863 ( m F e 3 O 4 / m T o t a l = 0.2) to 0.932 ( m F e 3 O 4 / m T o t a l = 0.8) when the optical path length increased from 0.01 m to 0.06 m. Moreover, the Fe 3 O 4 /ATO hybrid nanofluid achieved a photothermal conversion efficiency of 0.932 when the mass ratio of Fe 3 O 4 to total mass was 0.2, surpassing the efficiencies of 0.892 and 0.898 recorded for 0.1 wt% ATO and Fe 3 O 4 nanofluids, respectively. When present together, the opposing optical characteristics of Fe 3 O 4 and ATO boost photothermal conversion performance, which is anticipated to raise the efficiency of direct absorption solar collectors.

Suggested Citation

  • Jeonggyun Ham & Hyemin Kim & Honghyun Cho, 2024. "Photothermal Conversion Performance of Fe 3 O 4 /ATO Hybrid Nanofluid for Direct Absorption Solar Collector," Energies, MDPI, vol. 17(20), pages 1-14, October.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:20:p:5059-:d:1496737
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