Improvement of photo-thermal energy conversion performance of MWCNT/Fe3O4 hybrid nanofluid compared to Fe3O4 nanofluid

Yijie Tong, Tsogtbilegt Boldoo, Jeonggyun Ham and Honghyun Cho

Energy, 2020, vol. 196, issue C

Abstract: The thermal, optical, and photo-thermal energy conversion characteristics of Fe3O4 and multi-walled carbon nanotube (MWCNT)/Fe3O4 hybrid nanofluids, which was suspended in the mixture of water and ethylene glycol (weight ratio = 8:2) base fluid, were experimentally investigated under various conditions. The highest light transmittances of the Fe3O4 and MWCNT/Fe3O4 hybrid nanofluids were 89% and 29%, respectively. Besides, the maximum thermal conductivities of the Fe3O4 and MWCNT/Fe3O4 hybrid nanofluids were 0.541 and 0.562 W/m∙oC, respectively, at a concentration of 0.01 wt%. The MWCNT/Fe3O4 hybrid nanofluid containing the high amount of MWCNT nanoparticles had almost two times higher photo-thermal energy conversion efficiency than that of the Fe3O4 nanofluid at the same weight concentration, thus it had a high potential to improve the heat transfer efficiency in the thermal system.

Keywords: Multi-walled carbon nanotubes (MWCNT); Fe3O4; Hybrid nanofluid; Thermal conductivity; Optical transmittance; Photo-thermal energy conversion (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (11)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:196:y:2020:i:c:s0360544220301936

DOI: 10.1016/j.energy.2020.117086

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