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Visual study on the effect of SiO2/water and CuO/water nanofluids on the start-up and heat transfer performance of pulsating heat pipe.

Number: pap. n. 532

Author(s) : BAO K., FANG Y., XU C., et al.

Summary

Visual experiments were conducted to investigate the start-up and heat transfer performance of pulsating heat pipes (PHPs) charged with different volume fractions (0.2 vol %, 0.5 vol %, 0.8 vol % and 1.0 vol %) of CuO/water and SiO2/water nanofluids. The results showed that the start-up performance of PHPs charged with SiO2/water nanofluids was worsened compared with distilled water-PHP, while CuO/water nanofluids had less effect on the start-up performance. The thermal resistances of PHPs charged with SiO2/water nanofluids ((0.2 – 0.8) vol %) and CuO/water nanofluids ((0.2 – 1.0) vol %) were lower than those of distilled water-PHP. However, with high concentration of SiO2/water nanofluids (1.0 vol %), the heat transfer performance of PHP was worsened at lower heat input (= 54.6 W). The optimal concentration of SiO2/water nanofluids and CuO/water nanofluids were about 0.5 vol % and 0.8 vol %, respectively. In addition, the influence of nanoparticles sedimentation on the heat transfer performance of PHPs was relatively small.

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Details

  • Original title: Visual study on the effect of SiO2/water and CuO/water nanofluids on the start-up and heat transfer performance of pulsating heat pipe.
  • Record ID : 30026004
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0532

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