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Experimental and numerical investigations on thermal conductivity of Al2O3/ethylene glycol water and TiO2/ethylene glycol water nanofluids.

Number: pap. n. 299

Author(s) : KUKREJA R., NANDYALA M.

Summary

The use of high power density microelectronic devices has led to increased heat flux in electronic chips. Mostly fluids are employed as heat exchanging media in such devices. In the present study, investigations on temperature dependent thermal conductivity of ethylene glycol-water mixture based nanofluids have been carried out. Ethylene glycol and water mixture in the ratio of 30:70 by volume has been used as a base fluid with nanoparticles of Al2O3 and TiO2 with varying concentration varying from 0.25% to 1% by volume. The thermal conductivity of the nanofluids is measured by transient hot wire method in the temperature range of 20°C to 50°C. The experimental results have been compared with the theoretical models to indicate the ability of the models to predict the thermal conductivity and discrepancies were indicated. The maximum increment of 16.07% in the thermal conductivity was observed for 1% Al2O3 Nano fluid at 50°C, while the minimum of 0.61%, at 20°C was observed for 0.25% TiO2.

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Details

  • Original title: Experimental and numerical investigations on thermal conductivity of Al2O3/ethylene glycol water and TiO2/ethylene glycol water nanofluids.
  • Record ID : 30025979
  • 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.2019.0299

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