Experimental Study on Heat Transfer Improvement in a Circular Passage Using Metal Oxide and Ethylene Glycol Based Well Stable Nanofluids

Authors

  • Waqar Ahmed Institute for Advanced Studies, University of Malaya, 50603 Kuala Lumpur, Malaysia
  • Nor Azwadi Che Sidik Takasago i-Kohza, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia
  • Yutaka Asako Takasago i-Kohza, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia

DOI:

https://doi.org/10.37934/arfmts.98.2.90105

Keywords:

Nanofluids, mass flow, circular passage, metal oxides, characterizations

Abstract

Zinc Oxide @ Glycol based nanofluids was prepared using the ultra-sonochemical technique and 2 step methods. The heat convection characteristics of as prepared nanofluids were observed for a closed single conduit in turbulent flow regimes. The prepared nanofluids were characterized for UV-vis, FTIR, XRD, FESEM, and TEM analysis to confirm the accurate synthesis of ZnO nanoparticles. Analytical data related to heat transfer properties of the synthesized nanofluids for the heat exchanger, incorporated with the conduit test section were collected. The addition of ZnO solid nanoparticles in the Ethylene Glycol enhanced the value of thermal conductivity and other thermo physical characteristics of the nanofluids. Supreme thermal conductivity was recorded at 45°C for using 0.1 wt.% of Zinc Oxide @ Glycol based nanofluids. Adding more wt.% of the ZnO solid nanoparticles in the Ethylene Glycol increased the thermal conductivity subsequently with variations in temperature from 20 to 45ºC. Furthermore, Nusselt numbers of Zinc Oxide @ Glycol based nanofluids were calculated at different wt.% of ZnO present in Ethylene Glycol base fluid. The occurrence of ZnO nanoparticles into the Ethylene Glycol base flui