Characteristics of ethylene glycol-Al2O3 nanofluids prepared by utilizing Al2O3 nanoparticles synthesized from local bauxite

8th International Conference on Physics and its Applications

Syarif, D.G.^1

Center for Applied Nuclear Science and Technology (PSTNT), BATAN Jl. Tamansari 71, Bandung

40135, Indonesia^1

关键词: Bayer process;    CHF enhancement;    Critical heat flux(CHF);    Increasing temperatures;    Nanofluids;    Temperature dependent;    XRD analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/776/1/012042/pdf
DOI  :  10.1088/1742-6596/776/1/012042

来源: IOP

【 摘 要 】

Nanoparticles of Al2O3have been synthesized from local bauxite mineral, and ethylene glycol (EG)-Al2O3nanofluids have been prepared. Powder Al(OOH) was extracted from local bauxite using bayer process, and heated at 600°C for 3 hours to get Al2O3 nanoparticles. XRD analyses showed that the Al2O3nanoparticles crystallizes in γ-Al2O3with crystallite size of 4.12 nm. The specific surface area of the ACO3 nanoparticles was 296.72 m2/gr. Viscosity of the EG-Al2O3nanofluids was temperature dependent, and decreased with increasing temperature. The viscosity of the nanofluids increased with the concentration of the Al2O3nanoparticles. Meanwhile, Critical Heat Flux (CHF) enhancement of the nanofluids increased with the concentration of the Al2O3nanoparticles. The largest CHF enhancement was 54% at Al2O3concentration of 0.095 vol %.