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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-483-0

ISBN Online: 978-1-56700-482-3

4th Thermal and Fluids Engineering Conference
April, 14–17, 2019 , Las Vegas, NV, USA

EXPERIMENTAL STUDY ON STABILITY OF DIFFERENT NANOFLUIDS BY USING DIFFERENT NANOPARTICLES AND BASEFLUIDS

Get access (open in a dialog) pages 1289-1297
DOI: 10.1615/TFEC2019.epa.027991

要約

Stability of nanofluids is extremely important to study so that nanofluids can be used in different applications. In the present work, nanoparticles such as alumina, copper oxide (CuO) and multiwalled carbon nanotubes (MWCNT) are extensively used with different types of base fluids such as water (W) and water/ethylene glycol (W/EG) mixtures (90:10, 80:20, 70:30, 60:40 and 50:50). Alumina nanoparticles are uniformly dispersed in base fluids without surfactant while MWCNT and CuO nanoparticles required SDS and GA surfactant for their uniform dispersion in the base fluids. Further, nanofluids are stabilized by optimizing the sonication time to 80 min. As the stability is an important concern for any nanofluids, so it is determined by measured the thermal conductivity, absorbance and zeta potential of nanofluids with days without disturbing or shaking the samples. The results showed that CuO nanofluids are least stable nanofluids with stability of 2-4 days while MWCNT nanofluids shows a maximum stability of 24-36 days and alumina nanofluids remain stable for 19-28 days. Stability of nanofluids is affected by changing the base fluids and it increases with increase the ethylene glycol ratio in water. Maximum stability of nanofluids is achieved with W/EG (50:50) base fluids either any type of nanoparticles used. So, ethylene glycol itself acts as a stabilizer in water to enhance the nanofluids stability.