A novel approach for engineering efficient nanofluids by radiolysis

Abstract

This contribution reports for the first time the possibility of using radiolysis to engineer stable efficient nanofluids which exhibit an enhanced thermal conductivity. The validation was confirmed on Ag-H2O and Ag-C2H6O2 nanofluids fabricated via g-radiolysis within the mild dose range of 0.95 × 103–2.45 × 103 Gray. The enhanced thermal conductivity of Ag-H2O and Ag-C2H6O2 nanofluids, was found to be g-radiations dose dependent. In the latter case of Ag-C2H6O2 nanofluid, the relative enhancement in the temperature range of 25–50 °C was found to be 8.89%, 11.54%, 18.69%, 23.57% and 18.45% for D1 = 0.95 × 103 Gray, D2 = 1.2 × 103 Gray, D3 = 1.54 × 103 Gray, D4 = 1.80 × 103 Gray and D5 = 2.45 × 103 Gray respectively. Yet not optimized, an enhancement of the effective thermal conductivity as much as 23.57% relatively to pure C2H6O2 was observed in stable Ag-C2H6O2 nanofluids. Equivalent results were obtained with Ag-H2O.

Thermophysical properties of MWCNT-Alumina/water nanofluid and their influence on the performance of free convection heat transfer

“…Kumar and Sarviya [31], Kumar and Shaik [32] reviewed the synthesis, characterization methods of hybrid nanofluids. Maaza et al [33] used a novel radiolysis method to prepare nanofluids. Jebali et al [34] synthesized ZnO based nanofluids for highly efficient heat transfer applications.…”

Exploring the surge current degradation of natural ester oil-based nanofluids

“…Nanofluids show a versatile spectrum of applications since they exhibit an enhancement of physicochemical and electrothermal properties of the base liquid 1 – 4 . Actually, the integration of nanoparticles of different shapes, sizes, and chemical compositions results in increased breakdown voltage 5 , 6 , lower partial discharge activity 7 , improved heat transfer 8 , and radiation-proof performance 9 through mechanisms that remain the subject of ongoing investigations. In light of this evidence, natural ester oil-based nanofluids are considered as an environmentally friendly alternative to mineral oils, which are the widely used insulating media and coolants for power transformers 10 .…”