Investigation on stability of TiO <sub>2</sub>-SiO <sub>2</sub> nanofluids with ratio (70:30) in W/EG mixture (60:40)

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

Nowadays, thermal energy is essential to the protection of the renewable technology ecosystem in the world. Most researchers study nanofluid related to increased demand for thermal energy, which includes the heating and cooling process. The goal of this analysis was therefore to determine the stability of TiO ₂-SiO ₂ nanofluids (70:30) suspended in W/EG (60:40). This study will help researchers gain insight into the impact of nanoparticle stability on hybrid nanofluids, which will enable researchers to add nanoparticles to solar collector. TiO ₂-SiO ₂ nanofluids with ratio 70:30 was prepared using a one-step process at a volume concentration of 0.3, 0.5, 0.7, and 1.0%. Two of nanoparticles are used, namely TiO ₂ and SiO ₂, and distributed in the base W/EG mixture (60:40). The stability investigation of hybrid nanofluids in this research is performed by UV-Vis, visual sedimentation. The findings from this investigation is stability analysis of hybrid nanofluids by UV-Vis process, which is stable up to 10 days after preparation with 2-hour sonication time. For concentration ratio of 1.0% of the volume concentration of hybrid nanofluids. The optimal absorbance value is 2.3 after 24 hours, which is the ideal consistency of the fluid. Concentrations of 0.3, 0.5 and 0.7% begin to decrease after 24 h and continue to decrease until 10 days (240 h).

Related collections

Most cited references 15

Record: found
Abstract: not found
Article: not found

A review on hybrid nanofluids: Recent research, development and applications

Jahar Sarkar, Pradyumna Ghosh, Arjumand Adil (2015)

0 comments Cited 330 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

Effect of aggregation kinetics on the thermal conductivity of nanoscale colloidal solutions (nanofluid).

Ravi Prasher, Patrick E Phelan, Prajesh Bhattacharya (2006)

The thermal conductivity, k, of nanoscale colloidal suspensions (also known as nanofluid), consisting of nanoparticles suspended in a base liquid, is much higher than the thermal conductivity of the base liquid at very small volume fractions of the nanoparticles. However, experimental results from various groups all across the world have shown various anomalies such as a peak in the enhancement of k with respect to nanoparticle size, an increase as well as a decrease in the ratio of k of these colloidal solutions with the k of the base fluid with increasing temperature, and a dependence of k on pH and time. In this paper, the aggregation kinetics of nanoscale colloidal solutions are combined with the physics of thermal transport to capture the effects of aggregation on k. Results show that the observed anomalies reported in experimental work can be well described by taking aggregation kinetics into account. Finally, we show that colloidal chemistry plays a significant role in deciding the k of colloidal nanosuspensions.