Evaluation of Physicothermal Properties of Silicone Oil Dispersed with Multiwalled Carbon Nanotubes and Data Prediction Using ANN

Raviteja Surakasi,Ekrem Yanmaz,S Srujana,K Ch Sekhar,Naziya Begum,Jayaprakash Venugopal,G Yuvaraj,Karthikeyan Sathasivam

doi:10.1155/2021/3444512

Abstract

The researchers wanted to see whether MWCNTs changed the physicothermal properties of solar thermal working fluids. Assessing thermal properties is vital for solar thermal efficiency. Lubricant contains silicone oil resurfaced. It contains 0.25, 0.5, 0.75, and 1.0% multiwalled carbon nanotubes. Before dispersion in thermic fluids, nanomaterials must be properly surface modified. Between 100°C and 300°C, a fluid’s thermal conductivity and specific heat physical characteristics like viscosity and density may be inferred from data collected between 50°C and 150°C. Thermal conductivity increases by 15% to 20% when carbon nanotubes are dispersed. The pressure drop is minimal at 0.5 percent weight fraction, demonstrating the suitability of nanofluids in closed loop systems. The characteristics are forecasted using feed-forward backpropagation method and GRNN, and the best of them is selected for prediction. In this research, hidden layer neurons and factors are examined.

Highlights

Nanofluid research relies heavily on the study of thermophysical characteristics, which are the primary determinant of heat transmission and flow behaviour
It can be concluded that the dispersion of MWCNTs in thermic fluids improves the thermal properties
The thermal conductivity increased as the mass fraction increased, and the rise was in the range of 5 percent to 20 percent

Summary

Introduction

Nanofluid research relies heavily on the study of thermophysical characteristics, which are the primary determinant of heat transmission and flow behaviour. CNT nanofluid are used in solar thermal collectors This is due to a lack of dispersion in basic fluids. Silicone oil is often used because of its distinct chemical structure, unique combination of properties, low viscosity temperature change, and lack of corrosiveness. When it comes to lubricants and hydraulic fluids, silicone oils are a go-to choice because of their versatility. DPDM400 High Temperature Silicone Heat Transfer Fluid has a viscosity of 400 cSt at 25°C. Dielectric strength, and hydrophobicity characterize DPDM400 High Temperature Silicone Heat Transfer Fluid (insoluble in water). Its high viscosity-to-temperature coefficient allows it to flow

Literature Review

Methodology and Experimentation

Physicochemical Property Evaluation

Discussion and Findings

Prediction of Data Using ANN

Conclusions