Evaluation of Physicothermal Properties of Solar Thermic Fluids Dispersed with Multiwalled Carbon Nanotubes and Prediction of Data Using Artificial Neural Networks

K Ch Sekhar,Raviteja Surakasi,Ilhan Garip,Naziya Begum,V V Prasanna Kumar,S Srujana,Karthikeyan Sathasivam

doi:10.1155/2021/7306189

Abstract

A review of multiwalled carbon nanotubes as solar thermic fluids and their thermophysical properties is done in this article. The basic fluids were ethylene glycol and water in ratios of 100 : 0, 90 : 10, and 80 : 20. To investigate how surface modification impacts thermophysical properties, three base fluids were combined with surfactant-assisted MWCNTs and oxidized MWCNTs in weight fractions of 0.125, 0.25, and 0.5 percent, respectively. It takes two months to check whether the dispersion stays constant. Thermal conductivity and viscosity measurement were done using heated discs and Anton Paar viscometers. Using oxidized MWCNTs to disperse, the base fluids increased thermal conductivity by 15% to 24%. Surfactant-assisted MWCNTs in nanofluids perform worse than oxidized MWCNTs. The dynamic viscosity of nanofluids is higher than that of basic fluids between 50 and 70°C. During a mathematical computation, all of the MWCNT weight fractions and ethylene glycol volume percentages are included. The correlation may be a good fit for the experimental data within limits. The characteristics are forecasted using feed-forward backpropagation. In this research, buried layer neurons and factors are examined.

Highlights

Studies show suggested nanofluids could be used in a variety of applications, such as heat exchangers, cooling systems for engines and solar thermal systems, and electronic cooling and tribology
Using MWCNTs to disperse fluids, we found that they performed effectively for all weight and water percentages that we tested, including 100 percent water
According to the findings of the research, the following conclusions may be drawn: (1) By adding functional groups to a surface of MWCNTs, after a period of time, they become more stable in ethylene glycol-water combinations than pure MWCNTs

Summary

Introduction

Studies show suggested nanofluids could be used in a variety of applications, such as heat exchangers, cooling systems for engines and solar thermal systems, and electronic cooling and tribology. Their use may help industrial equipment transmit heat more efficiently. Thermic fluids made of ethylene glycol and water may be used to heat water. It is possible to heat ethylene glycol-water mixtures to temperatures up from 100 degrees Celsius to 194 degrees Celsius. In terms of thermophysical properties, they are tested from 50°C up to just below boiling Prediction of both thermal conductivity and viscosity to be affected by temperature and MWCNT mass fraction

Materials and Methodology

Base Fluid Preparation

Physicothermal Property Evaluation

Prediction of Data Using ANN

Results and Discussions

Conclusions