Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
EFFECT OF SURFACTANTS IN THERMAL CONDUCTIVITY AND VISCOSITY OF WATER- ETHYLENE GLYCOL BASED MWCNT NANOFLUIDS
Submission Author:
Abdul Orlando Cárdenas Gómez , RJ
Co-Authors:
Abdul Orlando Cárdenas Gómez, Elena Peñaranda, Daniel Florez, ENIO PEDONE BANDARRA FILHO
Presenter: Daniel Florez
doi://10.26678/ABCM.ENCIT2018.CIT18-0608
Abstract
This study presents a combined experimental and theoretical analysis of the thermophysical proprieties of Multi Wall Carbon Nanotubes (MWCNT) nanofluids, using as base fluid a mixture of 50:50 water-ethylene glycol in presence of N-Methyl-2-Pyrrolidone (NMP) and Polyvinylpyrrolidone (PVP) surfactants. It were used three different mass con-centrations, 0.5%, 1.0% and 1.5% for teach surfactant. All of the samples have the same mass concentration of MWCNT (0.1%). The thermal conductivities of the nanofluids samples were measured using a transient hot bridge method, and for the viscosity was used a Couette type viscometer. Results shown that the thermal conductivities of the nanofluid solutions decreased with increasing surfactant concentrations. Carbon-based nanofluids with PVP had better thermal conductivity. However, PVP presents the highest increments in viscosity. This study presents a combined experimental and theoretical analysis of the thermophysical proprieties of Multi Wall Carbon Nanotubes (MWCNT) nanofluids, using as base fluid a mixture of 50:50 water-ethylene glycol in presence of N-Methyl-2-Pyrrolidone (NMP) and Polyvinylpyrrolidone (PVP) surfactants. It were used three different mass con-centrations, 0.5%, 1.0% and 1.5% for teach surfactant. All of the samples have the same mass concentration of MWCNT (0.1%). The thermal conductivities of the nanofluids samples were measured using a transient hot bridge method, and for the viscosity was used a Couette type viscometer. Results shown that the thermal conductivities of the nanofluid solutions decreased with increasing surfactant concentrations. Carbon-based nanofluids with PVP had better thermal conductivity. However, PVP presents the highest increments in viscosity.
Keywords
Surfactant, Nanofluid, MWCNT, thermal conductivity, viscosity
