Heat Transfer Performance of Functionalized Graphene Nanoplatelet Aqueous Nanofluids
The low thermal conductivity of fluids used in many industrial applications is one of the primary limitations in the development of more efficient heat transfer systems. A promising solution to this problem is the suspension of nanoparticles with high thermal conductivities in a base fluid. These su...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2016-06-01
|
Series: | Materials |
Subjects: | |
Online Access: | http://www.mdpi.com/1996-1944/9/6/455 |
id |
doaj-4c31180c0cb24e60b43c19c3bc82cbd1 |
---|---|
record_format |
Article |
spelling |
doaj-4c31180c0cb24e60b43c19c3bc82cbd12020-11-25T00:31:59ZengMDPI AGMaterials1996-19442016-06-019645510.3390/ma9060455ma9060455Heat Transfer Performance of Functionalized Graphene Nanoplatelet Aqueous NanofluidsRoberto Agromayor0David Cabaleiro1Angel A. Pardinas2Javier P. Vallejo3Jose Fernandez-Seara4Luis Lugo5Área de Máquinas y Motores Térmicos, Escola de Enxeñería Industrial, Universidade de Vigo, Vigo E-36310, SpainDepartamento de Física Aplicada, Facultade de Ciencias, Universidade de Vigo, Vigo E-36310, SpainÁrea de Máquinas y Motores Térmicos, Escola de Enxeñería Industrial, Universidade de Vigo, Vigo E-36310, SpainÁrea de Máquinas y Motores Térmicos, Escola de Enxeñería Industrial, Universidade de Vigo, Vigo E-36310, SpainÁrea de Máquinas y Motores Térmicos, Escola de Enxeñería Industrial, Universidade de Vigo, Vigo E-36310, SpainDepartamento de Física Aplicada, Facultade de Ciencias, Universidade de Vigo, Vigo E-36310, SpainThe low thermal conductivity of fluids used in many industrial applications is one of the primary limitations in the development of more efficient heat transfer systems. A promising solution to this problem is the suspension of nanoparticles with high thermal conductivities in a base fluid. These suspensions, known as nanofluids, have great potential for enhancing heat transfer. The heat transfer enhancement of sulfonic acid-functionalized graphene nanoplatelet water-based nanofluids is addressed in this work. A new experimental setup was designed for this purpose. Convection coefficients, pressure drops, and thermophysical properties of various nanofluids at different concentrations were measured for several operational conditions and the results are compared with those of pure water. Enhancements in thermal conductivity and in convection heat transfer coefficient reach 12% (1 wt %) and 32% (0.5 wt %), respectively. New correlations capable of predicting the Nusselt number and the friction factor of this kind of nanofluid as a function of other dimensionless quantities are developed. In addition, thermal performance factors are obtained from the experimental convection coefficient and pressure drop data in order to assess the convenience of replacing the base fluid with designed nanofluids.http://www.mdpi.com/1996-1944/9/6/455heat transfer coefficientnanofluidgraphene nanoplateletspressure drop |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Roberto Agromayor David Cabaleiro Angel A. Pardinas Javier P. Vallejo Jose Fernandez-Seara Luis Lugo |
spellingShingle |
Roberto Agromayor David Cabaleiro Angel A. Pardinas Javier P. Vallejo Jose Fernandez-Seara Luis Lugo Heat Transfer Performance of Functionalized Graphene Nanoplatelet Aqueous Nanofluids Materials heat transfer coefficient nanofluid graphene nanoplatelets pressure drop |
author_facet |
Roberto Agromayor David Cabaleiro Angel A. Pardinas Javier P. Vallejo Jose Fernandez-Seara Luis Lugo |
author_sort |
Roberto Agromayor |
title |
Heat Transfer Performance of Functionalized Graphene Nanoplatelet Aqueous Nanofluids |
title_short |
Heat Transfer Performance of Functionalized Graphene Nanoplatelet Aqueous Nanofluids |
title_full |
Heat Transfer Performance of Functionalized Graphene Nanoplatelet Aqueous Nanofluids |
title_fullStr |
Heat Transfer Performance of Functionalized Graphene Nanoplatelet Aqueous Nanofluids |
title_full_unstemmed |
Heat Transfer Performance of Functionalized Graphene Nanoplatelet Aqueous Nanofluids |
title_sort |
heat transfer performance of functionalized graphene nanoplatelet aqueous nanofluids |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2016-06-01 |
description |
The low thermal conductivity of fluids used in many industrial applications is one of the primary limitations in the development of more efficient heat transfer systems. A promising solution to this problem is the suspension of nanoparticles with high thermal conductivities in a base fluid. These suspensions, known as nanofluids, have great potential for enhancing heat transfer. The heat transfer enhancement of sulfonic acid-functionalized graphene nanoplatelet water-based nanofluids is addressed in this work. A new experimental setup was designed for this purpose. Convection coefficients, pressure drops, and thermophysical properties of various nanofluids at different concentrations were measured for several operational conditions and the results are compared with those of pure water. Enhancements in thermal conductivity and in convection heat transfer coefficient reach 12% (1 wt %) and 32% (0.5 wt %), respectively. New correlations capable of predicting the Nusselt number and the friction factor of this kind of nanofluid as a function of other dimensionless quantities are developed. In addition, thermal performance factors are obtained from the experimental convection coefficient and pressure drop data in order to assess the convenience of replacing the base fluid with designed nanofluids. |
topic |
heat transfer coefficient nanofluid graphene nanoplatelets pressure drop |
url |
http://www.mdpi.com/1996-1944/9/6/455 |
work_keys_str_mv |
AT robertoagromayor heattransferperformanceoffunctionalizedgraphenenanoplateletaqueousnanofluids AT davidcabaleiro heattransferperformanceoffunctionalizedgraphenenanoplateletaqueousnanofluids AT angelapardinas heattransferperformanceoffunctionalizedgraphenenanoplateletaqueousnanofluids AT javierpvallejo heattransferperformanceoffunctionalizedgraphenenanoplateletaqueousnanofluids AT josefernandezseara heattransferperformanceoffunctionalizedgraphenenanoplateletaqueousnanofluids AT luislugo heattransferperformanceoffunctionalizedgraphenenanoplateletaqueousnanofluids |
_version_ |
1725321517004226560 |