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Enhanced convective heat transfer using graphene dispersed nanofluids

Nanofluids are having wide area of application in electronic and cooling industry. In the present work, hydrogen exfoliated graphene (HEG) dispersed deionized (DI) water, and ethylene glycol (EG) based nanofluids were developed. Further, thermal conductivity and heat transfer properties of these nan...

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Detalles Bibliográficos
Autores principales: Baby, Tessy Theres, Ramaprabhu, Sundara
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3211354/
https://www.ncbi.nlm.nih.gov/pubmed/21711824
http://dx.doi.org/10.1186/1556-276X-6-289
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author Baby, Tessy Theres
Ramaprabhu, Sundara
author_facet Baby, Tessy Theres
Ramaprabhu, Sundara
author_sort Baby, Tessy Theres
collection PubMed
description Nanofluids are having wide area of application in electronic and cooling industry. In the present work, hydrogen exfoliated graphene (HEG) dispersed deionized (DI) water, and ethylene glycol (EG) based nanofluids were developed. Further, thermal conductivity and heat transfer properties of these nanofluids were systematically investigated. HEG was synthesized by exfoliating graphite oxide in H(2 )atmosphere at 200°C. The nanofluids were prepared by dispersing functionalized HEG (f-HEG) in DI water and EG without the use of any surfactant. HEG and f-HEG were characterized by powder X-ray diffractometry, electron microscopy, Raman and FTIR spectroscopy. Thermal and electrical conductivities of f-HEG dispersed DI water and EG based nanofluids were measured for different volume fractions and at different temperatures. A 0.05% volume fraction of f-HEG dispersed DI water based nanofluid shows an enhancement in thermal conductivity of about 16% at 25°C and 75% at 50°C. The enhancement in Nusselts number for these nanofluids is more than that of thermal conductivity.
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spelling pubmed-32113542011-11-09 Enhanced convective heat transfer using graphene dispersed nanofluids Baby, Tessy Theres Ramaprabhu, Sundara Nanoscale Res Lett Nano Express Nanofluids are having wide area of application in electronic and cooling industry. In the present work, hydrogen exfoliated graphene (HEG) dispersed deionized (DI) water, and ethylene glycol (EG) based nanofluids were developed. Further, thermal conductivity and heat transfer properties of these nanofluids were systematically investigated. HEG was synthesized by exfoliating graphite oxide in H(2 )atmosphere at 200°C. The nanofluids were prepared by dispersing functionalized HEG (f-HEG) in DI water and EG without the use of any surfactant. HEG and f-HEG were characterized by powder X-ray diffractometry, electron microscopy, Raman and FTIR spectroscopy. Thermal and electrical conductivities of f-HEG dispersed DI water and EG based nanofluids were measured for different volume fractions and at different temperatures. A 0.05% volume fraction of f-HEG dispersed DI water based nanofluid shows an enhancement in thermal conductivity of about 16% at 25°C and 75% at 50°C. The enhancement in Nusselts number for these nanofluids is more than that of thermal conductivity. Springer 2011-04-04 /pmc/articles/PMC3211354/ /pubmed/21711824 http://dx.doi.org/10.1186/1556-276X-6-289 Text en Copyright ©2011 Baby and Ramaprabhu; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Nano Express
Baby, Tessy Theres
Ramaprabhu, Sundara
Enhanced convective heat transfer using graphene dispersed nanofluids
title Enhanced convective heat transfer using graphene dispersed nanofluids
title_full Enhanced convective heat transfer using graphene dispersed nanofluids
title_fullStr Enhanced convective heat transfer using graphene dispersed nanofluids
title_full_unstemmed Enhanced convective heat transfer using graphene dispersed nanofluids
title_short Enhanced convective heat transfer using graphene dispersed nanofluids
title_sort enhanced convective heat transfer using graphene dispersed nanofluids
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3211354/
https://www.ncbi.nlm.nih.gov/pubmed/21711824
http://dx.doi.org/10.1186/1556-276X-6-289
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