Experimental investigation and development of new correlations for heat transfer enhancement and friction factor of BioGlycol/water based TiO2 nanofluids in flat tubes

Nanofluids, as a kind of new engineering material consisting of nanometre-sized additives and base fluids, have gained extensive attention due to their role in improving the efficiency of thermal systems. This paper presents an experimental investigation on the heat transfer coefficient and friction...

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Main Authors:	M.Kh, Abdolbaqi, Rizalman, Mamat, Nor Azwadi, Che Sidik, Azmi, W. H., P., Selvakumar
Format:	Article
Language:	English
Published:	Elsevier Ltd 2017
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/16324/ http://umpir.ump.edu.my/id/eprint/16324/ http://umpir.ump.edu.my/id/eprint/16324/ http://umpir.ump.edu.my/id/eprint/16324/1/Experimental%20investigation%20and%20development%20of%20new%20correlations%20for%20heat%20transfer%20enhancement%20and%20friction%20factor%20of%20BioGlycol-water%20based%20TiO2%20nanofluids%20in%20flat%20tubes.pdf

id	ump-16324
recordtype	eprints
spelling	ump-163242019-06-27T02:08:30Z http://umpir.ump.edu.my/id/eprint/16324/ Experimental investigation and development of new correlations for heat transfer enhancement and friction factor of BioGlycol/water based TiO2 nanofluids in flat tubes M.Kh, Abdolbaqi Rizalman, Mamat Nor Azwadi, Che Sidik Azmi, W. H. P., Selvakumar TJ Mechanical engineering and machinery Nanofluids, as a kind of new engineering material consisting of nanometre-sized additives and base fluids, have gained extensive attention due to their role in improving the efficiency of thermal systems. This paper presents an experimental investigation on the heat transfer coefficient and friction factor of BioGlycol/water based TiO2 nanofluids flowing in a flat tube under turbulent flow conditions. TiO2 nanoparticles with average diameters of 50 nm dispersed in BioGlycol/water of 20:80% mixture ratio respectively with volume concentrations of 0.5–2 vol.% were used as the working fluid. Moreover, this investigation was carried out at operating temperatures of 30, 50 and 70 °C and under constant heat flux boundary conditions. The results showed that the Nusselt number of nanofluid is higher than that of the base liquid and increased with the increasing of the Reynolds number and operating temperatures. The Nusselt number of nanofluids was approximately 28.2% greater than that of base fluid and the results also showed that the Nusselt number of the nanofluids at a volume concentration of 2.0 vol.% was approximately 3% lower than that of base fluids for certain conditions. For the friction factor, the results show that the friction factor of nanofluids at 1.0 vol.% was approximately 6.1% higher than the base fluid and increases with the increase of volume concentrations to be 14.3% at 2.0 vol.% higher than the base fluid. Finally, the new correlations were proposed for predicting the Nusselt number and friction factor of the nanofluids with maximum deviation of 10% and 3% respectively. Elsevier Ltd 2017 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/16324/1/Experimental%20investigation%20and%20development%20of%20new%20correlations%20for%20heat%20transfer%20enhancement%20and%20friction%20factor%20of%20BioGlycol-water%20based%20TiO2%20nanofluids%20in%20flat%20tubes.pdf M.Kh, Abdolbaqi and Rizalman, Mamat and Nor Azwadi, Che Sidik and Azmi, W. H. and P., Selvakumar (2017) Experimental investigation and development of new correlations for heat transfer enhancement and friction factor of BioGlycol/water based TiO2 nanofluids in flat tubes. International Journal of Heat and Mass Transfer, 108. pp. 1026-1035. ISSN 0017-9310 http://doi.org/10.1016/j.ijheatmasstransfer.2016.12.024 10.1016/j.ijheatmasstransfer.2016.12.024
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery M.Kh, Abdolbaqi Rizalman, Mamat Nor Azwadi, Che Sidik Azmi, W. H. P., Selvakumar Experimental investigation and development of new correlations for heat transfer enhancement and friction factor of BioGlycol/water based TiO2 nanofluids in flat tubes
description	Nanofluids, as a kind of new engineering material consisting of nanometre-sized additives and base fluids, have gained extensive attention due to their role in improving the efficiency of thermal systems. This paper presents an experimental investigation on the heat transfer coefficient and friction factor of BioGlycol/water based TiO2 nanofluids flowing in a flat tube under turbulent flow conditions. TiO2 nanoparticles with average diameters of 50 nm dispersed in BioGlycol/water of 20:80% mixture ratio respectively with volume concentrations of 0.5–2 vol.% were used as the working fluid. Moreover, this investigation was carried out at operating temperatures of 30, 50 and 70 °C and under constant heat flux boundary conditions. The results showed that the Nusselt number of nanofluid is higher than that of the base liquid and increased with the increasing of the Reynolds number and operating temperatures. The Nusselt number of nanofluids was approximately 28.2% greater than that of base fluid and the results also showed that the Nusselt number of the nanofluids at a volume concentration of 2.0 vol.% was approximately 3% lower than that of base fluids for certain conditions. For the friction factor, the results show that the friction factor of nanofluids at 1.0 vol.% was approximately 6.1% higher than the base fluid and increases with the increase of volume concentrations to be 14.3% at 2.0 vol.% higher than the base fluid. Finally, the new correlations were proposed for predicting the Nusselt number and friction factor of the nanofluids with maximum deviation of 10% and 3% respectively.
format	Article
author	M.Kh, Abdolbaqi Rizalman, Mamat Nor Azwadi, Che Sidik Azmi, W. H. P., Selvakumar
author_facet	M.Kh, Abdolbaqi Rizalman, Mamat Nor Azwadi, Che Sidik Azmi, W. H. P., Selvakumar
author_sort	M.Kh, Abdolbaqi
title	Experimental investigation and development of new correlations for heat transfer enhancement and friction factor of BioGlycol/water based TiO2 nanofluids in flat tubes
title_short	Experimental investigation and development of new correlations for heat transfer enhancement and friction factor of BioGlycol/water based TiO2 nanofluids in flat tubes
title_full	Experimental investigation and development of new correlations for heat transfer enhancement and friction factor of BioGlycol/water based TiO2 nanofluids in flat tubes
title_fullStr	Experimental investigation and development of new correlations for heat transfer enhancement and friction factor of BioGlycol/water based TiO2 nanofluids in flat tubes
title_full_unstemmed	Experimental investigation and development of new correlations for heat transfer enhancement and friction factor of BioGlycol/water based TiO2 nanofluids in flat tubes
title_sort	experimental investigation and development of new correlations for heat transfer enhancement and friction factor of bioglycol/water based tio2 nanofluids in flat tubes
publisher	Elsevier Ltd
publishDate	2017
url	http://umpir.ump.edu.my/id/eprint/16324/ http://umpir.ump.edu.my/id/eprint/16324/ http://umpir.ump.edu.my/id/eprint/16324/ http://umpir.ump.edu.my/id/eprint/16324/1/Experimental%20investigation%20and%20development%20of%20new%20correlations%20for%20heat%20transfer%20enhancement%20and%20friction%20factor%20of%20BioGlycol-water%20based%20TiO2%20nanofluids%20in%20flat%20tubes.pdf
first_indexed	2023-09-18T22:21:53Z
last_indexed	2023-09-18T22:21:53Z
_version_	1777415711084249088

Experimental investigation and development of new correlations for heat transfer enhancement and friction factor of BioGlycol/water based TiO2 nanofluids in flat tubes

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