Convective heat transfer coefficient and pressure drop of water-ethylene glycol mixture with graphene nanoplatelets

C. Selvam, T. Balaji, D. Mohan Lal, Harish Sivasankaran

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In the present work, we report the convective heat transfer coefficient and pressure drop of water-ethylene glycol mixture seeded with graphene nanoplatelets under laminar, transition and turbulent flow regions. Sodium deoxycholate was used as the surfactant to prepare stable nanofluid dispersions. Thermophysical properties of nanofluids were measured experimentally. Experimental investigations on the convective heat transfer coefficient and pressure drop were performed in a tube-in-tube counter flow heat exchanger using nanofluid as the hot fluid and chilled water as the cold fluid. The effects of nanofluid inlet temperature on the convective heat transfer coefficient and pressure drop were investigated for different mass flow rates. The enhancement of convective heat transfer coefficient was found to increase with respect to Reynolds number, graphene loading and inlet temperature. The maximum enhancement of convective heat transfer coefficient is observed to be ∼170% at 0.5 vol% in the turbulent region. The pressure drop increment of the nanofluid is predominant in the laminar region as compared to turbulent region. The enhancement of pressure drop is moderate in the turbulent region which favours these nanofluids to be used in the thermal systems for different engineering applications.

Original languageEnglish
Pages (from-to)67-76
Number of pages10
JournalExperimental Thermal and Fluid Science
Volume80
DOIs
Publication statusPublished - Jan 1 2017

Fingerprint

Graphite
Ethylene Glycol
Ethylene glycol
Graphene
Heat transfer coefficients
Pressure drop
Water
Transition flow
Deoxycholic Acid
Fluids
Dispersions
Laminar flow
Surface-Active Agents
Turbulent flow
Heat exchangers
Reynolds number
Surface active agents
Thermodynamic properties
Sodium
Flow rate

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Nuclear Energy and Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Convective heat transfer coefficient and pressure drop of water-ethylene glycol mixture with graphene nanoplatelets. / Selvam, C.; Balaji, T.; Mohan Lal, D.; Sivasankaran, Harish.

In: Experimental Thermal and Fluid Science, Vol. 80, 01.01.2017, p. 67-76.

Research output: Contribution to journalArticle

@article{50b541631d43412daecd6e65f48f0fe4,
title = "Convective heat transfer coefficient and pressure drop of water-ethylene glycol mixture with graphene nanoplatelets",
abstract = "In the present work, we report the convective heat transfer coefficient and pressure drop of water-ethylene glycol mixture seeded with graphene nanoplatelets under laminar, transition and turbulent flow regions. Sodium deoxycholate was used as the surfactant to prepare stable nanofluid dispersions. Thermophysical properties of nanofluids were measured experimentally. Experimental investigations on the convective heat transfer coefficient and pressure drop were performed in a tube-in-tube counter flow heat exchanger using nanofluid as the hot fluid and chilled water as the cold fluid. The effects of nanofluid inlet temperature on the convective heat transfer coefficient and pressure drop were investigated for different mass flow rates. The enhancement of convective heat transfer coefficient was found to increase with respect to Reynolds number, graphene loading and inlet temperature. The maximum enhancement of convective heat transfer coefficient is observed to be ∼170{\%} at 0.5 vol{\%} in the turbulent region. The pressure drop increment of the nanofluid is predominant in the laminar region as compared to turbulent region. The enhancement of pressure drop is moderate in the turbulent region which favours these nanofluids to be used in the thermal systems for different engineering applications.",
author = "C. Selvam and T. Balaji and {Mohan Lal}, D. and Harish Sivasankaran",
year = "2017",
month = "1",
day = "1",
doi = "10.1016/j.expthermflusci.2016.08.013",
language = "English",
volume = "80",
pages = "67--76",
journal = "Experimental Thermal and Fluid Science",
issn = "0894-1777",
publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Convective heat transfer coefficient and pressure drop of water-ethylene glycol mixture with graphene nanoplatelets

AU - Selvam, C.

AU - Balaji, T.

AU - Mohan Lal, D.

AU - Sivasankaran, Harish

PY - 2017/1/1

Y1 - 2017/1/1

N2 - In the present work, we report the convective heat transfer coefficient and pressure drop of water-ethylene glycol mixture seeded with graphene nanoplatelets under laminar, transition and turbulent flow regions. Sodium deoxycholate was used as the surfactant to prepare stable nanofluid dispersions. Thermophysical properties of nanofluids were measured experimentally. Experimental investigations on the convective heat transfer coefficient and pressure drop were performed in a tube-in-tube counter flow heat exchanger using nanofluid as the hot fluid and chilled water as the cold fluid. The effects of nanofluid inlet temperature on the convective heat transfer coefficient and pressure drop were investigated for different mass flow rates. The enhancement of convective heat transfer coefficient was found to increase with respect to Reynolds number, graphene loading and inlet temperature. The maximum enhancement of convective heat transfer coefficient is observed to be ∼170% at 0.5 vol% in the turbulent region. The pressure drop increment of the nanofluid is predominant in the laminar region as compared to turbulent region. The enhancement of pressure drop is moderate in the turbulent region which favours these nanofluids to be used in the thermal systems for different engineering applications.

AB - In the present work, we report the convective heat transfer coefficient and pressure drop of water-ethylene glycol mixture seeded with graphene nanoplatelets under laminar, transition and turbulent flow regions. Sodium deoxycholate was used as the surfactant to prepare stable nanofluid dispersions. Thermophysical properties of nanofluids were measured experimentally. Experimental investigations on the convective heat transfer coefficient and pressure drop were performed in a tube-in-tube counter flow heat exchanger using nanofluid as the hot fluid and chilled water as the cold fluid. The effects of nanofluid inlet temperature on the convective heat transfer coefficient and pressure drop were investigated for different mass flow rates. The enhancement of convective heat transfer coefficient was found to increase with respect to Reynolds number, graphene loading and inlet temperature. The maximum enhancement of convective heat transfer coefficient is observed to be ∼170% at 0.5 vol% in the turbulent region. The pressure drop increment of the nanofluid is predominant in the laminar region as compared to turbulent region. The enhancement of pressure drop is moderate in the turbulent region which favours these nanofluids to be used in the thermal systems for different engineering applications.

UR - http://www.scopus.com/inward/record.url?scp=84989816556&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84989816556&partnerID=8YFLogxK

U2 - 10.1016/j.expthermflusci.2016.08.013

DO - 10.1016/j.expthermflusci.2016.08.013

M3 - Article

AN - SCOPUS:84989816556

VL - 80

SP - 67

EP - 76

JO - Experimental Thermal and Fluid Science

JF - Experimental Thermal and Fluid Science

SN - 0894-1777

ER -