Enhanced heat transfer performance of an automobile radiator with graphene based suspensions

C. Selvam, D. Mohan Lal, Harish Sivasankaran

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We report the convective heat transfer coefficient and pressure drop of graphene nanoplatelets seeded in water-ethylene glycol mixture flowing through an automobile radiator. The volume concentrations of graphene nanoplatelets were varied from 0.1% to 0.5%. Thermophysical properties such as thermal conductivity, viscosity, density and specific heat capacity of nanofluids were measured experimentally. Mass flow rate of nanofluids were varied from 10 g/s to 100 g/s. Nanofluid inlet temperature was considered as 35 °C and 45 °C while the ambient air velocity was fixed as 3 m/s for the convective heat transfer experiments. The convective heat transfer coefficient of nanofluids increases with increasing loading of graphene nanoplatelets, nanofluid inlet temperature and mass flow rate. The enhancement of convective heat transfer coefficient for the highest concentration (0.5 vol%) and highest mass flow rate (100 g/s) was found to be 20% and 51% when the nanofluid inlet temperature was 35 °C and 45 °C respectively. The pressure drop of nanofluid increases with respect to graphene nanoplatelets loading and mass flow rate. As the loading of nanoplatelets increases from 0 to 0.5 vol% the pressure drop increases from 3.07 to 4.88 kPa at 35 °C while it increases from 3.02 to 4.04 kPa at 45 °C for 100 g/s. The present nanofluid has a potential to replace the conventional heat transfer fluids leading to compact thermal systems.

Original languageEnglish
Pages (from-to)50-60
Number of pages11
JournalApplied Thermal Engineering
Volume123
DOIs
Publication statusPublished - Jan 1 2017

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Automobile radiators
Graphene
Flow rate
Heat transfer coefficients
Heat transfer
Pressure drop
Specific heat
Ethylene glycol
Temperature
Thermal conductivity
Thermodynamic properties
Viscosity
Fluids
Air
Water
Experiments

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Cite this

Enhanced heat transfer performance of an automobile radiator with graphene based suspensions. / Selvam, C.; Mohan Lal, D.; Sivasankaran, Harish.

In: Applied Thermal Engineering, Vol. 123, 01.01.2017, p. 50-60.

Research output: Contribution to journalArticle

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