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Experimental investigation of cooling performance with graphene based nano-fluids in a vehicle radiator

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Abstract

The cooling performance of a vehicle radiator was experimentally investigated using pure water, graphene oxide (GO) and graphene nano ribon (GNR) nano-fluids in this paper. Three different fluid inlet temperatures (36, 40 and 44 °C) and four different flow rates (0.6, 0.7, 0.8 and 0.9 m3 h−1) were performed in the experiments. GO and GNR nano-fluids were obtained at 0.01 and 0.02% vol. concentrations by means of pure water as a base fluid. In order to determine the heat transfer enhancement, the experimental datas were compared as overall heat transfer coefficients (U) for pure water and nano-fluids. The mean enhancement values of U for all temperatures were obtained as 5.41% and 26.08% for 0.01% and 0.02% vol. concentrations of GO/water nano-fluid and 15.62% and 20.64% for 0.01% and 0.02% vol. concentrations of GNR/water nano-fluid, respectively.

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Abbreviations

A:

Area (m2)

cp :

Specific heat (J/kg K)

F:

Correction coefficient

k:

Thermal conductivity coefficient (W/mK)

\( \dot{m} \) :

Mass flow rate (m3/h)

NTU:

Number of transfer unit

q:

Heat load (W)

T:

Temperature (°C)

U:

Overall heat transfer coefficient (W/m2K)

ϕ:

Concentration (%)

ε:

Effectiveness

μ:

Viscosity (kg/m2s)

ρ:

Density (kg/m3)

bf:

Base fluid

f:

Fluid

h,c:

Hot and cold fluids

i,o:

Inlet and outlet conditions

nf:

Nano-fluid

p:

Particle

s:

Surface

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Acknowledgements

This experimental work was supported by Sivas Cumhuriyet University Scientific Research Projects Unit with M-526 project number.

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Authors and Affiliations

  1. Mechanical Engineering Department, Sivas Cumhuriyet University, Sivas, Turkey

    Ferhat Kılınç & Ertan Buyruk

  2. Sivas Vocational High School, Electric and Energy Department, Sivas Cumhuriyet University, Sivas, Turkey

    Koray Karabulut

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  1. Ferhat Kılınç
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  2. Ertan Buyruk
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  3. Koray Karabulut
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Correspondence to Ferhat Kılınç.

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Kılınç, F., Buyruk, E. & Karabulut, K. Experimental investigation of cooling performance with graphene based nano-fluids in a vehicle radiator. Heat Mass Transfer 56, 521–530 (2020). https://doi.org/10.1007/s00231-019-02722-x

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