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Engine cooling using Al2O3/water nanofluids
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DOI：10.1016/j.applthermaleng.2016.12.099.png)
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Abstract
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In the present study, the characteristics of the steady state turbulent convective heat transfer are experimentally investigated for gamma-Al2O3/water nanofluid used in engine cooling. The tests were performed using gamma-Al2O3 nanoparticles with diameters range of (21-37) nm. The cylinder head of the engine was simulated as rectangular duct made of cast iron with aspect ratio of 0.8. The effect of nanoparticles volume concentration (0-2%), bulk temperature (60-80 degrees C), and flow velocity (1-2 m/s) are investigated for variable heat flux (100-400 kW/m(2)). The results showed that the convective heat transfer coefficient is directly proportional with the flow velocity and inversely proportional with bulk temperature. The highest heat transfer coefficient is 78.67% which achieved at 1% volume concentration of nanoparticles compared with pure water. The gamma-Al2O3 water nanofluid should be used to cool the cast iron components of the engine with limitations. (C) 2016 Elsevier Ltd. All rights reserved.
Keywords:
Heat transfer enhancement
Nanofluids
Engine cooling
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