Abstract
A decade ago, with the rapid development of modern nanotechnology, particles of nanometer-size (normally less than 100 nm) are used instead of micrometer-size for dispersing in base liquids, and they are called nanofluids. An experimental study is done and the results are plotted in graph to find the effect of mass flow rate, temperature, volume concentration and the convective heat transfer co-efficient for different volume concentrations of nanoparticles from 0.4%-0.6%. The experimental setup consist of 12 power transistors fixed in a 0.5mm thick copper sheet on which an electronic circuit containing 4 lamps is operated, thus generating heat. The heat generated by the transistors is cooled by passing the graphene nanofluids through a set of copper tubes. The experimental study showed that the convective heat transfer coefficient is increased to a larger extent due to the addition of graphene nanoparticles in water and effective cooling is produced compared to that of the conventional cooling systems.
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