A detailed experimental work on the convective heat transfer characteristics of water based hybrid nanofluids with Graphene Nanoplatelets and Multi Walled Carbon Nanotubes in the ratio 1:1 has been performed. Volume concentrations viz., 0.01%, 0.05%, 0.1%, 0.15% and 0.2% were considered. The hybrid nanofluid was passed through the micro channel heat sink which was electrically heated to simulate the heat load. The heat load was varied from 50W to 200 W while the flow rate of nanofluid was varied from 5 g/s to 30 g/s. The thermal conductivity of the 0.2 vol% nanofluid was 25% higher than the base fluid while the convective heat transfer coefficient was enhanced by 85% leading to a reduction of heat sink temperature by 12 °C. Variations of friction factor during nanofluid flow were nearly constant with respect to Reynolds number and volume concentration of the nanomaterials. This shows the absence of any penalty in the pressure drop with the addition of nanomaterials. The results showed the hybrid nanofluid (Graphene Nanoplatelets /Multi Walled Carbon Nanotubes-water) as an effective coolant for the replacement of the conventional coolant for electronic cooling applications.

已经对比例为 1:1 的石墨烯纳米片和多壁碳纳米管的水基混合纳米流体的对流传热特性进行了详细的实验工作。考虑了体积浓度，即 0.01%、0.05%、0.1%、0.15% 和 0.2%。混合纳米流体通过微通道散热器，该散热器被电加热以模拟热负荷。热负荷从 50W 变化到 200W，而纳米流体的流速从 5g/s 变化到 30g/s。0.2 vol% 纳米流体的热导率比基础流体高 25%，而对流传热系数提高 85%，导致散热器温度降低 12°C。纳米流体流动过程中摩擦系数的变化相对于纳米材料的雷诺数和体积浓度几乎是恒定的。这表明添加纳米材料后压降没有任何损失。结果表明，混合纳米流体（石墨烯纳米片/多壁碳纳米管-水）是一种有效的冷却剂，可替代电子冷却应用中的传统冷却剂。