In this study, the cooling capacity and the pressure drop variation in an automobile radiator using nanofluid instead of water with antifreeze that are investigated experimentally. The nanofluid consisted of 50% Ethylene Glycol–Water mixture including Al₂O₃ nanoparticles with 0.5% volumetric concentration was used as coolant. In all experiments, the inlet temperature of the cooling fluid into the radiator was held constant at 95 C. The tests were carried out at the air inlet temperature between 23.4–28.6 °C, the air velocity between 1.7–4.3 m/s, the cooling loads between 2.5–15 kW and the cooling fluid flow rates between 10 and 25 L/min. Results demonstrate that 50% Ethylene Glycol–Water based 0.5% vol. Al₂O₃ nanofluid increased the cooling capacity of the radiator up to 15% compared to the fluid with only 50% Ethylene Glycol–Water mixture. Instead of 15% increment, radiator can make with smaller surface area up to 15%, or the flow rate can be decreased for same heat transfer rate, so fluid pumping power consumption can be reduced in order to save fuel as much as pumping power economy. In addition, it has not been observed a remarkable increase in the pressure drop.

在这项研究中，通过实验研究了使用纳米流体代替带防冻水的汽车散热器的冷却能力和压降变化。纳米流体由50％乙二醇-水混合物组成，该混合物包括体积浓度为0.5％的Al ₂ O ₃纳米颗粒，用作冷却剂。在所有实验中，冷却液进入散热器的入口温度保持恒定在95°C。在进气温度23.4–28.6°C，空气速度1.7–4.3 m / s，冷却负荷在2.5–15 kW之间，冷却液流速在10至25 L / min之间。结果表明，50％乙二醇-水的体积分数为0.5％。铝₂ O ₃与仅含50％乙二醇-水混合物的流体相比，纳米流体将散热器的冷却能力提高了15％。散热器可以代替15％的增量，而将表面积减小到15％，或者在相同的传热速率下可以降低流量，因此可以减少流体泵送的功耗，从而节省燃油并节省泵送的经济性。 。另外，还没有观察到压降明显增加。