Energetic and exergetic analysis of a new circular micro-heat sink containing nanofluid: applicable for cooling electronic equipment

In this paper, an exergy analysis is performed on the nanofluid stream of alumina water in a novel heat sink. The study heat sink has a new circular design. A constant heat flux from the work of an electrical component is applied to a part of the heat sink bottom. Nanofluid enters this heat sink in the range of 0–1% with Reynolds 500–1500. The heat sink has two separate entries and is made of aluminum. The maximum and mean temperatures of the electronic device and the output nanofluid temperature of the heat sink were studied. Also out exergy, gain exergy, loss exergy and second thermodynamic law were studied. The results of this paper showed that increasing the amount of Reynolds in the flow input decreases the maximum value and the average temperature of heat sink. With the addition of nanoparticles, this has also occurred. The temperature value of the output is also lowered by increasing the Reynolds number and the volume percentage of nanoparticles. The addition of nanoparticles to the base fluid decreases the amount of exergy at the output and also reduces by around 0.3 percent the efficiency of the second thermodynamics law. By adding nanoparticles to the fluid in the heat sink, the amount of loss exergy is minimized.