OPTIMIZATION OF FINNED HEAT SINKS WITH ELECTROSPRAY COOLING: FULL FACTORIAL METHOD
Abdüssamed Kabakuş, Kenan Yakut
Abstract
In this study, the optimum heat sink geometry was determined by the full factorial method with electrospray cooling, which has started to find a place among the methods used for the removal of high heat flux in recent years. The experiments were carried out at 4.4 kV voltage, 0.2 mL/min flow rate, d<sub>i</sub>&#61; 0.61 mm nozzle diameter, and 20 mm nozzle-to-heat sink distance. Ethanol was used as the cooling fluid. The experiments were carried out in the cone jet electrospray mode. As a result of the experiments performed with square, rectangular, and triangular fin heat sinks, it was determined that the best cooling performance was achieved in the square fin heat sink. As a result of the experiments carried out with the square fin heat sink with 27 different geometries, it was determined that the most effective cooling was achieved in the Square-18 heat sink with 3 mm fin width, 3 mm fin distance, and 3 mm fin height. An average temperature value of 51&deg;C and a fin enhancement ratio of 1.11 were obtained for eight different heat fluxes (3.2-2.99-2.75-2.59-2.4-2.19-2.02-1.88 kW/m<sup>2</sup>) in the Square-18 heat sink.