Pool Boiling Heat Transfer Performance and Bubble Dynamics from Pin Fin-Modified Surfaces with Geometrical Shape Variation

In this paper, an experimental study investigating the effect of geometrical shape circular and rectangular pin fins on heat transfer performance boiling phenomenon is presented. A pool experiment in HFE-7100 dielectric working fluid under atmospheric pressure was conducted. Boiling curves coefficients different test cases were plotted to evaluate as well captured images samples. Two quantities, flow resistance wetted perimeter, calculated understand behaviour physics due variation fin and, hence, their performance. It found that cooling higher than fins, despite having a slightly 4% 7%, respectively. This believed be result longer perimeter up 27%, whereby nucleation site has probability generating more bubbles same surface area. For tested modified with 196 144 average performances have differences 3.54 1.58 times larger,