Https://Www.Paperrater.Com/Free_Paper_Grader. Http://Plagiarisma.Net/. Abstract—Heat Generation Is
974 WordsMar 24, 20174 Pages
https://www.paperrater.com/free_paper_grader http://plagiarisma.net/ Abstract—Heat generation is unavoidable in electronic devices and SOCs (System On Chip), because of the voltage drops or heavy power consumption of the devices. Heat is getting generated in the complex circuits or in the TSVs (Thru silicon Vias) of a 2.5D and 3D–IC (2.5/3 Dimensional Integrated Circuits) structures. The challenge is to design a most optimized and efficient heat exchangers, by keeping reduced mass and dimensions of the existing heat exchangers and also keep same cooling fans, instead to re-invent the cooling devices. This paper proposes a new design of a heatsink to address such thermal challenges with the laminar forced convective heat transfer on a…show more content…
Moreover, flared fins have their disadvantages like longer and awkward shapes to affect the other devices in the PCBs (Printed Circuit boards) by virtue of their structure. Hence, choosing of the fins for us to leave with the option of straight/flat fins for our study. Special attention is needed while designing the heat transfer surfaces if air is selected as cooling fluid. Basic theoretical model of a heatsink is shown in Fig.1.
Fig. 1. A theoretical model of a novel heatsink.
The thermal models are governed by following equations. Where Rhs is the total thermal resistance of a heatsink, which is summation of thermal resistance of the fin (Rf) and thermal resistance of the base (Rb).
Where, n - number of fins ηf - fin efficiency (dimensionless) hf - convection coefficient of the fin (m2K)
Wf -fin Width (m) tf - fin thickness (m)
Lf - fin height (m) k - thermal conductivity of the fin martial (m.K) tb - thickness of the base (m)
Ab - area of the base (m2)
If these equations are observed closely, for the reduction of thermal resistance of a heatsink, “Ab” base of the heatsink, should be increased and surface area of the fin should also be increased (Wf and Lf). But, to remove the overhead of material and weight of the heatsink, a turtleback shape, within the thickness of a rectangular base is proposed. While choosing the base shape, as a turtle base is left the option of looking at