Graduation Semester and Year

2021

Language

English

Document Type

Thesis

Degree Name

Master of Science in Mechanical Engineering

Department

Mechanical and Aerospace Engineering

First Advisor

Dereje Agonafer

Second Advisor

Ratan Kumar

Abstract

Conventional cooling methods for an IC chip uses heat spreader to transfer heat from the chip end of the spreader to the opposite end of the spreader which then uses air or water to remove heat and thereby maintaining the overall temperature. Unfortunately, the heat spreader itself has constraints such as conduction resistance which adds the heat spreader inefficiency. But if we increase the area exposed to the cooling end then this can be improved. This is done by introducing channels at that end. These channels act as fins which give a better shot at cooling the system temperature. These channels are classified according to their geometry. This study basically presents improving the impingement cold plate thermal design using analytical and numerical approach. For this, a cold plate resting on a heat dissipating chip has been taken and on top of the cold plate, two heat sinks are placed on it leaving a certain distance in between them for the incoming water flow. During experimentation, the heat from the IC chip passes through the cold plate and transfers to the heat sinks which is cooled by water. A detailed analysis of the influence of change in inlet conditions and heat sink geometry on inlet velocity, pressure drop and maximum temperature has been carried out. pressure drop, temperature rise and thermal resistance across the cold plates have been measured by running simulation on ANSYS Icepak which have been then compared to the numerical results obtained. A number of simulations have been run to obtain the optimum size of mesh grids in ANSYS Icepak to be able to use for the different models to get the best result.

Keywords

Cooling methods, Microchannel heat sink, Inlet velocity, Pressure drop, Temperature, Thermal resistance, ANSYS icepak, Simulation

Disciplines

Aerospace Engineering | Engineering | Mechanical Engineering

Comments

Degree granted by The University of Texas at Arlington

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