Design And Study On The Flowing Characteristics Of Multiple Heat Sources

With the wide application of mulichip module technology in packaging technologyof the electronic components, it makes the number of intergrated components graduallyincreasing. Moreover, increasing power of electronic components also led chip’s heataugmentation. Because of the different heat in each component, the temperature of thesubstrate is not uniform, which affects the service life of the substrate. Therefore,designing a radiator for multi-zone heat source has become an important researchdirection in chip cooling.Comparing with the wind cooling, liquid cooling has higher effciency and smallersize. At the same time, because the liquid flows in the channel passage, it can cool offthe different origin of heat distinctively. So, to the multi-zone heat source, liquid coolingcan make the temperature of whole system being more uniform.In the part of theory, based on the basic laws of thermodynamics and fluidmechanics, it is uesed the finite volume method to derive the overall pressure lossformula for the parallel channel. Under the principle of equilibrium, it is designed aparrallel channel that has an exponential modified linear entracn. According to the basicprinciple of heat transfer, it is derived the relation between heat flux density and heatsink size. It designing a more reasonale heat radiator, which has unform heat dissipationfor the whole system.After designing the modeling of the radiator for multi-zone heat sorce, it is usedthe finite element software FLUENT to simulate the thermal analysis. Comparing thetemperature and flow chart of the two model groups, the power exponent linear entraceof the radiator model has a more balanced coolant flow field distribution. And, itsdistribution of temperature field is more uniform. Moreover, it is also verified therelationship between the heat flux density and heat sink size. It also designs areasonable microchannel structure both in the two heat sources and four heat sources.Finally, it is processed the designed microchannel model. Selecting appropriateexpermental equipment and experimental plaform, and testing the four kinds of heat source radiator experiments. Recording data acquisiton of each mode and comparing thelaboratory result. The experimental data verifies the theoretical derivation andsimulation results.