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Heat transfer characteristics of flat micro-heat pipe array
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2011
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Advanced PackagingStart-up TimeHeat Transfer CharacteristicsEngineeringMicrofabricationHeat FluxHeat Transfer EnhancementMechanical EngineeringNumerical SimulationThermal ManagementThermodynamicsElectric ChipHeat TransferHeat PipeThermal EngineeringRefrigeration
Various flat micro-heat pipe arrays with miniature axially grooves for electric chip cooling are constructed.A series of experiments including start-up time,temperature distribution and heat flux with different working fluids and filling factors are carried out.The result shows that flat micro-heat pipe arrays have advantages of quicker start-up,less temperature difference and better heat transfer.R141b,acetone,methanol and ethanol are used as working fluids.Flat micro-heat pipe arrays filled with methanol have the best heat transfer performance.The maximum heat flux can reach 102 W·cm-2 while the chip is maintained at its working temperature,below 70℃.The best filling factor of methanol is 0.3 for high heat flux.