14.30 Ad Musters - Thal.pdf

1、Top down approach and trends in Thermal ManagementAd Musters4 December 2024Messe StuttgartThal Technologies company profileLED solutionsHigh-End Industrial LED modules design and manufacturingPERFORMANCE MATERIALSProtect electronics with Thal Thermal Interface and insulation materialsENERGYAUTOMOTIV

2、EAVIATIONIOT&SENSINGPOWER ELECTRONICSLED LIGHTINGINNOVATIONENGINEERINGRESEARCH&DEVELOPMENTMANUFACTURINGSUPPLY CHAINTESTINGQUALITY ASSURANCETHERMAL INTERFACE MATERIALSGood things come in threes3 types of thermal management Biology Chemistry Electronics3 types of 3 types of thermalthermal investigatio

3、ninvestigation Never trust only on one type of investigation.Always validate your work by executing one or two other investigations.Analytical thermal calculations3 Criteria for thermal limitationMinimum and Maximum material propertiesLifetime requirementSafety 3 modes of heat transfer1.Conduction2.

4、Convection3.RadiationQ=htotx A x DTTemperature rise DT from junction to air:Q=power dissipationh=heat transfer coefficientA=surface areahtot=hcond+hconv+hradThermalThermal conductivityconductivity Ideally the whole system should have the same temperature.This can be reached with the use of highly th

5、ermal conductive(k)materials and minimizing the interfacial resistance.Materials thermal conductivityCopper 90.400 W/mKGold290 W/mKAluminium 50.235 W/mKSteel(low carbon)66 W/mKBoron Nitride39 W/mKSolder20.50 W/mKStainless Steel 20 W/mKAlumina27 W/mKMica 0.7 W/mKWater0.5 W/mKHeat sink compound0.5.4 W

6、/mKFR40.3 W/mKEpoxy 0.2.0.3 W/mKMylar0.2 W/mKAir 0.027 W/mKSimulation example spreading resistancek=400 W/mKk=50 W/mKk=5 W/mKConvective heat transferBuoyancy heat transferwith air on vertical wallSource:Heat Transfer,Adrian BejanSource:Heat Transfer,Adrian BejanHeat transferQ12=h