直接液冷技术的演变——从单相到两相.pdf

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1、The Evolution of Direct Liquid Cooling-From Single-Phase to Two-PhaseAEWIN TechnologyThe Evolution of Direct Liquid Cooling-From Single-Phase to Two-PhaseCE LiuDirector/AEWIN TechnologyCOOLING ENVIRONMENTSOutline4321Cooling Evolution TimelinePhysics PrincipleCold Plate StructureThermal EfficiencyCoo

2、ling Evolution TimelineAir CoolingSingle-Phase DLC(SPDLC)Two-Phase DLC(2PDLC)Traditional fans and heat sinksHigh energy consumption Limited heat dissipation for high-density systemsCoolant stays in liquid state Circulates through cold plates Better thermal efficiency than air Used in HPC and AI work

3、loadsCoolant boils and vaporizes on contact with heatLatent heat of vaporization removes more energy Lower pumping energy,higher heat transfer Often uses engineered fluids like 3M Novec or Chemours SF33Cooling Evolution TimelineSingle-Phase DLCTwo-Phase DLCParameterSPDLC2PDLCHeat transfer modeSensib

4、le heat(convection)Latent heat(boiling/condensation)Coolant stateAlways liquidLiquid VaporEfficiencyLowerHigherOperating complexitySimpleMore complex loop designIdeal applicationModerate heat loadsHigh-density,high-power applicationsPhysics PrincipleT-v(Temperature vs.Specific Volume)a b:sensible he

5、at b d:latent heat SPDLC2PDLCPhysics PrincipleSingle-Phase Direct Liquid Cooling(SPDLC)Heat is removed using sensible heat transfer via forced convection,where the liquid coolant absorbs heat and increases in temperature without undergoing a phase change.Sensible Heat EquationQ:total heat absorbed b

6、y the coolantM:mass flow rate of coolant(kg/s)Cp:specific heat capacity of the coolant(J/kgK)T:temperature rise of the coolant(K)Physics PrincipleTwo-Phase Direct Liquid Cooling(2PDLC)2PDLC leverages the latent heat of vaporizationthe coolant boils upon contact with heat,absorbing large amounts of e