两相冷却技术的最新进展：性能及未来应用.pdf

1、Ken LC ChengThe latest developments in two-phase cooling technology:performance and the future roleThe latest developments in two-phase cooling technology:performance and the future roleCOOLING ENVIRONMENTS&LIQUID COOLINGKen LC ChengEngineer/Wistron CorporationOutline Comparison Between a Single-Pha

2、se System and a Two-Phase System Difficulties in a Two-Phase System Status of Pumped Two-Phase Cooling Technology Why Pumped Two-Phase Cooling Increasing Requirements for Heat DissipationIncreasing Requirements for Heat DissipationGPU power and local heat flux increases exponentiallyAccording to the

3、 trend,local hot-spot heat flux may approach 4 W/mm2by 2027 andexceed 6 W/mm2by 2030Power(W)Heat Flux(W/mm2)Increasing Requirements for Heat Dissipation More difficult to keep junction temperature within specification due to(1)Heterogeneous integration:Less area for heat dissipation(due to more loca

4、l hot spots)(2)2.5D and 3D architectures:Longer thermal path There needs to be a more efficient thermal solutionReference:TSMC,https:/ Phase vs Single PhasePROS&CONSPumped Two-Phase CoolingDLCAir CoolingHeat Flux4x2x1xRack Power Density4.4x2.8x1xPumped Power 1x N/ASaving 65%Two Phase vs Single Phase

5、No.ItemCompatibility1Cold Plate2CDUX3Tubing4Primary Loop5Leakage SensorX6StorageX:Inheritable:Some Parts ReplacedX:Needs New Set-UpFrom PG25 to Refrigerant:the compatible configurationsDifficulties in Pumped Two-Phase CoolingWhat challenges must be addressed?Instability-different heating rates corre

6、spond to different flow patterns-different flow patterns result in various flowrate instabilitiesReference:H.Liu,W.Liu,D.Chen,H.Liu,J.Qin,P.Yan,P.Li,Experimental investigation on flow oscillation of boiling two-phase flow in a single rod channel,Annals of Nuclear Energy 158(2021)