不同冷板方向下的高性能两相冷却.pdf

1、OCP EMEA Summit 29 April|Dublin,IrelandDr.Richard Bonner and Dr.Qingyang WangHigh-Performance Two-Phase Cooling under Different Cold Plate OrientationsMarket Need for Different Two-Phase Cold Plate Orientation600kW Racks are Coming with New Architectures!Two-Phase CDUs enabling 250kW+RacksTwo-Phase

2、Cold Plates for 4,500W TDP ProcessorsOrientation based Two-Phase Cold Plate PerformanceSummaryOverviewTwo-Phase cooling performance is required for next gen architectures approaching 600kW in 2027250kW per Rack and 4,500W TDPs demonstrated with two-phase coolingNext Gen architectures will rotate ser

3、vers 90 to maximize power densityTwo-Phase cooling is potentially orientation sensitive due to liquid-vapor phase separationThe Market NeedLiquid Cooled Kyber Rack with Vertical Servers Setfor Deployment 2027,Per NVIDIA at GTCMarch 2025Two-Phase cooling CDU products have recently been released(April

4、 2025)These products can cool 250kW of H100 servers using 40C Facility WaterTwo-Phase Cooling 250kW RacksH100 Junction Temperature(C)CDU Power(kWs)Testing 250kW Racks250kW Thermal Simulation Rack(L)and 5kW Load Simulation Sled(R)Test was run using R515B as the working fluid on a GPU TTVSaturation te

5、mperature was maintained at 40C4,500W was removed efficiently before wall power limitations were reachedNote:Tcase,max the same as Tcase,avg for two-phase due to inherent isothermality Two-Phase Cooling 4,500W TDP ProcessorsProcessor Power/TDP(Watts)Cold Plate Case Temperature(C)Testing same cold pl

6、ate and thermal test vehicle,just rotatedVertical outperforms slightly at higher powersHorizontal upward outperforms slightly at lower powersAll orientations and powers show impressive performancesOrientation DependencyTwo-Phase Cooling pro