Novel Hybrid Immersion Liquid Cooling Technique for Data Center.pdf

1、Novel Hybrid Immersion Liquid Cooling Technique for Data CenterMohamad Hnayno Doctor of Engineering in Thermal and EnergyR&D Engineer at OVHcloudNovel Hybrid Immersion Liquid Cooling Technique for Data CenterSERVERCOOLING ENVOVHcloud server cooling via autonomous rack Autonomous rack is a combinatio

2、n of Air and Water coolingCPU and GPU IT equipment rather than CPU and GPU:RAM,MB,hard disks70%of total heat load30%of total heat loadWater cooling using water blocksBuilt-in air cooling fansAir-water heat exchangerServerPipingWater block on CPUAir cooling using air fridge doorsStrategy for a future

3、 designReduce IT operation temperature(RAM,disks)Elimination of fridge doors and CDUsRespect footprint density(U/m2)Fans EliminationUsage of very low environmental impact fluids Immersion liquid cooling technologiesNatural convectionSingle-phaseTo/From Facility waterHeat ExchangerHeat ExchangerTwo-p

4、haseTo/From Facility waterForced convectionSingle-phasePHEXTo/From Facility waterDielectric fluidWatern Servers(n-m)Serversn Serversx(cm)y(cm)x(cm)y(cm)z(cm)z yx(cm)Environmentally friendly nonvolatile fluidsSealed cover not requiredHigh efficiency24U rack(n-m servers)Inflammable(T200C)Volatile flui

5、ds with high environmental impactSealed sophisticated cover is requiredHigh efficiencyTypical 48U rack(n servers)Not inflammableEnvironmentally friendly nonvolatile fluidsSealed cover not requiredLocal pumping systemTypical 48U rack(n servers)Inflammable(T159 C)CondenserOVHclouds Immersion liquid co

6、oling technologyOVHcloud AC/WC systemSingle-phase IC/NCimmersion/liquidtechniqueTo/From Facility waterHeat ExchangerHeat Exchanger(n-m)Serversx(cm)y(cm)European patent EP 4068926A1,April 2023.M.Hnayno,A.Chehade,H.Klaba;OVH.Hybrid immersion cooling system for rack-mounted electronic assemblies.OVHclo