Densifying Modular Data Centers With Hybrid Cooling.pdf

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1、Densifying Modular Data Centers With Hybrid CoolingDATA CENTER FACILITIESFacilityDensifying Modular Data Centers With Hybrid CoolingKarl Rabe,MD,WoodenDataCenterCo-Lead OCP MDCWhat is a Modular Data Center?OCP specs:Custom ContainerAdvantages of MDCs Speed of deployment Minimize on-site skilled labo

2、r Design flexibility Optimization through supply chain diversity Scalability IT density Deployment power Capacity “pay as you grow”High quality Repeatability of factory build Pre-engineering Precision Factory pre-tested Sustainable reduction of on-site waste Reduction in Material Reduction of on-sit

3、e waste Energy EfficiencyCurrent efforts for Liquid-cooling MDCs Loop heat Pipe MDCWhat is Hybrid Cooling?A hybrid cooled rack combines a Door HX and cold plate loops in the servers to enable the potential for 100%liquid cooling Makes use of facility-level liquid cooling infrastructure to minimize o

4、r eliminate dependence on the facility air cooling/supply system A solution that is adopted for high power HPC racks Promotes energy-efficient cooling and heat reuseGoal of this effort Challenge the limitations of the 90 KW MDC form factorBuild High-density infrastructure with native ORV3 liquid-coo

5、ling solutions(D2C+RDHx)Reduce Air Handling Systems Show the efficiency of adiabatic coolingMake door heat exchanger solutions available to the OCP communityParameters of Interest ParameterCommentRack Density in kW30,50&70Percentage of Air cooled servers50%&25%Potential of MDC Module400800 kWby CFD

6、AnalyispPUE locationsFrankfurt,Madrid,Dubai,WyomingAmbient air temperature3235C;sea-level;15C air-side deltaT on ITEOptionsHeat-reuse,Higher DensitiesORV3&Liquid Cooling OCP rack frame with a focus on flexible power systems&native liquid cooling supportORV3 power shelfORV3 BBU shelf(not shown)IT gea

7、r with cold plate loop&blind-mate valvesMating blind-mate valvesHybrid Cooling with ORV3 Active Door HX sized for ORV3;for more details see the ACS Door HX white paperRack with 50kW ITE load25%air cooled1500cfm(2550 cmh)of rack airflow460W of ITE&Door HX fan power(1%of rack IT load)Airflow Considera

8、tions Proportion of air cooling in each rack will drive airflow requirement Empty rack positions may be required to promote flow of air from the rear aisle to the front aisle;this may impact rack quantities Room-level CFD being considered to evaluate these parametersCDU UPSCDURackDoor HXRackDoor HXR

9、ackDoor HXRackDoor HXRackDoor HXRackDoor HXRackDoor HXRackDoor HXRackDoor HXRackDoor HXRackDoor HXRackDoor HXAirflowAirflowAirflowAirflowFront aisleRear aislePlan view of an example layout(white space only)Potential use cases Industry HPCTelco&EdgeResearch HPCHybrid CloudReal-time computing Timeline

10、 for ContributionMailing list:OCP-MDC+subscribeOCP-All.groups.io Wiki:https:/www.opencompute.org/projects/door-heat-exchangerCall to Action 3 Mon1 Mon1 MonGobal S.Start nowdraftFinalPublishedPresent at Global S.Thank you!Outline30mins 25mins preso+5mins Q&A25 mins preso 1213 slides1.KR Title slide2.

11、KR What is a MDC?Allude to the 90kW spec already contributed?Goals of the sub-project?3.KR What are the preferred characteristics of a MDC?High capacity;low overhead;heat reuse?Answer is LC4.KR Existing effort(s)to meet these characteristics LHP concept for MDC5.JEF What is hybrid cooling?Reference

12、image;ability to 100%LC existing HW6.KR Goals of this effort7.KR Parameters of interest8.JEF ORV3+Liquid cooling-Images(frame,power,D2C LC,Door HX);links to documents/contributions9.JEF ORV3 hybrid cooling capability-Plots;fan power consumption10.JEF Need for CFD analysis-Why;limitations;reference image11.KR Potential use-case(s)12.KR Development,participation and contribution timeline13.KR Call to Action