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1、Single phase immersion cooling developments Research Institutes of Sweden OCP Experience Center working with CastrolDr Jon Summers,Scientific Lead in Data Centers,RISE ICE Datacenter,SwedenNick Barrett,Senior Engineer,Castrol,United KingdomSingle phase immersion cooling developments Research Institu
2、tes of Sweden OCP Experience Center working with CastrolPOWER AND COOLINGCOOLING ENVRISE has the ICE datacenter test and demo facility which is an OCP experience center.Good testbed telemetry brings facts to the data center server immersion community.Castrol have developed dielectric thermal fluids
3、for data center immersion cooling application and continue to research future formulations.Together RISE and Castrol are supporting data center server immersion developments with a technology focus.The goal has been to put the servers and their performance and operability at the center of the collab
4、oration.RISE and Castrol working in partnership.Castrol are developing immersion coolants.*GWP Global Warming Potential.Referring to GWP from leakage into the environment based on 2021 UK Government GHG Conversion Factors for Company Reporting Department for Business,Energy&Industrial Strategy and D
5、epartment for Environmental Food&Rural AffairsLow ViscosityEnabling efficient heat transfer and good pumpabilityProven Thermal PropertiesAcross the operating temperature rangeStrong Electrical CharacteristicsProtecting against breakdown and ignitionHigh Fluid StabilityMaintaining performance over th
6、e fluid lifetimeLow GWP*/Low ODPAll Castrol ON fluids are in line with Castrols PATH360 sustainability programmeRISE ICE datacenter testbed(fixed ambient)RISE ICE datacenter testbedRISE ICE datacenter data collectionPull data from devices.Many protocols.Open source Data provenance tracking.Open sour
7、ce fromnifi.apache.orgEvent streaming platform.Open source fromkafka.apache.orgFilter,transform and stash dataOpen source fromwww.elastic.co/logstashStore time series data for the long-term.Open source Visualize time-series data on dashboards.Open source of ExperimentsPropertyControl or MeasurementU
8、nitsLevels Fluid formulationsControl#A,B,C,DWorkloads(12 CPUs)Control%100(others tested not shown)Fluid Delta TControlC3 and 6Fluid inlet TControlC50 and 20(other temperatures tested not shown)CPU TemperatureMeasurementCPump PowerMeasurementWFluid flow rateMeasurementLpmIT PowerMeasurementWEffect of
9、 coolant properties-50C inlet 6C T3C TABCDABCDCOOLANTEffect of coolant properties-20C inlet 6C T3C TABCDABC DCOOLANTOverall power consumed by system at 100%IT workload0020002050A,6,50B,6,50C,6,50D,6,50A,3,50B,3,50C,3,50D,3,50A,6,20B,6,20C,6,20D,6,20A,3,20B,3,20C,3,20D,3,20Power
10、,WCoolant,T,TemperatureIT PowerPump PowerBest IT performanceBest System performanceThermal resistance is temperature different between CPU and coolant setpoint per CPU W drawn.Lowest thermal resistance is coolant B with 0.227 at 50C and 3C T.Highest thermal resistance is coolant D with 0.269 at 20C
11、and 6C T.Coolant B shows best performance with lowest thermal resistance at high flowrate and high temperature setpoint.Observations from results of coolant properties.Summary of performance tests.Understanding the application and selecting the best coolant properties for single phase immersion can
12、provide benefits.Reduction of CPU temperature.Lower CPU temperature leads to a reduction of IT power consumption.Reduction of Pump Power consumption.Increase cooling flow.Call to ActionWhen considering immersion cooling consider the different coolant properties that have an influence on system perfo
13、rmance.Where to find additional information(URL links)RISE ICE datacenter test and demo facility is an OCP experience center:https:/ri.se/ice Participate in the Cooling Environments/Immersion sub-project to understand coolant properties for immersion-check out the immersion sub-project wiki page:https:/www.opencompute.org/projects/immersion Castrol is an OCP Platinum member supporting Immersion Cooling:https:/ Reach the speakers at jon.summersri.se and Nicholas.B Thank you!Thanks to the RISE ICE datacenter team for the setup and results:Hkan Fredriksson,Tina Stark and Adrian Mellgren