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Polargy Smart Containment


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Polargy Smart Containment Presentation

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Polargy Smart Containment

  1. 1. Smart Containment Extending the Life of the Data Center
  2. 2. The Cooling Trend Over provisioned Contain Monitor & Control Energy Waste, but high margin for error Efficiency, but smaller margin for error Increased energy & capex costs driving change Yesterday Today Tomorrow Need new tools to closely couple cooling to demand
  3. 3. Air Mixing Lowers Efficiency • Low -T impairs CRAH efficiency • Capacity unnecessarily limited • 60% of cold air is wasted • Typical 3X over provisioned • Free mixing prevents tight supply control
  4. 4. Containment Stops Mixing • High -T boosts CRAH efficiency • Reduces operating expenses • Capacity expands • Eliminates hotspots • Isolated airflow enables tight supply control
  5. 5. How Does Containment Work? • Airflow isolation barriers prevent hot return air from mixing with cold supply air • The hot return air stays hot, increasing the return air temperature to the CRAH units • The -T across the CRAH increases which results in more efficient cooling • Makes the supply air temperature more uniform across the server inlets, improving reliability
  6. 6. Containment Systems Vertical Panels Horizontal Panels
  7. 7. The Great Debate – Which Aisle Do You Contain? Hot Aisle Cold Aisle • Keeps -T highest by • More direct path of cold preventing cooling of the air to servers vs. hot air • Positive air pressure • Comfort in open area • Comfort in hot aisle • Switch gear • More deployment • Easy to balance zones options
  9. 9. Smart Containment: The Cooling Efficiency Stack MONITOR CONTAIN CONTROL • Temperature • Barriers above racks • Fan speed • Pressure • Doors on aisle ends • Set points • Humidity • Blanking panels • Chilled water flow • Power • Filling floor gaps • Economizer hours • Cooling plant • Plenum returns with • CRAH on/off ducted CRAHs
  10. 10. Monitor & Control Wireless Sensor Network Adaptive Control Measures • Automatic start/stop of CRAC units • Adjust variable speed fans • Change CRAC set points • Increase chilled water set points • Manage the usage of air side economizers
  11. 11. Two Sets of Gains: 1) Containment and 2) Control Baseline After Containment With Control C H H C C H H C • No containment • Cold aisle contained • Controlled CRAHs • High degree of air mixing • Higher -T • ASHRAE inlet temperatures • High inlet temperatures • Increased return temperatures • No change to CRAHs
  12. 12. Published Case Studies LBNL Fan speed reduction of 75% 12% reduction in cooling energy Altera Server inlet variance reduced from 14⁰F to 2⁰F ⁰ ⁰ 12.5% energy reduction Yahoo Supply air temperature increased 21⁰F 21% reduction in cooling energy Published by Accenture/Silicon Valley Leadership Group These are not Polargy projects
  13. 13. Compelling ROI • Energy savings from reduced fan speeds and lower demand on chilled water plant • Reduced heat related failures • Power utility rebates • More capacity out of the data center
  14. 14. Polargy, Inc. 256 Gibraltar Drive, Suite 155 Sunnyvale, CA 94089 888.816.8338