dialing it in: a year of tuning the ncar-wyoming supercomputing center
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Dialing it in: A Year of Tuning the NCAR-Wyoming Supercomputing Center. Aaron Andersen, Deputy Director of Operations, National Center for Atmospheric Research(NCAR). NCAR ’ s Founding Mission. - PowerPoint PPT PresentationTRANSCRIPT
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Dialing it in: A Year of Tuning the NCAR-Wyoming Supercomputing Center
Aaron Andersen, Deputy Director of Operations, National Center for Atmospheric Research(NCAR)
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Aaron AndersenNov., 2013
“… to provide, or arrange for provision of facilities for the scientific community as a whole whose initial cost and upkeep lie beyond the capability of individual universities or research groups.”
Preliminary Plans for a National Institute for Atmospheric Research,
1959, NCAR Blue Book
NCAR’s Founding Mission
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Aaron AndersenNov., 2013
History of Computing at NCAR
Exotic CoolingFreon R-22
Fluorinert
Water
Return of Liquid CoolingWater
Warm Water
FR3
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Aaron AndersenNov., 2013
• Key to Optimum Performance (Three M’s)• Monitoring
• Measurement
• Maintenance
• Infrastructure Support Group – Cheyenne• Electricians
• Mechanics
• Building Automation Controls
• HVAC Technician
• Commissioning Agent• Measurement & Verification 12 months post completion
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Aaron AndersenNov., 2013
Tuning the Facility – Student Interns
• Clair Christofersen - 2012• University of Miami Ohio
• BS Mechanical Engineering – Applied Math
• Air Flow Modeling (CFD Analysis)
• Jason Jones - 2012• Clemson University -> Georgia Tech
• BS Mechanical Engineering
• Air Flow, Water Flow and Total Energy
• Ademola Olarinde - 2013• Texas A&M Kingsville
• MS Mechanical Engineering
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Aaron AndersenNov., 2013
65F (18.3 C) Degree Chilled Water
Evaporative Solution
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Aaron AndersenNov., 2013
Liquid Cooling – ASHRAE 2011 Guidelines
121 hrs1.38%
8639 hrs98.62%
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Aaron AndersenNov., 2013
Characterize Building Response
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Aaron AndersenNov., 2013
• Saw an increase in mechanical consumption in winter months
• Energy Recovery Heat Pumps consuming way more electricity than expected
• Why do we care?• $5000 per month
• What is the root cause?
Mechanical Load in Winter
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Aaron AndersenNov., 2013
• Heat Rejection from Yellowstone is too low 1.2MW vs. 4MW Design
• Significantly greater heating demand from the building during winter months
• Commissioning Agent identified the same problem and possible culprit, large Air Handling Units
Root Cause
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Aaron AndersenNov., 2013
Why This Matters
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Aaron AndersenNov., 2013
• UPS Efficiency• Only Critical Systems are Covered on UPS
• Disk• Network• AuthN/AuthZ• Login• Management
• Low load causes low efficiency
• Firmware upgrade moves UPS efficiency from 70% ~ 95%
• Maintenance really matters• Cleaning strainers improve pump energy by 20 KW
• More frequent maintenance than recommended
• Water Usage• Zero Blow down for Cooling Tower saving 40%
• Negotiated reduction in Sewer cost ~$2500/month
Other Issues
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Aaron AndersenNov., 2013
PUE Trend Since Startup
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Aaron AndersenNov., 2013
PUE – One Year Aug 2012 – July 2013