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Optimizing the Efficiency of the NCAR-Wyoming Supercomputing Center

Optimizing the Efficiency of the NCAR-Wyoming Supercomputing Center. Ademola Olarinde Team Member: Theophile Nsengimana Mentor: Aaron Andersen August 1, 2014. Background. Project Goal: Optimize NWSC e nergy sequence on subcomponent system basis

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Optimizing the Efficiency of the NCAR-Wyoming Supercomputing Center

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  1. Optimizing the Efficiency of the NCAR-Wyoming Supercomputing Center Ademola Olarinde Team Member: TheophileNsengimana Mentor: Aaron Andersen August 1, 2014

  2. Background • Project Goal: Optimize NWSC energy sequence on subcomponent system basis • NWSC houses high performance supercomputers for atmospheric and geoscience modeling across the nation • Opened: October 15, 2012

  3. Energy Subcomponents

  4. NWSC Energy Usage Investigated systems include: • Condenser Water System • Side Stream Filter System • Heating System • Cooling Towers • Air Handlers • UPS firmware upgrade effect • Performance Usage Effectiveness (PUE) • = Total Facility Energy/IT Equipment Energy • 1.0 ≤ PUE ≤ ∞ Remote Inspection Feature

  5. Hydronic Evaporative System CWS • 650F Efficient Water Circulation • Utilizes 450 bends; Oversized Piping Network; and Smaller Pumps • Cooling Tower • Highly efficient tower consuming less at 300F wet-bulb temp • Chiller • Back-up cooling alternative at high relative humidity conditions • Building Automation System • Water System; • Electrical Management; • Air Management CWR CWR – Chilled Water Return CWS – Chilled Water Supply

  6. Cooling Towers (CT) CT Units CT-1 Annual Performance Chart

  7. Preferred Cooling System • CT Power Consumption against Wet Bulb Temperature Chart • 96 kW max CT combined consumption • Preferred alternative to Chillers which runs at 200 kW per unit • Condensing Water & Side Stream Filter System air infiltration

  8. Condensing Water (CW) System • Serves 65oF Chilled Water HX, 65oF & 45oF Chillers • Comprises of 2 pumps • Pump sequence • Dec 28 air infiltration • June air infiltration Condenser Water Pump (CWP) power consumption chart

  9. Side Stream Filter System • Function: Removes dirt from Cooling Tower units • Differential Pressure Transmitter False Signal: • Reading: 10 Psi to 1.5 Psi • Trigger Point Design • Control charts alarm system

  10. Air Infiltration Problem & Solution • Air-water solution & air vaporization along flow channel • Inadequate net positive suction pressure • Water vaporizes in pump impeller & at low pressure points • Water Pressure dropping below vapor pressure at 65oF water temperature • Current air removal approach: • Flushing , Filling &Venting • Backward built-pressure air removal • Increase CT basin height • Recommendation • Install automatic air vent on identified traps upstream • Increase suction head by reducing pump height

  11. Conclusion • NWSC PUEL3,YC 4% improvement • Evaporative cooling system and air infiltration solution challenge • Future Work: Predictive maintenance improvement

  12. Thank You ademola.olarinde@students.tamuk.edu

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