• Case Study Icons-10

    Facility Bio

    • Auburn Hills, MI
    • 5.3 million ft2 corporate R&D, and data center space
    • Offices for 13,000 employees
    • Fourteen (14) chillers totaling 17,640 tons capacity
    • 24/7/365 critical operations
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    Situation

    • Outdated controls required continuous manual oversight
    • All CHW flow in/out of (2) 3-million-gallon storage tanks
    • Constant speed primary pumps with balance valves
    • Secondary pump VFDs improperly controlled
    • More chillers often running than necessary
    • Low CHW ΔT, high kW/ton
  • Solution

    • Convert chilled water loop to full variable flow
    • Implement redundant PLC and adaptive Control Engine Optimization (CEO®) solution
    • Integrate CEO® with existing site BAS to facilitate remote access
    • Utilize storage tanks to minimize energy
    • VFDs on pumps and towers only when justified by payback

Results That Exceed Client Expectations

  • Financial Savings

    • $200,000 DTE Energy rebate, maximum incentive
    • 28% reduction in annual energy costs
    • 1.7-year payback

     

     

  • Energy Impact

    • 12,130,000 kWh saved annually
    • .35 kW/ton efficiency improvement
  • Operational Benefits

    • Improved reliability of operations
    • Minimized operator oversight
    • Pumps running in eye of efficiency curve reduces  maintenance
    • Remote access provides:
      • Improved performance monitoring & verification
      • Reduce trouble shooting and response time

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