• Case Study Icons-10

    Facility Bio

    • Rockville, MD
    • 313 bed hospital with Acute Care Center
    • 500,000 ft² facility
    • Four (4) Trane chillers
    • 3,700 tons installed cooling capacity
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    Situation

    • Healthcare system energy reduction initiative for all sites
    • Primary-Secondary-Tertiary system with inherent inefficiencies
      • High system pressure
      • Low CHW ΔT
      • High kW/ton
    • Ineffective building pump control required manual intervention
    • Andover BAS with standard sequence, no optimization
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    Solution

    • Convert plant to Integrated Primary-Secondary® design to eliminate bypass low and blending, raise ΔT
    • Install VFDs on 3 of 6 primary CHW pumps
    • Control tertiary pumps to reduce system pressure and wasted energy
    • Install adaptive Control Engine Optimization® solution to continuously minimize kW/ton

Results That Exceed Client Expectations

  • Financial Savings

    • $140,000 utility rebate
    • $87,400 in annual energy savings
  • Energy Impact

    • 760,000 kWh saved annually
    • .31 kW/ton energy efficiency improvement
  • Operational Benefits

    • System experiences much less wear and tear
    • Reduced manual intervention

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