Campus Cuts Cooling Cost 25% and Recovers Lost Capacity

College Campus Cuts Cooling Cost 25% and Recovers Lost Capacity

Xpress® adaptive optimization solution goes beyond energy savings to increase available cooling capacity needed for campus expansion

Facility Bio

  • Home to 9,000 students
  • Central CHW plant serves 44 buildings
  • Three (3) Trane constant speed chillers, 1 with integral HEX bundle
  • 4,500 tons cooling capacity
  • Unmanned operation during warmer months, cooling ~ 8 months/year

Situation

  • Traditional Primary-Secondary hydronic system
  • Low CHW ΔT, high kW/ton
  • Andover control system, no optimization sequence
  • No coordination between buildings and central plant

Solution

  • Convert to full variable flow using Integrated Primary- Secondary® system design
  • Implement tekWorx PLC-based adaptive Control Engine Optimization® solution
  • Integrate with campus BAS to coordinate building and CUP pumping operation

Results That Exceed Client Expectations

Financial Savings

  • $75,000 in annual energy savings
  • 2-year project payback

Energy Impact

  • 1,000,000 kWh saved annually
  • .25 kW/ton efficiency improvement

Operational Benefits

  • Improved CHW flow enabled higher building space temperatures
  • Pumps running in most efficient range, reduced wear and maintenance
  • Remote monitoring makes troubleshooting faster and less expensive
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