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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