Xpress Optimization Saves Hotel 900,000 kWh Annually

A 16 story mixed-use hotel and office building significantly reduced annual kWh by integrating the Xpress adaptive-control based chilled water optimization solution with their existing building automation system.

Facility Bio

  • Austin, TX
  • 392 bed hotel with office space and dining
  • 3 chillers
  • 2,160 tons
  • Variable Primary system with dedicated primary pumps
  • Variable Condenser Loop with dedicated condenser pumps

Situation

  • Chiller plant replacement
  • BAS using standard control sequence
  • Owner needed “day one” optimization
  • System operating at 0.79 kW/ton

Solution

  • Implement Xpress Energy Efficiency Dashboard
  • Xpress real-time adaptive algorithms including:
    • Efficiency-based Chiller Sequencing
    • Adaptive Pump Sequencing
    • Chilled Water Temp and Flow Optimization
    • Condenser Water Temp and Flow Optimization

Results That Exceed Client Expectations

Financial Savings

  • $80,000 annual savings

Energy Impact

  • 900,000 kWh saved annually
  • .15-.25 monthly kW/ton efficiency improvement

Operational Benefits

  • 96% optimization uptime/plant run-time
  • Improved equipment performance extends operating life with less equipment wear and tear
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