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Belimo Energy Valve™ Delta T Manager™

Belimo Energy Valve™ Delta T Manager™. Presentation Agenda. Low Delta T at the Coil Some of Low Delta T Causes Low Delta T Cost of Overflowing Coil Cost of Chiller Staging Cost of Over Pumping Occupant Comfort Does it Really Work? Benefits. Low Delta T at the Coil.

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Belimo Energy Valve™ Delta T Manager™

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  1. Belimo Energy Valve™Delta T Manager™ Energy Valve Delta T Manager

  2. Presentation Agenda Energy Valve Delta T Manager • Low Delta T at the Coil • Some of Low Delta T Causes • Low Delta T • Cost of Overflowing Coil • Cost of Chiller Staging • Cost of Over Pumping • Occupant Comfort • Does it Really Work? • Benefits

  3. Low Delta Tat the Coil • Low Coil Delta T = Inefficient • Heat Transfer • Increase GPM >> No Increase in • Energy output • More Pump HP >> Reduction in • Plant Efficiency Energy Valve Delta T Manager

  4. Low Delta TSome of Low Delta T Causes Energy Valve Delta T Manager Low Control Set Point Fouled Coils Low Valve Authority

  5. Low Delta TCoil Power vs Delta T Behavior Energy Valve Delta T Manager

  6. Low Delta TCost of Overflowing the Coil… 1 335000 330000 2 Coil Power Curve 12°F Delta T Curve 10.5°F 55 GPM 65 GPM Energy Valve Delta T Manager

  7. Low Delta TCost of Overflowing the Coil… ? Energy Valve Delta T Manager

  8. Delta T Manager™Cost of Chiller Staging Design Condition • Design ΔT=12oF (54oF - 42oF) • 360 GPM • 1 Chiller, 90% Load (180 Ton) 360 GPM Loop flow Energy Valve Delta T Manager Chiller Plant Efficiency

  9. Delta T Manager™Cost of Chiller Staging Low ΔT • ΔT=10.4oF(52.4oF - 42oF) • 415 GPM • 2 Chillers, 45% Load (180 Ton) 415 GPM Loop flow No change to the load, but a 2nd Pump and 2nd Chiller are started. Energy Valve Delta T Manager Chiller Plant Efficiency

  10. Low Delta TCost of Over Pumping Delta T Manager Signal Wasted Pumping DDC Signal Delta T Manager On Delta T Manager On Energy Valve Delta T Manager

  11. Delta T Manager™Occupant Comfort “How can I let the Delta T Manager limit flow if it doesn’t measure discharge air temperature? What about occupant comfort?!?”

  12. Delta T Manager™Occupant Comfort Delta T Manager adjusts the valve if the ΔT drops below the set point in order to maintain peak coil efficiency Virtually No Power Reduction 335000 325000 Delta T Curve Power Saturation Power Curve Delta T Set Point 55 GPM 65 GPM Energy Valve Delta T Manager

  13. Delta T Manager™ Does it really work? Energy Valve Delta T Manager

  14. Case StudyLarge Tech Company in North Carolina DT Management 96 GPM Flow Control 144 GPM 240 GPM Position Control Energy Valve Delta T Manager

  15. Case StudyMIT University Hayden Library - Boston, MA Energy Valve Delta T Manager Building and Project Details • 150,000 sq. ft. on 3 floors • 6 AHU provide majority of the cooling Results • Aug 9 - Oct 9, 2010 DT = 6.15°F • Aug 9 - Oct 9, 2011 DT = 12.14°F

  16. Case StudyUniversity of Miami Hospital Building and Project Details • Rosenstiel Building • 11 AHUs • 2600 Tons of Cooling • Over 10,000 GPM Results • Delta T raised from 5.5°F to 10.5°F • Flow ~ 5600 GPM • Estimated $66,000/yr savings • Estimated 2.9 year payback Energy Valve Delta T Manager

  17. Delta T Manager™Benefits • Coil • ΔT Managing for peak coil efficiency • Optimization in retro-fit applications • Chiller Plant • Improved chilled water plant efficiency • Released chiller capacity • Pump • Reduced pump energy • Occupant Comfort • No reduction in supplied energy Belimo Americas Danbury, Connecticut

  18. Thank You !Visit (www.EnergyValve.com)or Contact Belimo(800) 543-9038 Thank You Energy Valve Delta T Manager

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