Report

Belimo Energy Valve™ Delta T Manager™ Energy Valve Delta T Manager 1 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 Energy Valve Delta T Manager 2 Low Delta T at 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 3 Low Delta T Some of Low Delta T Causes • Low Control Set Point • Fouled Coils • Low Valve Authority Energy Valve Delta T Manager 4 Low Delta T Coil Power vs Delta T Behavior Energy Valve Delta T Manager 5 Low Delta T Cost of Overflowing the Coil… 400000 35 1 350000 30 335000 Power = BTU 300000 2 25 Coil Power Curve 250000 20 200000 Delta T °F 330000 15 150000 Delta T Curve 10 12°F 10.5°F 100000 5 50000 0 0 0 5 10 15 20 25 30 35 40 45 GPM 50 55 60 55 GPM 65 70 75 80 65 GPM Energy Valve Delta T Manager 6 Low Delta T Cost of Overflowing the Coil… 1 2 Δ BTUh 330,000 335,000 1.5% GPM Pump hp 55 GPM 65 GPM 3 Hp increase = (65/55) 18% 65% HP2 GPM 2 ? HP1 GPM 1 3 Energy Valve Delta T Manager 7 Delta T Manager™ Cost of Chiller Staging Chiller Plant Efficiency Design Condition • Design ΔT=12oF (54oF - 42oF) • 360 GPM • 1 Chiller, 90% Load (180 Ton) 360 GPM Loop flow Energy Valve Delta T Manager 8 Delta T Manager™ Cost of Chiller Staging Chiller Plant Efficiency 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 9 Low Delta T Cost of Over Pumping Delta T Manager Signal Wasted Pumping DDC Signal Delta T Manager On Delta T Manager On Energy Valve Delta T Manager 10 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?!?” 11 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 400000 35 Virtually No Power Reduction 350000 335000 325000 30 Delta T Curve 300000 250000 Power Saturation 20 200000 Power Curve Delta T °F Power = BTU 25 15 150000 10 Delta T Set Point 100000 5 50000 0 0 0 5 10 15 20 25 30 35 40 45 GPM 50 55 60 55 GPM 65 70 75 80 65 GPM Energy Valve Delta T Manager 12 Delta T Manager™ Does it really work? Energy Valve Delta T Manager 13 Case Study Large Tech Company in North Carolina DT Management Flow Control Position Control Energy Valve Delta T Manager 96 GPM 144 GPM 240 GPM 14 Case Study MIT University Hayden Library - Boston, MA 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 Energy Valve Delta T Manager 15 Case Study University 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 16 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 17 Thank You ! Visit (www.EnergyValve.com) or Contact Belimo (800) 543-9038 Thank You Energy Valve Delta T Manager 18