Plant Services - May 2008 - (Page 39) Compressed air systems EFFICIENCY Two stages, two VSDs VS & VST110 performance curves 25 VS 110 125 psig VST 110 125 psig 23 Eliminate the Red Increase the Black and Go Green! The UE Ultrasound Advantage - Improve Production - Cut Energy Waste - Increase Asset Availability - Reduce Unplanned Downtime - Increase Profitability - Reduce Plant Maintenance Costs kW/100 cfm 21 19 17 Condition Monitoring efficiency is only one call or click away! 0 200 400 cfm 600 800 15 Logon to UESoundAdvice.com to Register For a FREE Condition Based Monitoring Whitepaper. Figure 2. Two stages with separate variable-speed drives allow the VST 110 to use about 10% fewer kW/100 cfm than the VS 100 single-stage compressor. achieved with two stages,” says Tom Beck, rotary screw marEnergy consumption comparison keting, Gardner Denver. 100 “Using two motors with VSDs, each driving its own airend, we can control the inter-stage pressure,” says Fasano. “ e resulting two-stage variable-speed compressor is about 10% Savings more efficient than a single-stage variable-speed unit.” 30-35% VSDs can save a lot of energy in the right application as trim compressors, but they are not a panacea,Energy savings: warns Niff Ambrosino, VSD vs on/off 50 general manager, Scales Industrial Technologies, Inc. (www. control scalesindtech.com). ey might be chosen for the wrong reasons, VSD vs modulation control in which case they can’t deliver the expected ROI. Ambrosino says, “Very often, choices are driven byModulationwhich are prerebates, control scriptive – ‘install a variable-speed drive’ – rather than based on On/off control VSD control pre- and post-measurements of consumption.” Shaft power % 0 Today’s frontier: Controls 0 50 100 Superior Technology. Energy Expertise. Certified Training Courses. World-Class Support. P: 1.800.223.1325 E: info@uesystems.com Shaft alignment in a Flash. Let us show you how! ® Annual Energy Cost Savings “Many factories are person performing maintenance,” says Centers. “Our equipment must be able to give them a heads up so they can schedule service and prevent problems.” Quincy’s QSI compressors use a Siemens HMI with a built-in Web interface that can publish trending and operational data automatically. If an airEnergy cost savingspressure gets too high, for exfi lter is clogged or a through reduction ample, the PLC will differential pressure e-mail delivered of alert maintenance via to a$2,500 laptop or cell phone. “E-mailed status reports cover more than 20 parameters with scfm, Example: 600 date-stamped readings on compressor $2,000 conditions 3.0 psi lesspressure loss, of operation to air and fluid ranging from hours $1,452 savings per year. temperatures,” Centers says. 4.5 psi less dp $1,500 But many facilities have an eclectic mix of old and new compressors, of various sizes with different controls. On both old $1,000 3.0 psi less dp and new systems, energy-management control can stabilize $500 system pressures and optimize the combination of compressors 1.5 psi less dp $0 soFull load/off load ratio % lean they’ve got one Sure it’s a bold claim. Don’t think it’s possible? The XA, Fixturlaser’s next generation system for laser alignment of horizontal shafts, is designed to get alignments done fast, really fast. In fact, XA even stands for “express alignment” . We’re ready to prove it. Call today for a demo at your location. ©2008 Vibralign, Inc. Flash is a registered trademark of Adobe Systems Incorporated. M 50 100 150 200 250 300 350 400 450 Flow Rate in scfm 500 .PLANTSERVICES. 550 600 650 39 http://UESoundAdvice.com http://UESoundAdvice.com http://www.uesystems.com http://www.scalesindtech.com http://www.scalesindtech.com http://www.vibralign.com http://www.vibralign.com http://www.plantservices.com
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