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Power Conservation, Improved Control, and Equipment Protection

Power Conservation, Improved Control, and Equipment Protection. Key Solutions, Inc. Gene E. Keyser, Ph.D. Equipment Protection. Ever wondered about the “why now?” of catastrophic piping failures? Why is it seemingly “always” in the middle of the night?. Equipment Protection.

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Power Conservation, Improved Control, and Equipment Protection

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  1. Power Conservation, Improved Control, and Equipment Protection Key Solutions, Inc. Gene E. Keyser, Ph.D.

  2. Equipment Protection • Ever wondered about the “why now?” of catastrophic piping failures? • Why is it seemingly “always” in the middle of the night?

  3. Equipment Protection Water Hammer – things that go bump in the night! ΔP = ((0.070) (V) (L) / t )+ P1 Where: ΔP = Change in pressure (psig) P1 = Inlet Pressure (psig) V = Flow velocity (ft/sec) t = Valve closing time (sec) L = Pipe length (ft) 0.07 = friction loss, wave form, propagation correction factor

  4. Equipment Protection Water Hammer – Piezometric Effect – Pressure wave at the speed of sound – ΔP typically 400 – 1600 psig

  5. Equipment Protection Water Hammer – Major Causes – Check Valve behavior – Sudden changes to flow rate

  6. Adaptation of Errors One Pump – One Drive

  7. Adaptation of Errors Some Drives – Some Softstarts

  8. Improved Control One Drive – Many Pumps

  9. Improved Control

  10. Improved Control

  11. Electrical Cost • Base Line = 4 x 100 hp station averaging 200 hp • Across The Line starter (ATL) US$170,600 • ATL (-) Check Valves (CV) US$159,750 • ATL (+) drive synchronization(-) CV US$131,000 • Average energy savings using synchronization US $ 39,000 • Typical ROI, installed 16 – 18 months Rate = $0.10 per kWh

  12. Acknowledgements M. Hester, W. Maffett, and many others of the Siemens family of companies. D. Breaux, Wharton-Smith, Inc. G. Fries, P.E., LBFH, Inc.

  13. There are no problems which cannot be eliminated by a geometric arrangement of simple solutions. Gene E. Keyser Key Solutions, Inc.

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