27 Aug '13, 3pm

This @edcmagazine article highlights #water conversation efforts being made by various businesses:

Electrical load management,/ul> VFDs, for example, allow more precise control of processes such as water distribution, aeration and chemical feed. Pressure can be maintained to closer tolerances. Wastewater treatment plants can consistently maintain desired dissolved oxygen (DO) concentrations over a wide range of flow and biological loading conditions by using automated controls to link DO sensors to VFDs on the aeration blowers. Energy savings from VFDs can be significant. Affinity laws for centrifugal pumps suggest that even a small reduction in motor speed will highly leverage your energy savings. VFDs can reduce a pump's energy use by as much as 50%. A VFD controlling a pump motor that usually runs less than full speed can substantially reduce energy consumption over a motor running at constant speed for the same period. For a 25-hp motor running 23 hours per day (2 h...

Full article: http://www.edcmag.com/articles/91688

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