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  • Users: KeepCool
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  1. KeepCool

    DC motor vs. AC motor Efficiency.

    I am working on a project where they replaced a 3000hp DC motor with a 3000hp AC motor. They are claiming significant energy savings by going with an AC motor with VFD control. The old DC motor also had speed control. The 2 motors have very similar efficiences (95.4%-DC, 96%-AC). Is there...
  2. KeepCool

    kW/Ton for typical older chillers

    I am trying to work up a "quick and dirty" energy savings calculation that is based on industry average kW/Ton for older chillers and the vintage (year). I know I have seen a list of typical kW/Ton for older air-cooled and water-cooled chillers but I can't seem to find it. Any ideas...

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