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  1. SeattleLuke

    Motor efficiency degradation over time??

    Hello all, I'm doing an energy cost analysis for a hatchery that uses multiple large (100-150 hp) pumps for the process flows. My question is this: Can anyone tell me how much the efficiency of a motor decreases over time? These motors were installed in 1972. I figure the pump efficiency has...
  2. SeattleLuke

    Cost for VFD

    Does anyone have a good rule of thumb for the cost of a VFD? I've heard ~100$/hp ??
  3. SeattleLuke

    Heat from a VFD

    Does anyone have a good method for calculating the heat generated by a VFD?
  4. SeattleLuke

    Heat from VFD?

    Does anyone out there have a good method for calculating the heat generated by a VFD?

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