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Recent content by bara

  1. bara

    OVERALL EFFICIENCY FOR VFD CENTRIFUGAL PUMPS

    anyone can help me and tell me if I can find the best way to calculate the overall efficiency of VFD control centrifugal pumps? is there any URL, I can use or any book I can refer to. I already did my calculation but finding different answers with an experimental approaches. I need to verify...
  2. bara

    NEED AN ANSWER

    The efficiency will increase when I change that to three pumps since the RPM of the motor increases and the capacity for each pump will increase. But I have some people who disagree with me based on measuring the I(current), and V(volts). Based on your experience could I miss something in my...
  3. bara

    NEED AN ANSWER

    If I have 5 centrifugal pumps maintaining the same head 165 feet and 2800gpm and the pumps are VFD driven pumps,it is a closed loop pcw(process cooling water system), is it more efficient to have three pumps running the same condition or 5 pumps running? I did some calculation and found the...
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