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Recent content by paracetamol

  1. paracetamol

    Composite Pump Curve for Dissimilar Pumps in Series

    Many thanks, the attached is clear. [thumbsup]
  2. paracetamol

    Composite Pump Curve for Dissimilar Pumps in Series

    Thank you for your reply. Is there a way to get the combined pump curve plotted in Excel without things getting too complicated? Attached dummy values as an example.https://files.engineering.com/getfile.aspx?folder=3c478814-5f56-439a-be62-5bc386559439&file=pump_curve_in_series_example.xlsx
  3. paracetamol

    Composite Pump Curve for Dissimilar Pumps in Series

    Hello all, I have two dissimilar pumps in series. To plot the composite pump curve, is it okay to assume that Flow_both = (Flow1 + Flow2)/2 and Head = Head1 + Head2? First pump is fixed speed and the second is variable speed. Just trying to find the approx. intersection with the system curve...
  4. paracetamol

    2 identical pumps in parallel - same efficiency?

    Thank you for your reply [smile] Sorry about the purple text, trying the forum's features. So is there a relationship between the %BEP flow and the efficiency? So if BEP is 2000 m3/h and BEP efficiency = 80%. Is there a formula to approximate the efficiency for running the pump at 2400 m3/h...
  5. paracetamol

    2 identical pumps in parallel - same efficiency?

    Hi all, If one pump has a hydraulic efficiency of 85% at BEP, do two of the same pumps running in parallel also have an 85% efficiency? Now say the two pumps are each running at 120% of the BEP flow, how do I find the resulting efficiency? Any help is appreciated. [auto]

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