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Guidance request regarding replacement of pumps on overall efficiency

  • 1.  Guidance request regarding replacement of pumps on overall efficiency

    Posted 15 days ago
    Dear All,
    I need a guidance regarding replacement of pumps on the bases of overall efficiency.
    If there is any standard regarding such subject like in Hydraulic Institute standard kindly refer.
    Also guidance is requested regarding life of high energy pumps with reference.

    Regards
    Daniyal



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    Syed Alvi R.Eng, M.ASCE
    Karachi
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  • 2.  RE: Guidance request regarding replacement of pumps on overall efficiency

    Posted 10 days ago
    Try the book, "Optimizing Pumping Systems,"  from HI.

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    Donna Stephens A.M.ASCE
    EIT
    Richland Hills TX
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  • 3.  RE: Guidance request regarding replacement of pumps on overall efficiency

    Posted 7 days ago
    The way I have done such is write specification and get 3 separate vendor replies and make decisions. Best I can do with about you stated.

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    www.gasturbineandersen.com Len Andersen at Gas Turbine events with three patents Construction Project Manager
    Water Swirled Gas Turbine Technology
    New York NY 10116-1529
    [Phone]
    Engineer - Gas Turbine Welding CWI
    + 20 yrs experience
    len@...
    914-536-7101
    800-428-4801 Len
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  • 4.  RE: Guidance request regarding replacement of pumps on overall efficiency

    Posted 7 days ago

    Pump selection (for new or replacement) requires the engineer to calculate the "system curve" - the relationship between flow and head (both friction and static) imposed by the piping network and the source and destination tanks.  The engineer must then review manufacturer "pump curves" - which describe the relationship between flow and head provided by the pump.  Pump curves also show an overlay of efficiency curves.

    The engineer's goal is to find a pump that provides the desired flowrate at the associated system curve head.  This "operating point" is where the pump curve intersects the system curve.  That operating point can occur at a 45% efficiency area or at an 85% efficiency area.  By changing the impeller size or the pump size the engineer can find an operating point that is "the most efficient."

    Folks used to do these calculations by hand, but now we have computer programs.  I used Cameron's Hydraulic Data (17th edition - 1988) to do all my work.  The book is still published today (2002 copyright).  See Amazon link here.



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    Michael Bloom, PE,
    ENV SP, BCEE, CFM (he/him)
    Sustainability Practice Manager
    R.G. Miller Engineers, Inc.
    Houston TX
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