Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How to determine appropriate wter pump

  1. Jan 14, 2009 #1
    A constant volume of 1800 cf of water needs to be introduced into the base of a 60 ft tall (15x15) water tank. I need to determine the hp/kw needed in order to do this. Can anyone explain the math on determining this?

    Thx

    Jeff
     
  2. jcsd
  3. Jan 14, 2009 #2
    If the volume of water is constant, whats the pump for?
     
  4. Jan 14, 2009 #3
    continuous flow, costant flow.
     
  5. Jan 14, 2009 #4
    You need the flow in, say, gallons per minute, cf per hour, or lbs per hour,,,,,,,,

    amount of water / amount of time

    after that it's straightforward.

    Good Luck
     
  6. Jan 14, 2009 #5
    cubic feet per minute flow

    Thx
     
  7. Jan 14, 2009 #6

    russ_watters

    User Avatar

    Staff: Mentor

    Static pressure times flow rate = power. Divide by pump efficiency to get motor power.
     
  8. Jan 14, 2009 #7
    Static pressure times flow rate = power. Divide by pump efficiency to get motor power.

    Thx Russ. I am still not sure how to calculate it.

    25.92 (water pressure at 80 ft) xxxx gpm ?

    jeff
     
  9. Jan 15, 2009 #8
    jm,

    Hydrualic HP = lbs of liquid per minute x head (in feet) / 33,000

    Pump HP = Hyd HP/Pump Efficiency

    After you work this out, call your trusted pump vendor/mnfr, and work out w them the most logical pump to purchase based on your specific needs/ conditions.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?