• Modeling Reference - Surge Tanks

    Jesse Dringoli
    Jesse Dringoli
    Product(s): HAMMER Version(s): CONNECT Edition, V8i Area: Modeling Overview This tech-note discusses how to configure the Surge Tank element for transient analysis in HAMMER. Background A Surge Tank (also known as a …
    • 7 months ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • Hammer - Accurate Modelling of a surge Tank

    Matt Baird
    Matt Baird
    Hi I am modelling a hydro power station which features an open surge tank. The surge tank is mostly underground and is 7.0 m in diameter, connecting to the main penstock by a 2.5 m diameter, 9.6 m long steel lined pipe which acts as a throttle. My…
    • over 10 years ago
    • OpenFlows | Water Infrastructure
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  • Re: Hammer: Surge Tank Initial Level

    Matt Baird
    Matt Baird
    Hi Jesse, thanks for your reply. I do have my tank set up as a junction with no check valve, and as you mention this tank level should follow the HGL. My version is 08.11.03.17 which isn't too old I thought? It seems the steady state isn't accounting…
    • sample2.pdf
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    • over 10 years ago
    • OpenFlows | Water Infrastructure
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  • Hammer results interpretation

    suminda
    suminda
    Hello I have modeled a raw water pumping line from a low to a high elevation using Hammer to compute up surge and down surge. My problem is even when using a hydronumatic tank i am getting negative pressures in the pressure envelope at the tail…
    • RWM_WITH SURGE FACILITIES-1.zip
    • over 11 years ago
    • OpenFlows | Water Infrastructure
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  • Re: Hammer: Pelton free-surface tailrace surge

    Matt Baird
    Matt Baird
    Hi, thanks for your reply. You are correct; I am looking at the pipe carrying the water away. I have attached a basic sketch. I am modelling the pelton as a TCV followed by a D2A so I can have multi-stage valve control. Typically I would only be interested…
    • scheme sketch.pdf
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    • over 10 years ago
    • OpenFlows | Water Infrastructure
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  • Hammer: Surge Tank Initial Level

    Matt Baird
    Matt Baird
    When modelling a surge tank it is necessary to dictate the initial level. When the steady state conditions are calculated, this seems to not affect the surge tank initial level, even if it does not match the head at the point on the line where it is installed…
    • over 10 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • Hammer Analysis in Raw Water Transmission System

    bwhite
    bwhite
    I'm trying to evaluate the need for surge protection at new well locations in a raw water transmission system. I have a network of 6 wells all pumping to the water treatment plant. I'm new to Water Hammer and surge analysis so I'm just looking for some…
    • over 10 years ago
    • OpenFlows | Water Infrastructure
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  • Re: orifice in surge tanks

    Jesse Dringoli
    Jesse Dringoli
    Hello Inbarasan, I'm a bit unclear on some of what you said, but I'll try my best to address your questions: "...which is the effective shape in orifice?" The surge tank orifice is assumed to be circular, as you must enter a diameter. If the…
    • over 13 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • Hammer: Pelton free-surface tailrace surge

    Matt Baird
    Matt Baird
    Hi I am currently modelling a number of pelton hydro station layouts. One option may (to be confirmed) include a tailrace tunnel with a free surface. Because the tail race tunnel is so long, surges upon start-up are a concern as could flood the pelton…
    • over 10 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum