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Thread: question storage tank, valve, reservoir and document

  1. #1
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    question storage tank, valve, reservoir and document

    Storage tank
    When defining a storage tank we have to define: type, elevation, minimum level, maximum level, initial level, diameter and minimum volume.
    Does the minimum volume refer to the stored volume when the water level is at minimum level?

    Valve:
    When defining a valve, we have the option to define initial status as none, closed, open or setting.
    Does setting refer to a percentage of open/close valve, i.e. a number between 0-1? Or what does setting refer to?
    What is the meaning of none?

    I found this document:
    http://www.innovyze.com/bookstore/cwbsa/Chap5.pdf

    Is it possible to access the other chapters? I tried changing ChapX (X the chapter number), but get 404 error

  2. #2
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    Innovyze Employee



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    Vladimir,

    Hi It appears those are sample pages of this book. If you would like to see the entire book, the intent on the site (aka the bookstore) appears to be that you would purchase the book itself.

    Did you have a specific modeling question?

    Patrick Moore

  3. #3
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    Thanks.
    Yes, I have one question about storage tanks
    When defining a storage tank we have to define: type, elevation, minimum level, maximum level, initial level, diameter and minimum volume.

    Does the minimum volume refer to the stored volume when the water level is at minimum level?

  4. #4
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    Innovyze Employee



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    Vladimir,

    Yes, Minimum Volume is the minimum volume when the tank is at its minimum level. Minimum volume is an optional field that is generally only defined when the Minimum level is unknown. Be aware though that any minimum level defined will cause the percent full calculations to use the minimum level as 0% full, so take care of using that field if you are comparing to percent full values based on 0% full being the bottom of the tank. Many people often leave the minimum level for a tank at zero to avoid any confusion and just know that certain tank values are not reasonable. As long as you know how the model considers a minimum level, you are ok, but be aware of how it can impact the model runs and percent full calculations.

    From the Help file:
    Cylindrical Tank


    • A cylindrical tank represents any tank that has a constant
      diameter in relation to its high and low water levels.

    • Specify the Tank Type as Cylindrical in the Type field of the
      Model Explorer - Attribute Tab window.

    • A tank needs the following fields to be populated:


    Elevation -The elevation (above sea
    level) of the bottom of the tank, ft (m).
    Minimum
    Level
    - The lowest allowable water level above the bottom of the tank
    (ex. 3 ft.), ft (m)

    Maximum Level -
    The highest allowable water level above the bottom of the tank (ex. 22 ft.), ft
    (m).

    Initial Level - The height of water
    above the bottom of the tank (ex. 12 ft.) when the simulation is to begin, ft
    (m).Diameter - The diameter of the tank, ft (m).
    Minimum Volume - Only required when minimum level is not
    known, ft3 (m3).

    Note: Minimum Volume is an optional field
    and needs to be entered only in cases when the Minimum Level is not known but
    the Minimum Volume is known. Also for Cylindrical tanks the curve field needs to
    be left blank.

    Please let us know if you have any further questions.

    Patrick Moore

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