This can be controlled by setting the Has Separate Inlet? Property to True. However, some tanks are filled from the top or have altitude valves (sometimes called a "Float Valve") that gradually throttle before they shut. In general, tank inlet and outlet piping are treated as being connected to the tank at the bottom and have only a single altitude valve that shuts the tank off from the rest of the system when the tank reaches its maximum level or elevation. A low alarm user notification message will be generated for each time step during which the tank elevation goes below this value. In the Elevation (Low Alarm) field, enter the low alarm elevation value.In the Operating Range section, change the Use Low Alarm? value to True.A high alarm user notification message will be generated for each time step during which the tank elevation exceeds this value. In the Elevation (High Alarm) field, enter the high alarm elevation value.
In the Operating Range section, change the Use High Alarm? value to True.Double-click a tank element to open the associated Properties editor.You can specify upper and lower tank levels at which user notification messages will be generated during calculation. 014 of the total active volume (0.2, 0.014), and so on. At 0.2 of the total depth the tank stores 0. For example, at 0.1 of the total depth (depth ratio = 0.1) the tank stores 0.028 of the total active volume (volume ratio = 0.028).
#Watergems close pipe or make inactive series
In the Cross-Section Curve dialog that appears, enter a series of points describing the storage characteristics of the tank.Click the ellipsis button (.) in the Cross-Section Curve field.In the Properties window, click the Section menu and select the Variable Area section type.To Define the Cross Section of a Variable Area Tank A depth-to-volume ratio table is used to define the cross sectional geometry of the tank. In a variable area tank, the cross-sectional geometry varies between the minimum and maximum operating elevations. If the user selects Variable Area, it is necessary to provide a depth to volume table. If the tank has a constant cross section that is not circular, the user can select Non-circular and specify the cross sectional area. If a tank is made inactive, any connective pipes should also be made inactive as otherwise this will give an error.ĭefining the Cross Section of a Variable Area Tankīy default, tanks are treated as having a circular shape with a constant cross section described by its diameter. A tank can be made inactive (not used in calculations) by changing the Is active? property to False. In the Properties window, click the menu in the Zone field and select the zone you want.īy default a tank is active in a model.To Apply a Previously Created Zone to a Tank For more information on zones and their use, see Zones. A Zone can contain any number of elements and can include a combination of any or all element types. You can optionally group elements together by any desired criteria through the use of zones. The water level in a tank can be described based on either the hydraulic grade line elevation (Elevation) or the water level above the base elevation (Level). The user can choose either Elevation or Level as the Operating Range Type. The water surface elevation of a tank will change as water flows into or out of it during an extended period simulation.
#Watergems close pipe or make inactive free
A Storage Node is a special type of node where a free water surface exists, and the hydraulic head is the elevation of the water surface above some datum (usually sea level).