Fig. 5.1.1: Preset values box of pipes in Pumpsim™.

Preset Values

Preset values provide a quick and convenient way to specify pipe characteristics and parameters that may be commonly used in the model.  Examples are pipe type, roughness, minor losses or valves.

The preset table also provides access to model primary and secondary layer names and colours, as well as water types, pumps and numerous other items used in Pumpsim™ simulation.

Any preset value which is changed will be applied to ALL pipes using that preset value.  For example if a model has 10 pipes using a resistance preset called ‘Rubber Flaps’ and the resistance for ‘Rubber Flaps’ is changed in the preset box, then ALL 10 pipes using rubber flaps will have the new resistance applied when simulation is next performed.

Most items can be deleted by selecting the entire row (or a selection of rows) and pressing DELETE, or by selecting and deleting individual values.  If a preset is currently in use, a warning may appear stating the fact, and the result it will have on the model.  Ideally, presets should not be removed if they are currently in use.

Sort Order

The sort order of the preset values displayed in the spreadsheet, and displayed in forms in other parts of the program can be specified.  All columns in the preset form can be sorted by Ascending or Descending by clicking the column header once or twice.  For example, resistances can be sorted by name (by clicking the ‘Resistance Name’ column header, or by value (by clicking the value header).  

In addition, row items can be manually sorted, by selecting the row and pressing the UP or DOWN arrow on the keyboard.  The sort order will be retained next time the form is accessed and will be saved with the file.

Accessing Presets

Preset items are accessed from the main SETTINGS menu, however most preset items can also be directly accessed from the edit forms by pressing .  When activated from an edit form, the currently used preset will be highlighted in the Preset form.

Preset Types

Materials

Different material can be set up. Entering the absolute Hazen Williams roughness (for pipe) and the manning roughness (for channel).

Pipes

Pipe presets allow a specific size of pipe to be set with pre-defined dimensions, material and nominal pressure.  See Pipes and Channels for more information.

Channels

Channel presets allow a specific size and shape of pipe to be set with pre-defined dimensions, material and nominal pressure.  See Pipes and Channels for more information.

Valves

Valves have to be predefined with a type, a flow factor (Kv) ( or flow coefficient Cv for imperial) value and the size. The type will change the equation that link the opening percentage and the flow factor at a opening. See Valves for more information.

Automatic valves

This category is for valves that will adjust during the simulation, such as Pressure Reducing Valve (PRV), Fix Flow,  Ratio Reducing or No Return valves. Info and size can be added as well. See Valves for more information.

Pumps

Present a summary of current pumps, and the basic characteristics of those pumps (eg diameter, water density for the curve etc).  While the pump curve data cannot be directly edited from this screen (you will need to go to the pump database function), the pump names can be changed as well as the other pump parameters.  Pumps can also be fully deleted from the model.  A read only column states the number of pumps in use in the model. See Pumps for more information.

Losses 2ways

Fitting connected to 2 pipes only, such as elbow or bend. A different resistance on the other direction can be set. If the reverse resistance is 0, it will consider both resistance equal.  See Junctions for more information.

Losses 3ways

Fitting connected to more than 2 pipes, such as tee or wye. See Junctions for more information.

Layer Primary, Layer Secondary, Fluids

The form shows current names for these items, and in the case of layers, whether they are being used or not.  The names can be changed at any time, and new layer names and water type names can be added.  Colour can be changed by clicking on the colour box.  There are currently 250 layers and 25 pipe types reserved for use.

Tank Exit

Specific resistance at the exit or entry of a tank (set on the Pipe Edit box).

Spray

The discharge coefficients used for the simulation. It can be calculated from an array flow/pressure by clicking on the calculator column. See Sprays for more information.


Fig. 5.1.2: The discharge coefficients calculated from array flow/pressure.

Nozzle / Diffuser

The resistance will be calculated after entering the angle and both diameters.  See Junctions for more information.