Step 1: Create a Gas Network Model

This step is the first in your journey to becoming an expert using the SAInt GUI. This tutorial series starts with creating a simple gas model to simulate a steady state gas network in SAInt. A network object contains and defines all the default and static properties of the system. The gas model will be comprised of a T-shaped network, a single supply point, a control valve, and three demand points.

1. Create a new network

Start by opening SAInt and creating a new default gas network. Go to the network tab and select New New Gas Network On Cartesian System as in Figure 1. This action will automatically open a window asking for a folder where to save the network. The newly created network file will share the same name as the folder. See next step for naming the folder.

Figure 1. Create a new default gas network.

2. Select network file location

By default, SAInt will open the Projects folder in SAInt’s user folder (C:\...\Documents\encoord\SAInt-v3\Project). Notice in the same folder the availability of sample networks developed for you by encoord. Create a new folder by right-clicking in the window and selecting New Folder or using the button "New Folder." Name the new folder Tutorial_GNET. Now with the Tutorial_GNET folder selected, click Select Folder in the bottom right-hand corner of the window, as shown in Figure 2. The Tutorial_GNET folder will be your project folder to host all the files related to our SAInt model.

Figure 2. File explorer folder selection.

3. New default gas network

A text box will show that the Tutorial_GNET network was created and successfully loaded into SAInt. Click OK and check the result in the map window. The new network already has two nodes and one branch, as shown in Figure 3. In SAInt, a network always has at least one branch and two nodes.

Figure 3. New default gas network Tutorial_GNET in SAInt.

You can change all basic properties of your network by modifying the items in blue in the Property editor. Select the network in the Model Explorer and open the Property Editor. If it is not there, just right-click and select it from the context menu.

For example, you could change the property reference temperature Tn from 0 °C (32 °F) to 15 °C (59 °F), so that the volume is reported using standard conditions instead of normal conditions.

The network and the active scenario available in the current SAInt GUI session are always shown on the left side of the status bar at the bottom of the screen. In our tutorial we have only network Tutorial_GNET as shown in Figure 3.

When you start a new project, remember to check the units of measure used. Right-click on bt01 step01 04 and select Settings. From there, use the Units tab and change the measurement and the currency units based on your needs. For example, you can easily switch between the International System and the Imperial System.