Contents
- Index
Simple System Tabulated Results
To view the results obtained with the data entered in the previous step, click the Tabulated Results button on the Toolbar. A new screen will appear.
The results screen shows calculation results for each lateral in the system, forcemain, pump discharge and dose volume.
Column Data
The first column gives the maximum orifice flow rate, in gallons/minute, for each lateral. In this example these values are all equal.
The second column shows the minimum orifice for each lateral. These numbers together mean that orifice flow rate along a lateral varies from a minimum of 1.38 gpm to a maximum of 1.40 gpm. The third column presents the difference between these flows as a percent, in this case 1.50% difference.
Column four tells the total lateral flow rate of 13.83 gpm for each lateral.
Column five shows the pressure in the manifold connected to the lateral. Recall that the specified residual pressure (The "Squirt") was set to 10 ft.
Column six shows the flow rate in each manifold section. The flow varies along the manifold as laterals are supplied.
The seventh column is the sum of manifold headlosses.
Column eight is important because it provides the calculated residual pressure at the end of each lateral. In general, it is a fundamental goal of pressure distribution system design to keep the difference between these pressures small.
the last column would provide orifice diameters for orifice plates if it had been specified in the input data. Because this example system is small and uniform in elevation, orifice plates are not necessary.
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On the bottom of the screen, Squirt presents Total Dynamic Head and Total Flow rate as well as velocity and headloss values for the forcemain and discharge piping. The value given for percent difference is different than those given in the columns (even though the number may be the same). The percent difference numbers given in the columns relate to the individual lateral, whereas the percent difference number at the bottom of the screen relates to the percent difference across all laterals.
Squirt will automatically calculate dose volumes based on pipe volumes by clicking on the slider, holding the mouse button down and dragging it to the right or left. When you do this you will be varying the multiplier of the lateral volume.
The "Print" button sends a screen shot to the default printer.
Next: Automatically Select Pumps
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