Water Age analysis results look incorrect for hydropneumatic tank

Product(s): WaterGEMS, WaterCAD
Version(s): 10.00.xx.xx, 08.11.xx.xx
Area: Modeling
Original Author:  Scott Kampa, Bentley Technical Support


After running a water age analysis, the water age results from a hydropneumatic tank looks incorrect. The results indicate a water age older than the model run itself.

Problem ID#: 73745


Hydropneumatic tanks are generally only used in transient analyses. While they can be used in WaterCAD as well, you will also likely need to use a small hydraulic time step (selected in the Steady State/EPS solver calculation options), since a hydropneumatic tank typically cycles relatively quickly. By using a smaller time step, the results should appear more accurate.

See Also

 How are surge tanks and hydropneumatic tanks used in WaterGEMs and WaterCAD models?

  • Created by Bentley Colleague
  • When: Wed, Aug 26 2015 9:49 AM
  • Last revision by Bentley Colleague
  • When: Tue, May 16 2017 3:07 PM
  • Revisions: 2
  • Comments: 0