Changing transient solver accuracy and max trials
Product(s):
HAMMER
Version(s):
10.XX.XX.XX, 08.11.02.31 and greater
Area:
Calculation
Problem
How can you change the Accuracy and Maximum Trials for the transient calculation engine?
Transient results appear to be unstable…
Velocities in network for different pumps
Hello
I have made a model in Watergems with some pipes and junctions, a reservoir and pump after that. I wanted to select between two pumps. When I put each of the pumps in the system and run it, pressures in the junctions change but velocities of the…
Booster Pump Station Scenario Alternatives
I am needing help deciding which alternative to change. I want to create a scenario where I add in a booster pump station within my system. I might try to add in an alternative to Active Topology. If I do this, will the inactive pumps stop the flow in…
How to develop a pump curve for a well pump when the only information I have is the well capacity(MGD)? [WaterGEMS]
I have a model for a city(In WaterGEMS) with multiple Groundwater/Surface Water/Repump stations. Apparently, one of the Groundwater well pump has incorrect pump curve (head vs flow).
I need to develop a new pump curve with the only info on hand being…
Water drawn through pump after shut down?
Hello,
I am modeling a wastewater forcemain with a sudden power failure and I noticed that the flows after a pump shutdown are stepped. The flow decreases at the pump, but as the transient wave moves away from the pump and negative pressures are experienced…
Using patterns to control pumps or reservoir HGL over time
Product(s):
WaterGEMS, WaterCAD, HAMMER
Version(s):
V8i, CONNECT Edition
Area:
Layout and Data Input
Problem
How can I use patterns to change the pump speed over time (or turn it on/off based on time), or reservoir hydraulic…
outflow of pumps or reservoirs in model is unequal from reality
Hi
I have encountered some times this problem. I have a flow in the existence pipe of a reservoir or pump in model. I know the demand consumes in the network and use that in junctions. I have measured the outflow with a portable flowmeter or a fixed…
Modeling Variable Speed Pumps (VSP) and Variable Speed Pump Batteries (VSPB) In Storm and Sewer Products
Product(s):
SewerGEMS, SewerCAD, CivilStorm
Version(s):
CONNECT Edition, V8i
Area:
Modeling
Problem
How to model a Variable Speed Pumps (VSP) and a Variable Speed Pump Battery (VSPB) in the storm and sewer products?
Background…
User notification: "Element not included because it is Closed"
Applies To
Product(s):
HAMMER
Version(s):
10.00.xx.xx, 08.11.xx.xx
Area:
Modeling
Original Author:
Scott Kampa, Bentley Technical Support Group
Problem
After computing the transient analysis, a user notification…
Pump's relative speed control rounded to 1,00
Hi guys,
I try to use SCADA Connect simulator to import VSP relative speeds into my model. It works perfectly except for 2 pumps. The relative speed gets rounded to 1,00 although the control indicated the correct value. I have several time-series…
SCADA connect pump_status importing problems
Hi guys,
I try to build a robust SCADA connect model, but faced some very weird issues:
Importing historical overrides provides me exactly the opposite controls: When my SCADA data indicates status=1 (pump is ON), the import function adds a control…
User Notification: Multiple point pump curve contains non-increasing flow points.
Product(s):
WaterGEMS, WaterCAD, SewerGEMS, SewerCAD
Version(s):
08.11.XX.XX and 10.00.00.XX
Area:
Layout and Data Input
Problem
When computing or validating the model the following user notifications appear.
Multiple…
After computing the model, the pump efficiency results are listed as N/A
Applies To
Product(s):
WaterGEMS, WaterCAD
Version(s):
CONNECT Edition, V8i
Area:
Output and Reporting
Problem
After computing the model, the pump efficiency results listed as N/A in the pump properties or the pump…
Find if pump operates off of the pump curve during an automated fire flow scenario
Product(s):
WaterGEMS, WaterCAD
Version(s):
CONNECT Edition, V8i
Area:
Output and Reporting
Problem
Is there a way to see if a pump is operating off the pump curve during an automated fire flow scenario?
Solution
…
How do I find the Total Dynamic Head (TDH)?
Product(s):
WaterGEMS, SewerCAD, WaterCAD, SewerGEMS, CivilStorm
Version(s):
CONNECT Edition, V8i
Area:
Calculations
Problem
How can I find the Total Dynamic Head (TDH) of one or more pumps?
Solution
The Total Dynamic…
Why is the “lag pump count” field not available when selecting Fixed Flow as the “VSPB Type”?
Product(s):
WaterGEMS, WaterCAD, HAMMER
Version(s):
08.11.XX.XX and 10.00.XX.XX
Area:
Layout and Data Input
Problem
Why is the “lag pump count” field not available when selecting Target Flow as the “VSPB Type”?
How can the…
Modeling a Connection to an Existing System
Product(s):
WaterGEMS, WaterCAD, SewerGEMS, SewerCAD
Version(s):
V8i, CONNECT Edition
Area:
Modeling
Original Authors : Scott Kampa, Jesse Dringoli, Tom Walski
Background
If you are modeling only a portion of a larger…
Efficiency Curve vs. Wire-to-Water Efficiency Curve
Product(s):
WaterGEMS, SewerGEMS, CivilStorm, StormCAD, PondPack, SewerCAD, HAMMER, WaterCAD
Version(s):
08.11.XX.XX, 10.XX.XX.XX
Problem
What is the difference between an efficiency curve and a wire-to-water efficiency curve…
How do you associate a pump to a pump station?
Product(s):
WaterCAD, WaterGEMS, SewerGEMS, SewerCAD
Version(s):
08.11.XX.XX, 10.XX.XX.XX
Area:
Layout and Data Input
Problem
How do you associate a pump to a pump station?
What is the difference between a pump…
Simulate bypass flow through a pump that is turned off
Product(s):
WaterGEMS, WaterCAD
Version(s):
08.11.XX.XX, 10.XX.XX.XX
Area:
Modeling
Problem
When modeling a pump in WaterGEMS, is there a way to have the pump turn off, but still allow flow through the pump. Problem…
03. How can I include pulsation forces from piston type pump to piping using AutoPIPE?
Applies To
Product(s):
AutoPIPE
Version(s):
ALL;
Environment:
N/A
Area:
Modeling
Original Author:
Bentley Technical Support Group
Date Logged & Current Version
Dec. 2016 10.01.00.09
Problem:
…
06. What is the simplest way to check a piping model with load caused by a pump's vane frequency when using AutoPIPE?
Applies To
Product(s):
AutoPIPE
Version(s):
ALL;
Environment:
N/A
Area:
Modeling
Original Author:
Bentley Technical Support Group
Date Logged & Current Version
Dec. 2016 10.01.00.09
Problem:
…
Using the Scenario Energy Cost tool in SewerGEMS, SewerCAD and CivilStorm
Product(s):
SewerGEMS, SewerCAD, CivilStorm
Version(s):
10.00.00.40 and later
Area:
Modeling
Overview
This article explains how to use the Scenario Energy Cost tool in SewerGEMS, SewerCAD, CivilStorm CONNECT Edition (10.00…
HWS resistance projects
Test projects demonstrating:
twin pipe outlet connections will include extra outlet resistance when sizing circulation pumps.
single pipe outlet connections will not include extra outlet resistance when sizing circulation pumps.
These files…
Extreme and Inaccurate initial flow (at time t=0)
Product(s):
SewerGEMS,CivilStorm,SewerCAD
Version(s):
08.11.XX.XX and later (features vary)
Area:
Calculations
Problem
After computing a model, there are inaccurate flows and velocities being reported. For example…