The answer to your basic question is that there is no error. The steady run is showing you that you have more capacity in your pump than the peak demand. That's good. Given that the demand will usually be less than the peak demand, there will be times when the tank becomes full and you will want to turn the pumps off. Otherwise you will overflow the tank. You need an EPS run to analyze water level fluctuations and pump controls.
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Forum Post: RE: Change in flow in pipes than pump flow.
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Forum Post: RE: Sewergems - Model a storm detention tank
Hello Gustavo, This sounds like you are trying to model a wet well. You can model gravity flow that drains to a wet well. The wet well will then be attached to a pump that will deliver flow through a pressure subnetwork to either an outfall or a manhole. I would recommend taking a look at the SewerGEMS sample model Sample-3.stsw. This shows a set up where the pressure subnetwork drains into a manhole, which is conveyed downstream to an outfall. You can find the sample models by browsing to C:\Program Files (x86)\Bentley\SewerGEMS\Samples. Regards, Scott
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Forum Post: RE: Change in flow in pipes than pump flow.
As the pattern for tank inlet through pumping is not available (pumping is 22 hours per day), I think i should model the elevated reservoir (i.e tank) as junction with a demand mentioned above and run the system. What suggestion you give? Thank You Sir!
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Forum Post: RE: Change in flow in pipes than pump flow.
Hello Videet, You can try modeling the elevated reservoir as a tank or a junction with the demand pattern specified. If you model the elevated reservoir as a tank, you can specify controls to turn your pump on and off based on the water levels in the tank. As Tom suggested you wouldn't want the tank to overflow when demand is less. Creating Controls - Conditions, Actions, and Control Sets Hope this helps.
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Forum Post: RE: Sewergems - Model a storm detention tank
Hello Gustavo, In addition to Scott's response, you can also try to model the detention tank as a pond. For the pond element you can specify the storage or volume that can be held. The outflow can be connected to the Pond Outlet element and you can have an overflow weir defined to divert excess flow. Hope this helps.
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Forum Post: RE: Change in flow in pipes than pump flow.
The answer goes back to the question of "why are you analyzing the system?" Is this an existing system or is it design of a new system? Are you sizing the pipes and tank or selecting the pump? Are you trying to operate an existing system better? How much confidence do you have in your demand forecast? How will demands change in the long run? What will happen during a power outage? What are the water use patterns of the customers? The answers to these questions will determine how you analyze the system with your model.
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Forum Post: Help me to redo the configuration of the hydropneumatic tank and air valve with triple acting (transition volume, diameter of the different orifice ...)?
communities.bentley.com/.../Transfert-SP1-_2800_with-Protection_2900_.rar
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Forum Post: RE: Sewergems - Model a storm detention tank
Hello Scott and Joshi: Thank you very much for you answers. I´m going to try the model according yours tips. I will tell you how it works. Thank you. Regards.
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Forum Post: RE: Help me to redo the configuration of the hydropneumatic tank and air valve with triple acting (transition volume, diameter of the different orifice ...)?
Hello Anouar, The first thing I would recommend is reviewing the hydropneumatic tank and air valve technotes. This has general information on the setup of the elements. I have some general recommendations. First, you have check valves on the pipes connected to the hydropneumatic tanks. I'm not sure this makes sense unless they actually exist in the system. This will stop the hydropneumatic tanks from filling, which may have an impact on the results. Other things to look into are the ratio of losses and minor loss coefficients where you can try adjusting these values to see how the system reacts. For the air valves, you can try adjusting orifice diameters to see how these are impacted. You also have the option to include manufacturer air flow curves, if that is something you have access to. The air valve technote linked above has some information on this. The last thing I would recommend is adding the air valves and hydropneumatic tanks as report points. This is done by opening the transient calculation options and adding these points as report points. You can then view results for these points in the Time History graph of the Transient Results Viewer. Regards, Scott
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Forum Post: Is there a diffusivity rate for Chloramines?
I am working on a project modeling a water system that utilizes Chloramines for disinfection. I can easily find Diffusivity rates for chlorine but not chloramines. Does someone have a general diffusivity rate for chloramines?
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Wiki Page: "Setup has detected that the 32-bit version of Microsoft Office is installed..."
Applies To Product(s): StormCAD, WaterGEMS, WaterCAD, SewerGEMS, SewerCAD, CivilStorm, HAMMER Version(s): 08.11.03.xx and earlier Environment: Windows 7 64 bit Area: Modeling Original Author: Scott Kampa, Bentley Technical Support Group Problem Description The following message appears during installation: "Setup has detected that the 32-bit version of Microsoft Office is installed. Due to a prerequisite conflict, this combination is not supported with the 64-bit version of >PRODUCTNAME PRODUCTNAME PRODUCTNAME< as 32-bit or "Cancel" to exit setup." Steps to Resolve This message indicates that an incompatible version of Microsoft Office was detected, which prevents the 64-bit version of the program from installing on your 64-bit operating system. This may or may not actually be a problem for you, depending on what you need to do. By pressing "OK", the setup will continue and only install the 32-bit version of the product. If you need to integrate with the 64-bit version of AutoCAD, then you must install the 64-bit version of our product (as the 32-bit version won't integrate). In this case, you will need to address this issue, then reinstall. Otherwise, you will only be able to use the Standalone (or Microstation integrated) version of the product (as 32-bit). Starting with the SELECTseries 4 releases of the products, they will automatically install as a 64-bit application (as they use SQLITE instead of Access for the model database). So, upgrading is recommended. For SELECTseries 3 or earlier, your options after receiving the information message are: 1) Click OK to proceed and use the 32-bit version that will be installed. This should be fine if you only use the MicroStation integration, ArcGIS integrated or Standalone version of the product. 2) Cancel the setup and upgrade to the 64-bit version of Office (such as Office 2010). Then, you'll be able to install the 64-bit version of the program, which will integrate with the 64-bit version of AutoCAD. 3) Use a virtual machine to keep the programs separate. For example you could use "XP Mode" in Windows 7 and install your 32-bit Office there, uninstall it from your main computer, then you'll be able to install the 64-bit version of our software. 4) Cancel the setup, uninstall Office, then try again. You should then be able to install the 64-bit version of the program, which will integrate with the 64-bit version of AutoCAD. You'll also have the 32-bit Standalone/MicroStation/ArcGIS versions available. This step is not recommended, as it may cause issue with the usage of Microsoft Office. For a bit of background information: V8i SELECTseries 3 and earlier requires that the Microsoft Access Database Engine be installed as a prerequisite. This is used for accessing MDB databases, which the models are stored in. When installing the program on a 64-bit operating system (typically Windows 7), the program will normally try to install the 64-bit version of it. The 64-bit versions of our software then requires the 64-bit version of the Microsoft Access Database engine component. If you happen to have a 32-bit version of Microsoft Office installed, then the 32-bit version of the Access Database Engine will also be installed. Unfortunately due to a Microsoft issue, the 64-bit version of the Access Database engine cannot be installed in the presence of the 32-bit version (they cannot coexist). This is why you get the message in question.
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Forum Post: RE: A third scenario is not displayed in a Custom Report Transient Results Time History Graph in HAMMER.
Thanks Scott, isolating the model files did the trick! However, now I have an issue with the location ID not displaying on top of the graph. Did you experience this in your sample model as well? Thanks, -Joel
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File: PondPack CONNECT Edition (10.00.00.01) Readme
This document contains installation and licensing details and a list of what's new in this release. Note: you will need to be signed in to Bentley Communities in order to see the Download button.
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Forum Post: WaterCAD Gray Background Upon Startup, Elements in Layout are not visible
Yesterday I built a model in WaterCAD CONNECT and it saved just fine. Today when I went to open the file the gray background appeared and blocked out all the elements in the model. Other coworkers were able to open the model in their WaterCAD and all elements were functional. I uninstalled and reinstalled both WaterCAD CONNECT and V8i series 6. I also played around with the View options and nothing worked. I followed the instuctions for this gray screen issue and it brought no solution https://communities.bentley.com/products/microstation/w/microstation__wiki/12787/grey-screen-when-opening-files Please see the photo below for the screen that appears when I open the model I created. You can see the reservoir properties listed in the properties window but it is not viewed in the Model Extent.
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Forum Post: RE: WaterCAD Gray Background Upon Startup, Elements in Layout are not visible
Hello Nicholas, Try the following to see if it helps. Close the model and open File Explorer. Browse to where the model is saved and create a new folder. Copy just the .wtg and .wtg.sqlite files into the new location, then open the model from the new folder location. If this helps, the issue was likely related to one of the supporting files, such as the .wtg.dwh file. You can also try deleting the .wtg.dwh file to see if this help with the issue. Regards, Scott
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Forum Post: SWMM 5.1 Results differ from Sewergems SWMM Calculation Results
I am getting a -21.0% Flow Continuity Error in my Sewergems model so I exported it and ran it in the SWMM 5.1 software and got a -0.16% Flow Routing Continuity Error. I'm wondering what could cause such a drastic change in results. A few notes. The model has two ponds modeled and one outfall. One inlet that is upstream of the pond has a -800.76% continuity error for it's surface node (in sag inlet - "Node 828f_Surface). Obviously this is causing the most problems but I'm not sure how to fix it since the inlet is not overflowing or surcharged. The rest of the nodes listed in the "Highest Continuity Errors" section within Sewergems are in the 9-36% range. I am using Sewergems CONNECT Edition Update 1 (10.01.01.04) within Microstation V8i SS4 and EPA SWMM 5.1.012. I will try to upload the "Outfall D6_NEW" file for reference.
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Forum Post: RE: SWMM 5.1 Results differ from Sewergems SWMM Calculation Results
To add, I just tried making the orifice in my pond outlet structure 2" smaller and it reduced the overall "flow continuity error" in Sewergems to -9.3%, but the "Node 828f_surface" error actually increased to -1061.70%. This might help the overall error, but I'm still wondering why the SWMM program would solve the same model and have such a smaller error as well, with my original input values .
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Forum Post: RE: SWMM 5.1 Results differ from Sewergems SWMM Calculation Results
Hello Jared, Have you tried setting the SWMM calculation options to reduce your continuity errors? Often when designing large or complicated models it would give somewhat higher continuity errors or unstable results. Here is the relevant article in this regard; Troubleshooting unstable SewerGEMS model results using the Explicit SWMM Solver Hope this helps.
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Forum Post: RE: Is there a diffusivity rate for Chloramines?
Hello Sarah, One source of values for diffusivity rate for chloramines is the Perry's handbook of Chemistry or CRC Tables. The below wiki talks about this in detail, please go through it. Mixing Chlorine and Chloramines
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Forum Post: RE: Cybernet to Watergems
Hi Jesse, I'm back to working on this project. It ended up getting put aside for a while. I never ended up downloading your upload because I couldn't find your email and I had bigger issues at the time. I found it in my spam folder, but the link says it is invalid. It says "The link you are trying to access does not exist" Could this be because of the amount of time that has passed? My other thought is that I am not logged into the system, because when I click the option to go back to sign in, it does not accept my password. It also won't send me my password. My password works to login other places though. Thank you for you assistance (again)
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