Hi Amits, In the instant load rejection case, was there a positive initial flow through the orifice? Are you able to simulate this headloss by way of the standard headloss coefficient on a pipe, or perhaps a TCV node element configured as a Discharge Coefficient. Beyond this, yes, it would be best to provide a copy of the model files for review. There are two options for sharing your model on Communities. Either way, be sure to zip your files first. The first option is to attach to your reply on the forum using the Advanced Reply Editor (see link below and to the right of the reply box). If your data is confidential, use the instructions in the link below to send it via Bentley Sharefile. Files uploaded to Sharefile can only be viewed by Bentley. communities.bentley.com/.../7079.be-communities-secure-file-upload
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Forum Post: RE: Transients in downstream Surge Tank and TRT for a Hydropower scheme
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Forum Post: RE: Converting SewerCAD 5.6 to SewerGEMs V8i
Hi Mark, Thank you for the response. I'm sorry I wasn't very clear...I am able to get the program to recognize the file but after I click "Open" I get an error stating "Database format not recognized or read-only. It could not be opened." My assumption was that SewerGEMS wasn't recognizing it because there isn't a database but I could be wrong. Thanks again!
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Forum Post: RE: Converting SewerCAD 5.6 to SewerGEMs V8i
Francis, This may be related to this article: communities.bentley.com/.../25488.error-opening-old-model-file-database-format-not-recognized-or-read-only The article talks about old StormCAD files, but this may also apply to SewerCAD SWR files. Let us know if using the 32-bit version of SewerGEMS helps and we'll update the article accordingly.
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Forum Post: RE: Converting SewerCAD 5.6 to SewerGEMs V8i
That worked like a charm. Thanks Jesse!
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File: WaterGEMS V8i SELECTSeries 6 (08.11.06.113) 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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File: SewerGEMS V8i SELECTSeries 5 (08.11.05.113) 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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Wiki Page: Pattern loads in SewerGEMS are not being exported after exporting to SWMM. How are pattern loads at nodes in SewerGEMS exported to SWMM V5?
Product(s): Bentley SewerGEMS, CivilStorm Version(s): 08.11.xx.xx Environment: N\A Area: Modeling Problem Pattern loads in SewerGEMS and CivilStorm are not being exported after exporting to SWMM (File > Export > SWMM 5) . How are pattern loads at nodes exported to SWMM V5? Solution Depending on the way that the pattern is entered in SewerGEMS or CivilStorm, you will see the loading data applied in SWMM V5 in a couple of different ways. To export a SewerGEMS model to SWMM, go to File > Export > SWMM V5. After opening the resulting INP file in SWMM V5, you will double-click on the node to see the loading data. First, it is important to note that SWMM only supports a 24-hour pattern entered in 1 hour increments. If your pattern is set up with an hourly increment, you should see the pattern exported into the node as a Time Pattern, as shown in the screenshot below. In such a case, the pattern is retained and the base load is added to the loading data as the Average Value. You can view the pattern by clicking on the Edit Pattern button to the right of the pulldown menu. However, if the increment is not in one hour increments, the loading data will be loaded directly as a SWMM Time Series, as shown in the screenshot below. In this case, the base flow is already multiplied by the pattern multiplier you used in the SewerGEMS/CivilStorm pattern and is included as Time Series data. You can click the Edit Time Series button to the right of the pulldown menu to view the results. You will see that the values in the Time Series table are the same as if the base flow was applied to the pattern multiplier already. See Also Blocky stepwise pattern is displayed instead of a continuous smooth pattern that was entered when using the SWMM engine
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Wiki Page: Error while editing the Modelbuilder.xml file with the third party application
Applies To Product(s): Bentley WaterGEMS, Bentley WaterCAD, Bentley Hammer Version(s): 08.11.05.61 Environment: N/A Area: Original Author: Sushma Choure, Bentley Technical Support Group Problem When trying to edit the Modelbuilder.xml file with the third party application like “HM Manager”, to avoid having to configure the source file connections in the Modelbuilder tool of WaterGEMS SS5, I am getting error as shown below. “Error Loading Connections: Object reference not set to an instance of an object.” Background It could be done without any error with WaterGEMS SS4, but WaterGEMS SS6 is giving this error. Solution This is related to the Modelbuilder.xml file The file format did change a bit between SS4 and SS5 versions of WaterGEMS (at the top of the file there is a version number; it increased from “9” to “10”). <StorageElementHeader Id="1" Version="10" Adding the text highlighted in red will resolve the issue (You can write this additional text even in the SS4 file). <ExternalDatabaseLink … SpatialOptionSpatialConnectivityTolerance="1" SpatialOptionHasSpatialReference="false" SpatialOptionSpatialReference="NONE" SyncOptionAddElements="true" …
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Forum Post: Energy consumption comparison - Fixed speed pump vs Variable speed pump in SewerGEMS
Hello, I am looking for a method to compare the energy consumed by a fixed speed pump and a variable speed pump in SewerGems. I found the option in WaterGems, but not in SewerGems. Any advise? Regards Nishadi
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Forum Post: RE: Energy consumption comparison - Fixed speed pump vs Variable speed pump in SewerGEMS
Hello Nishadi, Currently that is not possible for the storm-sewer products, like we have option for that in water products. We have filed an enhancement for this, the reference number is #347978, which has been approved and shall be implemented soon. Regards, Sushma Choure.
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Wiki Page: Using Network Navigator's Powerful Queries
Part of the Hydraulics and Hydrology Video Series ( more info ) Do you use manual methods of locating and selecting elements in your Hydraulics and Hydrology products? Did you know that the Network Navigator tool contains powerful queries to help you locate and select elements to assist in tasks such as post-model building cleanup? To learn more, watch this short video that explains how. The video covers the queries "Find Disconnected", "Dead End Junctions" and "Failed Fire Flow Constraints". (Please visit the site to view this video) Applicable products/versions: WaterCAD, WaterGEMS, HAMMER, SewerCAD, SewerGEMS, CivilStorm, StormCAD, PondPack V8 XM, V8i and higher This video is part of a growing library of useful information designed to provide effective tips and information about time-saving product features within Bentley’s Hydraulics and Hydrology products. Be sure to check back frequently to view the latest video. Better yet, subscribe to this blog by turning Notifications On. Sushma Choure, Technical Support Engineer, Intermediate Bentley Systems, Inc.
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Forum Post: RE: Energy consumption comparison - Fixed speed pump vs Variable speed pump in SewerGEMS
Thanks for the information Sushma.
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Forum Post: RE: Energy consumption comparison - Fixed speed pump vs Variable speed pump in SewerGEMS
At present, the best way to analyze energy cost is with WaterCAD/WaterGEMS. There are some great tools there for energy calculations. From my experience, a constant speed station will almost always have a lower energy cost than a variable speed station when there is a single pump station and force main. This is because a constant speed station will pump at an efficient operating point or be off. On the other hand, a variable speed station will run at a wide range of efficiencies, some of which will be bad. There is also more chance of solids build-up due to low velocity in a varible speed station. However, if you have a force main with multiple pump stations connected to it, the system head curve can vary widely. In those cases, having a variable speed pump, which can speed up when several other pumps are running and the HGL is high and slow down when it is running alone, can reduce the pump head and save energy. While those are general statements, it is best to run through life cycle cost analysis to make your decision. Energy cost is the largest component in life cycle cost and is the most difficult to calculate manually. That is where you model is a big help.
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File: SewerCAD V8i SELECTSeries 5 (08.11.05.113) 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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File: StormCAD V8i SELECTSeries 5 (08.11.05.113) 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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File: CivilStorm V8i SELECTSeries 5 (08.11.05.113) 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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File: WaterCAD V8i SELECTSeries 6 (08.11.06.113) 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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File: HAMMER V8i SELECTSeries 6 (08.11.06.113) 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: RE: Energy consumption comparison - Fixed speed pump vs Variable speed pump in SewerGEMS
I would respectfully disagree, Tom. Especially in the case of sanitary stations with multiple pumps, the peak head condition the pumps are designed for is often much greater than the average daily conditions due to high friction losses. Larger pumps are often cheaper than bigger force mains so you will see peak design velocities of 6 fps and considerable friction losses. I agree that poor controls often can result in VFD pumps operating at a poor operating point and negating savings, but in most cases well controlled VFD pumps could still save a significant percent of energy.
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Wiki Page: Why do risers require weir and orifice information?
Product(s): Bentley PondPack Version(s): 08.11.01.56 Environment: N\A Area: Modeling Subarea: N\A Why do risers require weir and orifice information? Situation 1: I'm designing an inlet box riser that has an orifice, but no weir, so I entered a weir length of 0.00ft. User Notification: "The weir length 0.00 is invalid. The length must be greater than 0.00 ft." Situation 2: I'm designing a stand pipe riser riser that has a weir, but no orifice, so I entered an orifice diameter of 0.0ft. User Notification: "The stand pipe diameter 0.0 in is invalid. The diameter must be greater than 0.0 in." Situation 3: I'm designing a riser that has a weir, but no orifice so I entered an orifice area of 0 (for an inlet box riser). User Notification: "The orifice area 0.0 ft^2 is invalid. The area must be greater than 0.0ft^2." Background The weir length represents the perimeter of the top of the box where water is spilling over as the pond headwater elevation first starts exceeding the crest. The field orifice area is for the hole on top of the riser. Basically when the water surface goes just a little bit above the top of the riser, it's acting as weir flow because it's spilling into the hole at the top. However, there comes a point when it transitions to orifice flow, when the hole at the top is fully submerged and at that point, it's just orifice flow, with the area value being the area of the hole at the top (pointing down into the ground). Any orifices on the side of the box will have to be entered as separate orifice items in the outlet structure. Reason The orifice parameters in the riser component refer to the hole at the top of the riser. As the pond water level reaches the crest of the riser, it first spills over and into the riser as weir flow. However if the riser is completely submerged (at higher water surface elevations), the flow into the top of the riser acts as orifice flow, which is why you must enter those parameters. If you have orifices on the sides of the riser, those would be entered as separate orifice components, with the downstream ID set to the component that the riser discharges to (usually tailwater or a culvert). For more information on this, see quick start lesson #1, which covers risers with side perforations. Original Author: Craig Calvin
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