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Don Wallace

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  1. Pumpsim DESIGN (version 1.0.0.4636 or later) has been updated to improve the way a positive displacement pump is added in Pumpsim DESIGN Positive displacement pumps operate similarly to a fixed flow pump providing certain flow of fluid per pump stroke. I have attached to this post a short video on setting up positive displacement pump in the Pumps form of Pumpsim DESIGN. I have also added a simple model which has a positive displacement pump called "ACME pump" Open the Pumps form form the main menu selecting Tools -> Pumps On the Pumps form click on the "Add Positive Displacement Pump" Then add a Name for the pump add the Rated Flow which should be given by the manufactures specification. This figure is required and needs to be in the units used for quantity in the model. add the pump operating RPM. This is the RPM of the pump cylinder/s not the pump motor RPM. This should also be should be given by the manufactures specification. If this figure is not available you can just add 100 as figure is only use to figure out the flow per revolution. add the pumps motor power if available (is optional). This is just used it calculate power consumption. Click OK and now the pump can be assigned to an individual pump in the model When the positive displacement pump is selected for a pump the Rate Flow and Operating RPM is displayed for it operating at 100% Changes to any of these 3 values will recalculate the other 2 values. When a flow simulation is run on the model the positive displacement pumps will produce the rate flow of fluid. For multiple positive displacement pumps you will need to create an individual pump for each instance. Setting up Positive Displacement Pump.wmv Positive Displacement Pump.psm
  2. Pumpsim DESIGN files will grow as the model is updated and pipes and fittings added. One component that will also quickly increase the size of the file is reference graphics that can be imported into the file. When working with mining models for Pumpsim DESIGN it is common to import reference layers from external applications that create DXF files. Using follow methods of reducing the size of reference layers in Pumpsim DESIGN model files we have been able to successfully reduce the size of the files to 20 to 30 percent of their original size while still containing useful reference layers. We would recommend users with files larger than 10MB with significant reference layers use this approach. The reference layers are displayed in the Reference Layer tab of the Display manager form. Reference Layers As more Reference Layer are added the file size will increase and it will take longer to load and save the file. There are 2 types of reference layers. Solids - these consist many triangles used to display a solid shape. Often the density of triangles in the layer can be reduces (simplified) without dramatically affecting the look of the reference layer. Lines - these consist of just line and can not be simplified (however they are not as large as solid layers) In Pumpsim DESIGN we have 2 ways of "Simplifying" reference layer that will lead to an overall reduction in the size of the Pumpsim DESIGN model file. Before "Simplifying" reference layer it is recommended that you make a backup of your model file. 1. Simplifying during the import of the DXF layer. From the main menu select File -> Import and select the DXF file to import In the "Simpilfy Options" section of the from set the "Simplify %" - recommended a value of 50 - 20%. You may want to experiment with this value. The value set will be remember for next time you import a DXF file. The simplification of the reference layer will result in creating the set percentage number of triangle that what would have been created if it was left at 100%. That is is the reference layer would have been created with 50 000 triangles and the Simplify % was 30 it would create the layer with 15 000 triangles. 2. Simplifying existing reference layer using the Filter tool. On the Display manager switch the Reference Layers tab. This will display all reference layer with a size of the layer in its description You may individual select or multiple select layers with a large size (>1.0 MB). It is recommended that you "Simplifying" a single reference layer by selecting all layers off (black light bulb button) and then just selecting a single layer. From the main menu select Tools -> Filter to open the Filter form Switch to the "References" tab. Set the "Simplify %" - recommended a value of 50 - 20% and leave Replace Layers checked on. Click on the "Simplify" to run the process of reducing the number a triangles in the selected layer. Check the updated reference layer stills looks acceptable before continuing a saving the updated model file. You may re-run the "Simplifying" of a reference layer a second time on a layer, but if you do this it would require increasing the "Simplify %" for the second pass. Point of caution - do not attempt to reduce the reference layer size to far as it will affect how the reference layer appears in the graphics window.
  3. Hi Kingsley Thanks for raising this issue. I will investigate what is going on and report back here about it Don Wallace Howden Ventsim
  4. Hi Michal and Monika The latest update of Ventsim minor release 5.2.8.4 at https://ventsim.com/download/minor-releases/ now addresses the issue raised in this topic on merging Deswik files. The merging process now maintains the original airway in there original position and places the merged airway correctly in reference to the original airway. The custom tunnel profiles of the original and merged file our merged and the custom profiles used in the merged model are now set correctly. Regards Don
  5. Hi Michal We have fix the issue with merging to ensure the merged airway are in the correct location and the exist airway remain at their original locations. There will be an minor release update today or tomorrow that includes this fix. Will post in this topic when the update is available. Regards Don
  6. Hi Kevin We have made a minor release that includes changes to the Profile Builder that will address the issues we have discussed. This can be downloaded https://ventsim.com/download/minor-releases/ and selected the VentSim™ Design - Version 5.2.7.1Minor Release Draw your tunnel profile by selecting the pen button and placing dots on the blank canvas. Alternatively load an image onto the canvas via the image button and dot trace around the image. Select the center point position from the center point dropdown. Options are middle, top, bottom, left, right. For a ‘half’ profile use left or right Then click on the Apply button. This will transform the points to a 1:1 aspect ratio and the image will fill the canvas area. The changed image and points will be displayed at this stage. Click close and the profile is ready to use. As the profile is adjusted to a 1:1 aspect ratio you can set the tunnel Width and Height values and the correct Area will be calculated and tunnel will by drawn in Ventsim at the correct aspect ratio to give a reasonable visual appearance of the profile. Regards Don Wallace
  7. Hi Kevin Thanks for your feedback on the Custom Shape Builder. There does appear to be some issues with this new control. I will look at addressing these and get a fix available to you tomorrow. Regards Don
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