Building Mechanical Systems

Transcription

1 Building Mechanical Systems Creating custom Air Handling Units and placing them in your models: Creating devices such as air handling units (AHU) requires a few extra steps compared to simply adding items to the DataGroup System catalogs. AHU are stored as cells in the cell library HVACAHU.cel located in the Workspace\hvac\cells\AHU folder. There are multiple models inside this cell library arranged in associative pairs. The models in the associated pair are named using a certain format that is recognized by the application. One model stores graphical elements representing the device. The other half of the pair contains vector and text elements that determine the orientation and size of the cell's connection points. The default workspace provides 5 AHU models AHU01 AHU05. The number in the provided models refers to the number of duct work connections that the cell contains. Each AHU cell has a partner cell that is its name plus Conn. i.e. AHU01 and AHU01Conn. When creating new cells, the new model pair must follow this naming format. If the new device model is named My_AHU01, then the connection point model must be named My_AHU01Conn. Once the device model's physical connection and the connection point vectors are aligned and sized, the new air handling unit is able to be added to the DataGroup catalogs. The default AHU cells are stored in the cell library: HVACAHU.cel. In BBMS xm, the library is stored in the C:\Documents and Settings\All Users\Application Data\Bentley\WorkSpace\hvac\cells\AHU\ folder. In BBMS v8i, it is stored in the C:\Documents and Settings\All Users\Application Data\Bentley\MicroStation V8i (SELECTseries 1)\WorkSpace\hvac\cells\AHU\ folder. In the USACE workspace, it is stored at the workspace level in the \TS_Workspaces\USACE_Dataset_0xQx\Workspace\hvac\cells\AHU folder. You will need to use the connection cells as a basis for the creation your connection cells. You cannot create the vectors and size text on your own because they have special user data attached to them that the software need to work properly. You can create your new cells in a different library; however it will need to be stored in the same folder as the HVACAHU.cel library. Page 1 of 10

2 Creating a new AHU cell with Rectangular duct connections: 1. Open the HVACAHU.cel library or create a new library. 2. Create a new model in the library. 3. Set the following for your model a. Type: Design & 3D b. Name: PROJAHU1 c. Description: Project AHU 1 d. Check: Can be placed as a cell e. Check: Create a View Group 4. Click OK We have now created the model for our AHU Graphics: 1. Use this model to create the graphics for your AHU. a. You can copy in the geometry from one of the existing cells and modify it. b. You can use 3D models from a manufacturer; however, make sure that it is not overly detailed. If you get a model from the Google Warehouse or that was created for Autocad, make sure you drop it until it is no longer composed of nested cells. You will end up with a cleaner model if you trace these models in 3D in Microstation. c. Since these AHUs will be counted, not quantified, you can use the Microstation solids commands to model your new AHU. (The Draw on Solid tool gives you the ability to draw new faces and edges on a solid and the Modify Solid Entity tool gives you the ability to Push/Pull the solid into the shape you need. See the MicroStation Help for more info.) d. Make sure to apply an appropriate Family and Part e. Place a short piece of duct at each connection location. If your AHU also has plumbing connections, place short pieces of pipe at each plumbing connection location. Page 2 of 10

3 f. Place an active point with a heavy weight at the point where you want your ducts to connect to the AHU. (This will make the connection point easier to find after the AHU is placed.) g. You can add clearance spaces around your air handler to reserve space in the model for maintenance/filter replacement/coil replacement. In the unit pictured here, the boxes to the right of the unit are 2D and 3D clearances. The 3D clearances are solids that were placed as Construction class elements. This will allow them to be toggled off with the Constructions view attribute and will prevent them from extracting. The 2D clearances are on a separate level from the rest of the AHU. This allows you to toggle them on and off in the extraction. h. Since only the duct connections will automatically resize in an AHU, you may want to place text next to the plumbing stub outs that gives the size to the user. You should place this text as a construction element and on a non plot level. Page 3 of 10

4 2. To set the insertion point of the air handler: a. Select all the geometry in the model b. Start the Move command and pick the point on the geometry that you want to be the insertion point of the AHU. (AHUs that will be placed on the floor should have an insertion point on the bottom of the AHU. AHUs that are hung from above may be better off with an insertion point on the top of the AHU.) c. Give Accudraw Focus (F11) and type P d. This will open the Data Point Keyin Dialog. Type 0,0,0 in the dialog and hit enter. e. The geometry will now move so that the point you selected is at the origin of the model. With the geometry complete and in place, we now need to create the connection cell: 1. Create another New Model in the file. 2. Give the model the same name as your geometry model but with CONN on the end of the name. i.e. If your geometry cell is named PROJAHU1 then your connection cell will be named PROJAHU1CONN. The software requires the cells to be named this way in order for the tools to work. 3. Set the following for your model a. Type: Design & 3D b. Name: PROJAHU1CONN c. Description: Project AHU 1 Connection Points d. Check: Can be placed as a cell e. Check: Create a View Group 4. Click OK The connection cell is created; we now need to populate it: 1. Open the Models dialog box and the Reference file dialog box. 2. You can drag the geometry model from the models dialog into the Reference file dialog to attach it as a reference file. 3. Based on how many duct connections that your new AHU has, you should also attach the appropriate connection cell from the HVACAHU.cel library. If your AHU has 3 duct connections, attach the Page 4 of 10

5 AHU03CONN model; If you have 4 duct connections, attach the AHU04CONN model. BBMS will support up to 5 duct connections on a single AHU. Use the default settings for attaching the reference file. 4. In the reference file dialog, select the referenced connection model, right click and choose Merge Into Master from the pop up menu. Click in a view to complete the command. You now have connection point vectors in your connection model. There will be a vector for each of the duct connection points (numbers 1 5) and a zero vector for the insertion point of the cell (number 0). Each vector is composed of 3 lines starting at an origin and extending out to represent an axis. At the origin there is the vector number and the letter O. At the end of each axial line is the vector number and a letter noting the axis (X, Y or Z). There is also text for each duct connection that states the size of the rectangular connections. (W1=, D1=, W2=, D2=, etc.) 5. The Zero vector should already be at the origin of the model. This should also be the point you chose as the insertion point of your AHU cell. If it isn t at the origin: a. Select the entire Zero vector (it includes 3 lines and 4 pieces of text). b. Start the move command. c. Select the point where the 3 lines touch as the start point of your move. d. Give Accudraw focus (Type F11 or Type ESC then Spacebar) and then type P. e. This will open the Data Point Keyin Dialog. Type 0,0,0 (just typing,, also works) in the dialog and hit enter. f. The Zero vector will now move so that the point you selected is at the origin of the model. g. The Zero vector should be rotated to align with the coordinate axes in your design file. (X points in the positive X direction, Y points in the positive Y Direction, Z points in the positive Z direction) The connection point model vector and sizing elements must now be manipulated to align with and size the connections in the equipment model. We must move the connection vectors so that the origin of the vector is at the connection point of the duct. The alignment of the X Vector determines the duct direction away from the AHU. The Y Vector aligns with the direction of the width dimension of the duct and the Z vector aligns with the depth dimension of the duct. 6. We will now move and rotate the remaining vectors into position. a. Select the entire One vector. (Be sure to select all 3 lines and 4 pieces of text.) b. Start the move command. c. Select the point where the 3 lines touch as the start point of your move. d. Select the first connection point of point of the AHU geometry that you drew earlier. (This is easier if you placed the heavy weight active point at the connection point in the Page 5 of 10

6 geometry model.) Confirm that it moved to the correct location by looking in several views with different view rotations. e. With the One vector still selected, start the rotate command. f. In the Rotate dialog, set the method to Active Angle and the Angle to 90. g. Rotate the vector so that the X axis points in the direction of the duct away from the AHU. (You may need to rotate your accudraw cursor to accomplish this) h. Rotate the vector so that the Y axis aligns with the width dimension of the duct, while leaving the X axis pointing away from the AHU. (The Z axis will then automatically be aligned with the depth dimension of the duct.) i. Edit the sizing text W1= to match the width of the duct at connection point 1. j. Edit the sizing text D1= to match the depth of the duct at connection point 1. k. Repeat the above steps for the remaining connection vectors and their appropriate connection points. 7. Detach the Geometry model reference file. Your AHU cell is now complete. We will now need to add it to the Datagroup catalog for Rectangular AHUs. 1. Open a regular dgn file. 2. Open the DataGroup Catalog Editor. 3. Scroll down to appropriate RectangularAHU category (If your AHU has 1 connection then choose RectangularAHU1, for 2 connections choose Rectangular AHU2, etc.) 4. Expand the category and select one of the existing catalog items. 5. Right click and select Copy. 6. Change the name of the new item to match your AHU name. (It is best if this matches the cell name) 7. Change the CellSymbol field to your geometry model s name. 8. Make sure the CellLib field matches the name of the file where you stored your AHU cell. 9. Set the End1/width, End1/depth, End2/width, End2/depth, etc. to match the dimensions for the connections for your AHU. 10. Set any other parameters that you want to have set by default. 11. Save the Datagroup catalog. 12. (optional) To be able to easily copy your new AHU to another machine/network workspace/project, you will need to move your newly created datagroup item(s) to an separate xml file: a. Find the hvac_ahu.xml file in the datagroupcatalogs folder in your projects dataset. b. Save this file as a new name. i.e. Project_AHU.xml c. Open the new file in a text editor and remove the catalog items that you did not create. d. In the xml file the catalog items all start with a line like: <CatalogItem type="rectangularahus1" name="ahu1"> And end with the line: Page 6 of 10

7 </CatalogItem> When you are deleting a catalog item in the xml file, make sure that you start selecting the first line of the item and remove all the way through the last line of the item. XML files are very sensitive to syntax and if you remove too much or too little, then you risk crashing the entire datagroup system the next time you open BBMS. e. An xml file with a single new item in it will look something like this: <?xml version="1.0" encoding="windows-1252"?> <DataGroupSystem> <Version major="1" minor="0"/> <Units master="ft" sub="in"/> <CatalogItems> <CatalogItem type="rectangularahus3" name="ahu06"> <RefData> <Reference name="icon" value="ahu1.rsc"/> <Reference name="shape" value="1"/> </RefData> <Defaults> <Property definition="customparamahus" name="customparamahus/celllib" value="nwk_ahu.cel"/> <Property definition="customparamahus" name="customparamahus/cellsymbol" value="ahu06"/> <Property definition="customparamahus" name="customparamahus/electricaldia" value="2"/> <Property definition="customparamahus" name="customparamahus/endtype" value="fl-2;fl-2"/> <Property definition="customparamahus" name="customparamahus/fluidindia" value="2"/> <Property definition="customparamahus" name="customparamahus/fluidoutdia" value="2"/> <Property definition="customparamahus" name="customparamahus/straightlen1" value="2"/> <Property definition="customparamahus" name="customparamahus/totallength" value="30"/> <Property definition="customparamahus" name="customparamahus/viewdisplay" value="iso" ishidden="true"/> <Property definition="endspec3_111" name="endspec3_111/end1/@depth" value="84"/> <Property definition="endspec3_111" name="endspec3_111/end1/@width" value="24"/> <Property definition="endspec3_111" name="endspec3_111/end2/@depth" value="84"/> <Property definition="endspec3_111" name="endspec3_111/end2/@width" value="24"/> <Property definition="endspec3_111" name="endspec3_111/end3/@depth" value="30"/> <Property definition="endspec3_111" name="endspec3_111/end3/@width" value="24"/> <Property definition="insulationsymbology" name="insulationsymbology/@color" value="4"/> <Property definition="insulationsymbology" name="insulationsymbology/@levelname" value="level 2"/> <Property definition="insulationsymbology" name="insulationsymbology/@style" value="0"/> <Property definition="insulationsymbology" name="insulationsymbology/@weight" value="2"/> <Property definition="properties" name="properties/@airflow" value="supply"/> <Property definition="properties" name="properties/@insulation" value="fiberglass"/> <Property definition="properties" name="properties/@insulationthickness" value="0"/> <Property definition="properties" name="properties/@lining" value="zinc"/> <Property definition="properties" name="properties/@liningthickness" value="0"/> <Property definition="properties" name="properties/@material" value="aluminum"/> <Property definition="properties" name="properties/@pressureclass" value="low"/> <Property definition="properties" name="properties/@status" value="new"/> </Defaults> </CatalogItem> </CatalogItems> </DataGroupSystem> It is important that the header and footer lines (shown above in bold) remain in the file after your edit. f. Save your file in the datagroupcatalogs folder. Page 7 of 10

8 You are now ready to place your new AHU cell in a model. The AHUs are placed with a key in: BMECH PLACE COMPONENTBYNAME RectangularAHUs1 PROJAHU1 dsc=hvac Command Key in DataGroup Catalog Name Catalog Item Name Discipline Your exact key in will vary depending on the DataGroup Catalog that you placed your AHU in (RectangularAHUs1, RectangularAHUs2, RectangularAHUs3, RectangularAHUs4, or RectangularAHUs5) and the name of your DataGroup catalog item. You can use the key in directly to place the AHU cells or you can include them in the interface. You have several options: Create a cell selector: Since a cell selector can drive a key in when you select the cell button, these components can easily be included in a cell selector file. This is a quick way to distribute them through a networked office. (You will need to name the cell and the DataGroup Catalog item the same in order to successfully use a cell selector.) You can get more information on creating a cell selector file in the MicroStation Help File. Add them to the BBMS Task List: The BBMS HVAC Task List contains all of the HVAC tools. You can modify this task list to include your new AHU cells. o Select Workspace > Customize o Open the file BBMS_HVAC_Tools.dgnlib file located in (XM: C:\Program Files\Bentley\TriForma\interfaces\ Mechanical_Common\) (v8i ss1: C:\Program Files\Bentley\MicroStation V8i (SELECTseries 1)\TriForma\interfaces\Mechanical_Common\) folder o This file contains the location of our BBMS tools o In the Customize dialog box expand Application Tools o Navigate to the AHU Rectangular tools o Copy one of the Air Handling Unit tasks and Paste into the AHU Rectangular Tool box o Change the name to match your AHU. o Change the name in the Key in to match the DataGroup Catalog Item name of your AHU o If you want, you can supply a new bitmap(.bmp) file for the Icon of your AHU We know have our AHU unit in our tool box, now we need to add it to the actual task dgnlib file. o o Open the file BBMS_Tasks.dgnlib located in the C:\Program Files\Bentley\TriForma\interfaces\Mechanical\ folder From Application Tools in the left hand pane expand to locate your new tool s icon Page 8 of 10

9 o Expand the User Tasks in the Right hand pane and expand to the Equipment > Rectangular AHU Task o Drag your new tool from the Application Tools list on the left to the Rectangular AHU Task list on the right. The new AHU is now available in the Default BBMS interface on that machine. You will need to copy your interface dgnlib to other machines to share this change. Build a task set for your AHUs and share it across a network. To more easily share your AHU s but keep them in a task list, you can build your own task dgnlib and share it across a network. o Create a new dgnlib file in a network shared location. o Add this file to the configuration variable: MS_GUIDGNLIBLIST (This variable stores the list of DGNLIB files which store Tool, Task, and Menu customizations for your current session) This file will have to be listed in this variable in order you to use the Workspace>Customize tools. o Open the new DGN Library that you just created. o Select Workspace > Customize o In the Customize dialog box expand User Tools, then click on your dgnlib in the list. o Right Click and choose New Tool Box from the pop up list o Name your Tool Box (i.e. Custom AHUs) o In the Customize dialog box expand Application Tools / BBMS_HVAC_Tools.dgnlib / HVAC Placement / Rectangular / AHU Rectangular o Copy the Air Handling Unit tool that matches the and Paste into the AHU Rectangular Tool box o Paste the copied Tool into your newly created tool box at the top of the list. o Change the name to match your AHU. o Change the name in the Key in to match the DataGroup Catalog Item name of your AHU o If you want, you can supply a new bitmap(.bmp) file for the Icon of your AHU o On the Right hand side of the dialog, expand User Tasks o Drag your new tool box from the tool list and drop it on your dgnlib in the User Task list on the right. This will create a Task list with your new custom AHU as a task. o Future new Custom Tools that you create in your Tool Box can be dragged individually into the new Task list. o This new task will be accessible now in the Task Navigation tools in Microstation. Page 9 of 10

10 o If you want, can add this new task list to the Default HVAC task list in BBMS by editing the xml list that controls the display of the HVAC tasks. o o Open this file in a text editor: (XM: C:\Program Files\Bentley\TriForma\interfaces\MechanicalTasks.xml) (v8i ss1: C:\Program Files\Bentley\MicroStation V8i (SELECTseries 1)\TriForma\interfaces\MechanicalTasks.xml) Add your dgnlib to the <Dgnlibs> section for HVAC: <Task identifier="bbms_hvac" displayname="hvac" shortname="hvac" discipline="mechanical" autoopen="true"> <Dgnlibs> <Dgnlib name="bbms_hvac_tasks.dgnlib" /> <Dgnlib name="ahu_tasks.dgnlib" /> </Dgnlibs> </Task> o Save the file. o When you re open BBMS, the HVAC tasklist will include your new task set. o You can keep your dgnlib in a networked location and edit it as needed. Your users will see your updates if you include the dgnlib in the MS_GUIDGNLIBLIST variable from your network configuration and copy the MechanicalTasks.xml once to all of the local machines. You will not need to re copy anything to the local machines to include any future edits. Page 10 of 10