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Thread: Flow Rate Calculation

  1. #1
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    Flow Rate Calculation

    Is their anyway to change the calculation method that revit uses to calculate Cold water flow rates? All the "architecture" already exists for the current "Fixture Units" method, I would just need to change the actual calculation used to suit the British Standard.
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  2. #2
    Forum Addict josephpeel's Avatar
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    Yes its possible.. but you will need to do a bit of C# programming and make an add in.
    There is the possibility to replace the pipe/duct calculation servers with your own. Theres some info on this here;
    I managed to get this working for tapwater using dutch 'Tapeenheiden' instead of Fixture Units.

    It works, but the only examples I could find where from 2013 and I had to strip it right down to the minimum because so many things where old and no longer worked with the API. I dont have a lot of programming experience so its amateur stuff... so feel free to have a look and copy it if you like.
    Its a Visual Studio 2015 project. I suggest you download the full example too and start with that for your own calcs.

    (BTW the actual WFU calculation is ridiculously simple, it just looks up a table. If you can get the rest of the add in working, just replace that bit with your own formulas.)

    I gather from the lack of available examples that almost no one has tried this...


    EDIT: Als je wil toch de berekeningen gebruiken volgens NTR3215, je zal een geschikte family moeten maken. TE SE en constant debiet zijn door hetzelfde WFU parameter gestuurd als volgt;
    Attached Thumbnails Attached Thumbnails Flow Rate Calculation-usermepcalc.jpg  
    Attached Files Attached Files
    Last edited by josephpeel; August 10th, 2017 at 12:52 PM.
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  3. #3
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    I have downloaded your attached file thank you. How do I install this/add it into Revit?

  4. #4
    Forum Addict josephpeel's Avatar
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    Put the compiled .addin and .dll files in the folder C:\ProgramData\Autodesk\Revit\Addins\2016 (Or other version.)
    Then when you open revit it will run as a service (There is no AddIn button) and you can select it in Mechanical Settings

    Note that if you make changes (In Visual Studio), build and overwrite the files, you still need to close revit and open it again for it to update. Which makes debugging a bit more tedious than a normal addin
    Last edited by josephpeel; August 10th, 2017 at 01:35 PM.

  5. #5
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    I have attached an image showing the files I have placed in the below directory. Is this correct?

    F:\Program Files (x86)\Autodesk Revit 2015\Revit MEP 2015\AddIns\MEPCalculation
    Attached Thumbnails Attached Thumbnails Flow Rate Calculation-add-files.png  

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