[TRNSYS-users] Simulating a large building of which we have the 2D Autocad2020 plans

[Lakjiri Souad]

Dear David
For this time, I have the model 3D (with sketchup 2018)of my building but
with the extension .Skp not .idf
The model 3D  I have was drawn considering just architectural data without
taking in account the thermal zoning! Is there a way to convert the file
.SKp to .idf for a simulation with trnsys18, giving that my building is
complex and large!?
Thank you in advance


On Fri, 20 Nov 2020 at 15:25 David BRADLEY <d.bradley at tess-inc.com> wrote:

> Souad,
>
>  I believe that there is a way of opening a 2d dwg as a background image
> in SketchUp so that you can then trace over it more quickly than if you
> were to start from nothing. Still, each time that I have encountered this
> issue I have found that it takes juat about the same amount of time if
> fight with and correct an automatic import or if you start from nothing.
>
>  Here are a few tips that might help.
>
> 1. use as few thermal zones as possible on each floor. Often you can group
> together rooms that face a certain direction (i.e. have a particular sun
> exposure) into a single thermal zone.
>
> 2. model the plenum between floors as its own zone; this makes it much
> easier to deal with the zone adjacencies from one floor to the next.
>
> 3. rely heavily on the line drawing tool. Draw the perimeter of each
> thermal zone's floor then draw vertical lines for the corners then connect
> their tops. I have run into a lot of frustrations with the extrude tool.
>
> 4. where possible avoid copying and pasting zones. It is nearly as fast to
> draw another floor perimeter and walls. When I try copying and pasting I
> sometimes have trouble with SketchUp selecting things that aren't part of
> the zone that I am trying to copy.
>
> 5. do all the walls floor by floor first and then add windows after you
> have all the walls completed.
>
> 6. import the *.idf into TRNBuild and check adjacencies early and often. I
> don't usually do more than 3 or 4 zones before I save the *.idf, import it
> into TRNBuild, check it and then increase the version number in the name of
> my *.idf file. When you run into import errors I find it is often easier
> just to start over and redraw a few zones than it is to figure out where
> the error is.
>
> 7. this one is rather specific but if you are drawing opaque doors (i.e.
> walls contained within another wall) make a vertical line between the
> middle of the door lintel and the ceiling. This will break the containing
> wall into two walls and while that adds another surface for Type56 to deal
> with I have found that it avoids a lot of wall area calculation issues and
> errors in the *.idf file.
>
> best,
>
>  David
>
>
>
>
> On 11/20/2020 06:50, Lakjiri Souad via TRNSYS-users wrote:
>
> Dear Trnsys users,
> I want to simulate a complex building by TRnsys 18.I have the plans of the
> building drawn in 2D by Autocad2020 .
> What are the possible and easy ways to generate and insert the 3 D
> building in TRnbuild18 using the 2 D autocad 2020 plans? knowing that The
> building is large and it would take a lot of time if we use the sketchup18
> to model it in 3D .
> --
> Souad Lakjiri
> Electrical Project Engineer
> Morocco's Ministry of Health
>
> _______________________________________________
> TRNSYS-users mailing listTRNSYS-users at lists.onebuilding.orghttp://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>
> --
> ***************************
> David BRADLEY
> Principal
> Thermal Energy Systems Specialists, LLC
> 3 North Pinckney Street - suite 202
> Madison, WI  53703 USA
>
> P:+1.608.274.2577
> F:+1.608.278.1475d.bradley at tess-inc.com
> http://www.tess-inc.comhttp://www.trnsys.com
>
> --
Souad Lakjiri
Electrical Project Engineer
Morocco's Ministry of Health
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