[TRNSYS-users] Simulating a large building of which we have the 2D Autocad2020 plans
David BRADLEY
d.bradley at tess-inc.com
Mon Jan 31 12:19:15 PST 2022
Souad,
The situation is basically the same; there is not a way to
automatically convert a *.skp file to an *.idf but you can use the tools
in Trnsys3d to create zones and then trace over the lines in the *.skp
file so as to associate them with the zones that you have created.
kind regards,
David
On 01/31/2022 12:03, Lakjiri Souad wrote:
> 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 list
>> TRNSYS-users at lists.onebuilding.org
>> http://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:+1.608.278.1475
> d.bradley at tess-inc.com
>
> http://www.tess-inc.com
> http://www.trnsys.com
>
> --
> Souad Lakjiri
> Electrical Project Engineer
> Morocco's Ministry of Health
--
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
d.bradley at tess-inc.com
http://www.tess-inc.com
http://www.trnsys.com
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