[TRNSYS-users] WG: 2nd error generating shading/insolation matrix -> too many shaders on projection plane

Thu Jun 9 00:15:34 PDT 2011

Dear Marion,

Again a problem :-)

Still the same project. Everything worked fine with the shading matrix.

But now I've juste changed the windows: instead of one big window it's divided into three smaller windows (see picture in attachment). All the rest is exactly the same as before.

But again an error when I want to generate the shading matrix, this time:

[cid:image003.jpg at 01CC2685.C9DC5DF0]

So it's another kind of error. Any idea of the cause?

Kind regards,

Joke De Beuckelaer

project engineer mep

VK     HEALTHCARE      |      BUILDINGS      |      INDUSTRY      |      INFRA

Value by design

VK ENGINEERING  Avenue Clemenceaulaan 87, 1070 Bruxelles Brussel, Belgium

t   +32 2 414 07 77   f  +32 2 414 04 98   m  +32 473 97 01 50   e   joke.d at vkgroup.be   w   www.vkgroup.be

-----Oorspronkelijk bericht-----
Van: trnsys-users-bounces at cae.wisc.edu [mailto:trnsys-users-bounces at cae.wisc.edu] Namens Marion Hiller
Verzonden: donderdag 19 mei 2011 10:34
Aan: TRNSYS-users
Onderwerp: [TRNSYS-users] WG: 2nd error generating shading/insolation matrix -> too many shaders on projection plane

Dear Joke,

the previous email was sent accidentally. I didn't finish typing the equation. Please delete the previous one.

I debugged your project and it turns out that there are too many shaders

projected on the plane window/wall plane for clipping.

The shading routine isn't designed to calculate each lamella of a louver

for each window of a building. In addition each of your lamellas consist

of 6 surfaces. This results in 3040 shading surfaces!!!!

The solution is simplification without a significant loss of accuracy

(see attached image):

- delete all shading louvers except one for each orientation

- replace the six surfaces of a lamella by one sloped surface (the

diagonal

  surface in the shading box).

For these windows a shading matrix is calculated und the shading is

calculated automatically.

For the other windows you set the external shading factor to an input.

You define Ntype 103 (IBSHAD) and Ntype 104 (IDSHAD) for the windows

with the shading matrix. For each orientations this input is calculated

by an equation in the TRNSYS Project file

SHAD_ x_y_z = 1 - (IBSHAD+IDSHAD)/Window_area /IT_x_y_z

  with

IT_x_y_z  ... total incident radiation on kJ/hr on orientation x_y_z

If you still have trouble, please send me your IDF file.

Kind regards,

Marion

Dipl.-Ing. Marion Hiller

TRANSSOLAR: KlimaEngineering - Technologien für energieeffizientes Bauen

und Nutzerkomfort in Gebäude

Munich - New York - Stuttgart + 49.711.67976.0

Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart

Amtsgericht Stuttgart - HRB 23347, Steuernummer 99073/00911, USt-IdNr.:

DE152272639

Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer,

Dipl.Phys. Stefan Holst, Prof. Dipl.-Ing. Bleicher

-----Ursprüngliche Nachricht-----

Von: Joke De Beuckelaer [mailto:joke.d at vkgroup.be]

Gesendet: Donnerstag, 19. Mai 2011 08:09

An: Marion Hiller

Cc: TRNSYS-users

Betreff: RE: Re: [TRNSYS-users] Error: generating shading/insolation

matrix

Dear Marion,

It's strange that the error occurs because the surface number>999. When

I deleted all the shading except 1 rectangle, the same error occurred.

Or is this number (999) with the surfaces of the model included?

In attachment you can find the original idf file. Normally I've send all

my files already, didn't you receive them?

I'm working with Trnsys version 17.00.0018.

Thanks a lot already for all your help and I hope you can find the

problem,

Kind regards,

Joke De Beuckelaer

project engineer mep

VK     HEALTHCARE      |      BUILDINGS      |      INDUSTRY      |

INFRA

Value by design

VK ENGINEERING  Avenue Clemenceaulaan 87, 1070 Bruxelles Brussel,

Belgium

t   +32 2 414 07 77   f  +32 2 414 04 98   m  +32 473 97 01 50   e

joke.d at vkgroup.be   w   www.vkgroup.be

-----Oorspronkelijk bericht-----

Van: Marion Hiller [mailto:hiller at transsolar.com]

Verzonden: dinsdag 17 mei 2011 13:27

Aan: Joke De Beuckelaer

CC: TRNSYS-users

Onderwerp: AW: Re: [TRNSYS-users] Error: generating shading/insolation

matrix

Joke,

the error message is due to too surface numbers > 999. The surface

number can't be written in the log file (artsmetiers7_shd.log) and ***

are written instead.

*** Notice at time        :         0.000000

 Orientation of wall   SURF=***: azimuth angle= 180.00°, slope=  90.00°

 Orientation of wall   SURF=***: azimuth angle=   0.00°, slope=   0.00°

In order to see why the surface numbers are so high (starting with

3993 instead of 1) I need to need the original *.idf and check the

import function.

With what version of TRNSYS17 are you working? I have in mind that we

fixed such a bug created by the import.

Kind regards,

Marion

-----Ursprüngliche Nachricht-----

Von: Joke De Beuckelaer [mailto:joke.d at vkgroup.be]

Gesendet: Donnerstag, 12. Mai 2011 08:58

An: duffy at tess-inc.com; trnsys-users at cae.wisc.edu

Betreff: Re: [TRNSYS-users] Error: generating shading/insolation matrix

_______________________________________________

TRNSYS-users mailing list

TRNSYS-users at cae.wisc.edu

https://mailman.cae.wisc.edu/listinfo/trnsys-users

 VISIT US AT REALTY   SUBSCRIBE FOR THE VK-COCKTAIL AT REALTY

<mailto:marketing at vkgroup.be?SUBJECT=vk-cocktail>

****DISCLAIMER****

This communication is confidential and for the sole useof the addressee.

If you are not the intended recipient,

please immediately notify the sender by e-mail at the address shown and

then delete it from your system

without copying, disclosing or forwarding its contents. Thank you.

 VISIT US AT REALTY   SUBSCRIBE FOR THE VK-COCKTAIL AT REALTY<mailto:marketing at vkgroup.be?SUBJECT=vk-cocktail>
****DISCLAIMER****
This communication is confidential and for the sole useof the addressee. If you are not the intended recipient,
please immediately notify the sender by e-mail at the address shown and then delete it from your system
without copying, disclosing or forwarding its contents. Thank you.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20110609/e9c0730b/attachment-0005.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.jpg
Type: image/jpeg
Size: 24788 bytes
Desc: image003.jpg
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20110609/e9c0730b/attachment-0005.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: project.docx
Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
Size: 144675 bytes
Desc: project.docx
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20110609/e9c0730b/attachment-0003.docx>