Re: [TRNSYS-users] :-(( Re: Shading masks

[David Bradley <bradley@tess-inc.com>]

Adrien,
 Check the order of your components. If Type56 
appears in the input file before the shading 
component then it gets called first and sometimes 
gets an incidence angle from the previous time 
step before it gets the revised incidence angle from the current time step.
Cheers,
 David


At 02:24 7/13/2007, Adrien JEZEQUEL wrote:
> Dear David,
>
> Thanks a lot for your answer and your 
> explanation which were really helpful to adapt the *.msk file.
>
> But I encounter another problem concerning beam 
> radiation on facing East : warning messages 
> appear and block the simulation running (when 
> the maximum number of warnings allowed exceeds 
> of course). I am not sure that increasing the 
> maximum of allowed warnings is the right way. So 
> I am searching some way to fix these warnings but without success.
>
> The warning message is written below. It 
> concerns beam radiation on East surface orientation with Type 56:
>    /"Beam radiation greater than 0 occured for 
> an incident angle of 100.48 greater then 90° 
> for orientation 11. Beam radiation has been set to 0."/
> This message appears for every surface which 
> have east orientation at different time step.
>
> If anyone have an idea concerning that problem, he's welcome.
>
> Thanks in advance for your answers.
>
> King regards, Adrien
>
> David Bradley a écrit :
> > Adrien,
> >   The first column in the *.msk file is the 
> > angle formed between the horizontal and an 
> > imaginary line drawn between the center point 
> > of the shaded surface and the top of the 
> > obstruction. If you enter an angle of 0° that 
> > means that the obstruction has a height of 0 
> > in that direction and that the surface would 
> > be unshaded from sunlight coming from that 
> > direction. If you enter a value of 90° that 
> > means that the obstruction has an infinite 
> > height in that direction and that the surface 
> > would always be shaded from sunlight coming 
> > from that direction. 0° = no shading, 90° = 
> > complete shading (for that surface angle direction)
> > Cheers,
> >  David
> >
> >
> > At 11:17 7/12/2007, Adrien JEZEQUEL wrote:
> > > Dear TRNSYS users,
> > >
> > > I'd like to model shading masks, caused by neighbour buildings. To do
> > > that, I am using Type 68 with "mask file". I understand how to use it
> > > and to connect it to others components. But I am not sure to really
> > > understand how the first column of the file is taken into account by
> > > TRNSYS.
> > >
> > > If I put an angle between 0 and 90 °, it means that there is a solar
> > > shading isn't it? But if I write 0 or 90°, what does it mean? How these
> > > values are interpreted by the component : Total shading? No Shading?
> > >
> > >
> > > Thanks in advance for your help.
> > >
> > > Best regards,
> > >
> > > Adrien
> > >
> > > --
> > >
> > > ***************************************************************
> > > Adrien JEZEQUEL
> > > Ingénieur en Simulations Dynamiques
> > > ITF (Ingénierie Tous Fluides)
> > > 87, route de Chambéry
> > > 73230 ST ALBAN EN LEYSSE
> > > FRANCE
> > > Tel: 04.79.75.00.29
> > > Website: www.itf.biz
> > > Mail : a.jezequel@itf.biz
> > >
> > >
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> >
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> >
> > Thermal Energy System Specialists (TESS), LLC
> > David BRADLEY                           2916 Marketplace Drive - Suite 104
> > Partner                                        Madison, WI 53719
> > Phone: (608) 274-2577 USA
> > Fax: (608) 278-1475
> > E-mail: bradley@tess-inc.com
> > Web Pages:  http://www.tess-inc.com     and      http://www.trnsys.com
> >
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> --
>
> ***************************************************************
> Adrien JEZEQUEL
> Ingénieur en Simulations Dynamiques
> ITF (Ingénierie Tous Fluides)
> 87, route de Chambéry
> 73230 ST ALBAN EN LEYSSE
> FRANCE
> Tel: 04.79.75.00.29
> Website: www.itf.biz
> Mail : a.jezequel@itf.biz

****************************************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY                           2916 Marketplace Drive - Suite 104
Partner                                        Madison, WI 53719
Phone: (608) 274-2577 USA
Fax: (608) 278-1475
E-mail: bradley@tess-inc.com
Web Pages:  http://www.tess-inc.com     and      http://www.trnsys.com

"Providing software solutions for today's energy engineering projects"
****************************************************************************************