[TRNSYS-users] Minimization.

[David Bradley]

Didier,
I assume that you are working from the example of using GenOpt and 
TRNSYS with Type56 
(http://sel.me.wisc.edu/trnsys/demos/genopt-type56.pdf). If not, that 
will give you some good direction.

If I understand correctly what you are trying to do, you need to 
identify the material properties of your outside wall with variable 
names that will be replaced by GenOpt in the *.bui file at each 
simulation run. It might look something like:

*--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
* L a y e r s
*--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
LAYER GYPSUM
CONDUCTIVITY= 2.62 : CAPACITY= 0.75 : DENSITY= 1601
LAYER INSULATION
CONDUCTIVITY= %kInsul% : CAPACITY= %capInsul% : DENSITY= %rhoInsul%
LAYER STUCCO
CONDUCTIVITY= 2.49 : CAPACITY= 0.75 : DENSITY= 1858

You also need to define something to minimize and that will probably not 
change from the example. The example uses the integrated whole-building 
annual energy use as its minimization variable. You can follow section 
5.2.4 in the *.pdf.
Best,
david







On 6/18/2010 09:42, gossard at cict.fr wrote:
> Hi all,
>
> I want to minimize the total energy-consuming of a building by varying
> the thermal characteristics of the outside wall (density, thermal
> conductivity and specific heat). I use GenOpt and TRNSYS for that but
> I encounter some difficulties. I refered to the given example and I
> started with the same building modelisation for my problem.I do not
> know how integrate variables for density, thermal conductivity and
> specific heat in .bui template file.
>
> Could someone help me please ?
>
> Best regards,
>
> Didier Gossard from France.
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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