[TRNSYS-users] [TRNSYS_users] GenOpt for cost's optimization

[Amr Alaaeldin Elesawy]

Hi Elise,
I'm beginning to work with GenOpt as well, so I'm not sure if I will be
able to help but I'll try...

I believe in order to vary the window size, you should vary as well the
wall size that contains it...

*For example (Just to explain the concept):*
If you have a wall area of 10m^2 and you want to have a window that is 2m^2
and then 4m^2 and then 6m^2... In this case, the wall area should be 10-2 =
8m^2 and consequently 6m^2 and 4m^2, right?
So in this case, you need to define a function that relates both window and
wall area ratios... Let's call the wall variable %wall%.. In this case
would be:
 %wall% = 10 - %window%

*Below you can see the code I used:*

*In the .bui file:*

*--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
*  Z o n e  GF_01  /  A i r n o d e  GF_01
*--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ZONE GF_01
AIRNODE GF_01
WALL  =WE_M       : SURF=  1 : AREA=        12 : EXTERNAL : ORI=NORTH :
FSKY=0.5
WALL  =WE_M       : SURF=  3 : AREA=        24 : EXTERNAL : ORI=WEST :
FSKY=0.5
WALL  =WE_M       : SURF=  4 : AREA=       *%aWall%* : EXTERNAL : ORI=SOUTH
: FSKY=0.5
WINDOW=WIN        : SURF=  5 : AREA=      * %aWin%* : EXTERNAL : ORI=SOUTH
: FSKY=0.5 : ESHADE=INPUT 1*SHADE
WALL  =WI_L       : SURF=  6 : AREA=        24 : ADJACENT=GF_02 : FRONT
WALL  =SE_L       : SURF=  7 : AREA=        32 : BOUNDARY=INPUT
1*TEMP_GROUND
WALL  =SI_L       : SURF=145 : AREA=        32 : ADJACENT=1F_01 : FRONT
 REGIME
 GAIN        = PERS_ISO01 : SCALE= SCHEDULE 2*OCC_BEDR
 GAIN        = LIGHT01_01 : SCALE= 1
 VENTILATION = VENT0.5
 CAPACITANCE = 115.2   : VOLUME= 96      : TINITIAL= 20      : PHINITIAL=
50      : WCAPR= 1

*In the optimization commands .txt file I wrote*

Vary {
    Parameter {
        Name    = *aWin*;
        Ini     = 1;
        Values  = " 7.2, 5.4 , 3 ";
        Type    = SET;
    }

    Function {
        Name = *aWall*;
        Function = *"subtract( 12, %aWin% )*";
    }

}

I hope this helped... Let me know if it worked well for you!

All the best,
Amr Alaaeldin


On Fri, Aug 1, 2014 at 6:50 PM, Elise Bernard <e.bernard54 at gmail.com> wrote:

> Hi,
>
> I'm working on the cost's optimization of a building with one termical
> zone using GenOpt with Trnsys17. This cost's optimization has to take into
> account the energetic consumption of the building and the construction's
> cost. I would like to use a logical function (if condition) to define a
> cost in function of the choice of the window.
> I tried to define my function in the ObjectiveFunctionLocation using this
> java code
> Name1= Cost; Function1="if (%window% == 2006) {1 }else {2}";
> But it seems that it doesn't work this way. Could you explain me how to
> handle my problem ?
> Thank you
>
> Elise
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>
>


-- 
--
Amr Alaaeldin Elesawy

*PhD Student | Building Engineering*
*Department of Architecture, Built Environment and Construction Engineering
(A.B.C.)*
Politecnico di Milano, Italy
+39 327 056 0018
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