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[EnergyPlus_Support] Re: Using and/or post processing the output variables from EnergyPlus
Hi Sankar,
Sorry, probably I did not explain my quiries well. I know that I can
defined the variables by using the delimiter from the *.eso file.
But, I figured the following. For example if you define the hourly
report, then in the *.eso file, each hourly value of indoor
temperature (or heat rate, or PMV, etc...) will have the same
delimiter number for different hours. In the optimization, GenOpt
takes just the last written number (For example, if you have *.eso
file obtained from design day simulation for hourly report, the
GenOpt will take just the value of some parameters in 2400.) Sorry,
this sentence is very confused, but I do not know how to expain
better.
Yesterday, I has figured something and maybe I will find the answer
there. I see that I can define the schadule for the results and then
I can choose what results I want to see in the *.eso file depend on
the given problem.
I will still try to make some schedule in GenOpt and use that
schadule for the results.
Thank you because of your interest in my problem
Natasa M.Djuric
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Padhmanabhan, Sankar"
<sankar.padhmanabhan@o...> wrote:
> Hi Natasa,
> No. GenOpt is not limited to the last written variable in the eso
file. It can actually look at any variable which is identified
uniquely by a delimiter. EnergyPlus eso file has a delimiter for
each output variable, which is an integer number and the variable
which is reported by any number is given in header. For your
particular case (if I understand correctly), you are just looking at
the indoor temperature at a particular time. Now GenOpt cannot
handle this, since there are values with this delimiter for other
time too. The way to approach this problem is to write a driver of
your own which actually looks at the value you want and write it to
a file, which in tunr is looked by GenOpt. More information on how
to use GenOpt with externally written driver programs can be
obtained in the following two thesis:
>
> http://www.hvac.okstate.edu/pdfs/Haider_Khan_thesis.pdf
> http://www.hvac.okstate.edu/pdfs/Sankar%20Thesis.pdf
>
> Hope this helps.
>
> Thanks
> Sankar
>
> ________________________________
>
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx on behalf of natasamdj
> Sent: Mon 6/13/2005 6:46 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Using and/or post processing the
output variables from EnergyPlus
>
>
>
> Dear,
> I have used GenOpt for the optimization of EnergyPlus. I know that
> in GenOpt you can optimize just the last written variables in the
> *.eso file. This means that if I want to have regular results I
have
> to use the daily report in optimization.
>
> My problem is, for example, what if I want to deal with indoor
> temperature at 1200. Or if I want to use in the optimization the
> maximal/minimal values of some parameters. Is there any possibility
> to recalculate the output results and then to use in the
> optimization?
>
> I do not know if I explained this properly. I just want to use the
> particular values of some parameters in the optimization.
>
> Please, if you know how to deal with this and if the explanation is
> bigger send me that like some documentation file.
>
> Thank you in advance and regards
>
> Natasa M.Djuric
>
>
>
>
> The primary EnergyPlus web site is found at:
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>
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> [Non-text portions of this message have been removed]
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