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[EnergyPlus_Support] Re: Specify two hot water systems, use only one

Sankar,

Thanks for your reply. Your method is virtually identical to what I am doing now...its just a bit clunky and I was thinking it would be nice to "streamline" it. And yes, I am using GenOpt...it is a great optimization program.

Thanks,

Bob

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Sankar Padhmanabhan <sankar.padhmanabhan@...> wrote:
>
> Hi,
> Yes it is doable, though not without some external programming effort 
> from your part. For my MS thesis I had to do something similar to yours 
> with hybrid GSHP. I had to work with 6 different idf and select one of 
> them based on the optimization variable input. Are you using GenOpt? 
> Here is what I did:
> 
> I wrote an external program which does following things:
>    - Read the variables that optimization program wrote fro next run
>    - Depending on the variables determine which file to run?
>    - Once the file is determined run a batch file which renames the 
> selected file to in.idf, chane the weather file also if required and 
> runs the E+ exe.
>    - After E+ finishes run, post process the eso.
> 
> The optimization program must use this external program for function 
> evaluation purposes and not E+.
> 
> Hope I am clear. My MS thesis is available here:
> 
> http://www.hvac.okstate.edu/research/Documents/Sankar Thesis.pdf
> 
> Other students in our group have done similar work with other simulation 
> environments like HVACSim+. You can get their thesis also on our website 
> http://www.hvac.okstate.edu/theses.html
> 
> Thanks
> Sankar
> 
> On 3/1/2010 12:59 PM, roberturban4848 wrote:
> >
> > I am running an optimization problem in which I change a variety of 
> > building parameters. One of my variables is the type of hot water 
> > system. Unfortunately, a solar collector based system and a 
> > conventional system have vastly different IDF structures. Ideally, I 
> > would like to be able to physically have both in the IDF file, and 
> > "call" which one I want to use depending on what the optimization 
> > algorithm decides. That way I don't have to change the IDF file 
> > drastically when I go from one system to the other.
> >
> > Is that possible?
> >
> > 
> 
> -- 
> Sankar Padhmanabhan
> Graduate Research Assistant
> Ph.D Candidate
> Mechanical & Aerospace Engg
> Oklahoma State University,
> Stillwater, OK-74078
> Ph:405-744-2410 (O)
>




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