Re: [TRNSYS-users] Optimization at each time-step

[Georgios Kyriakarakos <gk@aua.gr>]

Dear Sunliang,

In the past I came across the work of Brian Coffey. In his MSc thesis he prepared a platform where TRNSYS was run within TRNSYS in the same manner as I understand you want to do it. The first TRNSYS is used as the real-time optimization platform for a controller, and the second TRNSYS is used to simulate the building and the first runs inside the second.
Links for the MSc thesis, related publications and software can be found in the GENOPT site:

http://simulationresearch.lbl.gov/GO/download.html

Regards,

George
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Dr. George Kyriakarakos, Agricultural Engineer
MSc Energy Systems & Renewable Energy Sources, PhD.
Agricultural University of Athens,
Dept. of Natural Resources and Agricultural Engineering
Iera odos street, 75, Athens 11855, Greece
Tel. +30.210.5294046 (direct), Fax: +30.210.5294023
Mobile +30.6942.046895
e-mail: <gk@aua.gr>
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----- Original Message -----
Από: SUNLIANG CAO <caosunliang@msn.com>
Ημερομηνία: Thursday, August 21, 2014 4:34 pm
Θέμα: [TRNSYS-users] Optimization at each time-step
Προς: "trnsys-users@lists.onebuilding.org" <trnsys-users@lists.onebuilding.org>, "hotline@Transsolar.com" <hotline@transsolar.com>


> Dear all,
> 
>  
> 
> I have a question upon the optimization in
> TRNSYS at each time-step.
> 
>  
> 
> As we know, currently, most of the
> optimization softwares, such as GenOpt, make the optimization for 
> TRNSYS based
> on a series of “complete” TRNSYS simulation results. In other words, the
> optimization software calls TRNSYS, and TRNSYS will run the whole 
> simulation (such
> as 1-year’s simulation) and return back a result after the simulation 
> completes
> 
>  
> 
>  
> 
> However, in my case, I have to make the
> optimization for the control of an energy system in TRNSYS at each time-step.
> This means that, at the beginning of each time-step, I have to 
> “virtually” run
> TRNSYS for the coming one time-step in the computer for many times 
> (e.g. 100
> times), and get an optimized parameter for the control of the energy system.
> Thereafter, TRNSYS “in real” run the simulation with the optimized 
> control of
> the energy system for the coming one time-step. And this process will 
> be
> conducted at each time-step.
> 
>  
> 
>  
> 
> Another question relating to the above-mentioned
> question: how can I return to the beginning of one time-step in TRNSYS 
> after the
> one time-step’s simulation passes?  For
> example, in a one-year’s simulation, after running the simulation for 
> 2968
> hours, I would like to return to the beginning of the 2968th hour. How 
> could I manage
> that in TRNSYS? Is there any way to create a type to force TRNSYS to 
> return to
> the beginning of certain time-step?
> 
>  
> 
>  
> 
> Thank you very much.
> 
>  
> 
>  
> 
> Kind Regards,
> 
> Sunliang
> 
>                                                
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