[esp-r] Re: timedependent behaviour of control loop

[Achim Geissler]

Aizaz,

that sounds interesting. How does one ensure that each consecutive week
starts out with the building in the state at the end of the week, i.e.
without "startup" each time which may or may not lead to the same results
(the link you gave did not work for me, sadly)?

Regards,
Achim


-----Original Message-----
From: esp-r-bounces at lists.strath.ac.uk
[mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Aizaz Samuel
Sent: Monday, November 10, 2008 11:41 AM
To: esp-r at lists.strath.ac.uk
Subject: [esp-r] Re: timedependent behaviour of control loop

Christian,

Once the new version is out you may impose seasonal control.
You will need to define the actual days of year to be different day types in

the context menu first (say summer week/sat/sunday and winter 
week/sat/sunday). You can then define different behaviour for different day 
types as usual in the controls.

In order to have 52 different loops for the one zone, one (quite powerful)
way 
is to define 52 cfg files and 52 associated control files (possibly using a 
text editor). Simulate each of these for one week of the year using a shell 
script. Run results analysis using a script as well and output useful
results 
to some format of relevance. One useful example is ADEPT2.0 at 
http://www.sesg.strath.ac.uk/downloads.html The scripts there run 125 models

for 8 days each and output results to csv files.

Regards,
Aizaz

On Monday 10 November 2008 09:44, Georgios Kokogiannakis wrote:
> Hi Christian,
>
> this is actually a very good question. I recently faced the same issue for
> one of the CEN validation tests that asks for time shifting between winter
> and summer for both heating and cooling calculations.
> The answer is: yes, it is possible. It really though depends what type of
> control you need to use. If you just want ideal controls you can use the
> "imposed measured data" option in the "model context" menu and you can
> define setpoints for every timestep of your simulation. This way you can,
> for example, account for the time shifting between winter and summer.
> However, only heating setpoint is allowed in the standard distribution of
> ESP-r. If you want to assign heating and cooling setpoint at the same time
> then you will need to checkout my branch with a subversion client (email
me
> if you need more details on this). I have used this control and it
improved
> significantly my results for the validation test.
> Aizaz Samuel recently improved the standard control loops to accept more
> day types (you will have to checkout his branch for this) but this will
> still not do what you want.
>
> Hope this helps,
> Georgios
>
> On Monday 10 November 2008 09:05, Christian Anker Hviid wrote:
> > Hello ESP-r users
> >
> > This may be a stupid question but I am wondering what happened to the
> > different day type index numbers? Index 1-3 still exists as weekdays and
> > sat and sun. But what happened to 4-7?
> >
> > This leads to my true question: is it possible to specify different
> > behaviour for summer and winter for a weekday/sat/sun control loop? In
> > some places 52 different loops - one for each week - are mentioned as an
> > option, but how would you do that in a smart way? In other simulation
> > programs you can specify a hierarchy of control loops, but this is not
> > possible in ESP-r.
> >
> > Best regards
> > Christian Hviid, DTU
> >
> > _______________________________________________
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> > esp-r at lists.strath.ac.uk
> > http://lists.strath.ac.uk/mailman/listinfo/esp-r
>
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