[esp-r] Re: zone control model

[Georgios Kokogiannakis]

Hi Ali,

A small correction from Dr. Paul Strachan with regards to the previous email: 
tdf can deal with sub-hour data but the user should make sure that the 
simulation timestep corresponds to the time interval in the tdf file.

Regards,
Georgios

On Tuesday 16 October 2007 13:55, Georgios Kokogiannakis wrote:
> Hi Ali,
>
> for your tdf data you will need: (start-up period) + (simulation timesteps)
> + (1*24 number of data in order to make it work. I see that you only have
> 24 data in your file. You probably get few warnings during your simulation
> runs with the file that you are using.
>
> For example, if you want to simulate 4 days and you have 2 start-up days,
> you need: 4*24+2*24+1*24=168 data in your file. The data you are using for
> the extra do not matter but they need to be there.
>
> Also, just keep in mind that tdf can only treat 1 timestep per hour at the
> moment but there is work in progress to improve this.
>
> Hope this helps.
>
> Georgios
>
> On Tuesday 16 October 2007 13:12, Ali fallahi wrote:
> > Hi,
> >
> > Regarding my question about zone control model in ESP-r, here are some
> > explanations about my model. Whatever I am trying to represent with
> > ESP-r is a comparison of modeling of ventilated facade with results of
> > measurement campaign. In my modeling, ventilated facade is composed of
> > one layer of non-ventilated double pane (next to ambient temperature),
> > then a layer of ventilated glazing with a venetian blind inside (
> > Fig.1 in attached file). Ventilated facade has been divided vertically
> > to 9 zones.  Since here my aim is to study the phenomena happening
> > inside ventilated facade the measured boundary conditions ( outdoor
> > and indoor) are given as input for modeling. You were right that 18
> > zones seem much larger than one would typically find in an empirical
> > test chamber.  However, in my modeling there is a vertical temperature
> > gradient produced by rising air inside the ventilated facade and I
> > divided the ventilated facade to small zones to get closer to 2D heat
> > transfer on glazing for higher accuracy. I have attached control and
> > temporal file of my model. The temporal file gives zero temperature
> > and control file is able to control maximum 12 zones (after
> > modification of MBCDP in building.h from 8 to 100) . Even if temporal
> > file is able just to control air point temperature, I should not get
> > zero temperature for the whole simulation period. I would be pleased
> > if you could let me know your advice on my case to control more than
> > 12 surface temperatures.
> >
> > Best Regards,
> > Ali Fallahi
>
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