floor and ceiling temperatures in type 160

[Adriana Angelotti <Adriana.Angelotti@xxxxxxxxx>]

Dear Torsten and everybody,

I'm simulating a radiant slab between two zones with type 160 and type 56 
but I get non physical results.

From the upper zone point of view the slab is a FLOOR with a BACKSIDE 
temperature given as a boundary by type 160 (OUTPUT 4).
The upper zone balance calculation in type 56 then gives the floor 
FRONTSIDE temperature, which is used by type 160
in next step (INPUT 7).

From the lower zone point of view the slab is a CEILING with a BACKSIDE 
temperature also given by type 160 (OUTPUT 5).
The lower zone balance calculation  then gives type 160 the ceiling 
FRONTSIDE temperature for next calculation (INPUT 8).

So every time step I have 4 surface temperatures for only 2 surfaces. I 
expect that only 2 of them are really different, but
that's not what I get. The same surface has a temperature as seen from the 
upper zone and another dramatically different
temperature as seen from the lower one.

Anybody has an idea of what is wrong in my simulation or in the linkings I 
made between type 56 and type 160?
Thank you very much in advance

Adriana

At 14.31 18/09/03 +0200, you wrote:

> Adriana,
> in the upper zone you have a floor with a boundary  Temperature linked to 
> TYPE 160 Output 4 (Tfloor)
> in the zone below you have a ceiling with a boundary Temperature linked to 
> TYPE 160 output 5 (Tceiling)
>
> So you have two zones and in-between them is TYPE160
>
> Torsten
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: Adriana Angelotti [mailto:Adriana.Angelotti@polimi.it]
> Gesendet: Mittwoch, 17. September 2003 15:23
> An: trnsys@relay.doit.wisc.edu
> Betreff: Re: AW: problems with type 160
>
> Dear Torsten,
>
> suppose I want to be in case 1.
> Then in zone 1 the slab should be defined as a boundary wall with 
> temperature and convection coefficient linked with type 160.
> But what should it be in zone 2?
> Another boundary wall linked with the same type 160?
> Or an adjacent wall with backside facing zone 1?
>
> Thanks again
>
> Adriana
>
>
>
>  as a At 14.08 16/09/03 +0200, you wrote:
>
> > Dear Adriana,
> > there are 2 posibilities
> > 1) you simulate the room on the other side of the slab cooling and link 
> > the backside temperature to the surface
> > temperature of the ceiling for that room.
> >
> > 2) if the conditions in the adjacend room are the same you can link it to 
> > the ceiling ofthe same room.
> >
> >
> > Torsten
> >
> > <mailto:Hotline@transsolar.com;>Mailto:Hotline@transsolar.com; 
> > http://www.transsolar.com
> >
> >
> > -----Ursprüngliche Nachricht-----
> > Von: Adriana Angelotti [mailto:Adriana.Angelotti@polimi.it]
> > Gesendet: Montag, 15. September 2003 18:58
> > An: trnsys@relay.doit.wisc.edu
> > Betreff: problems with type 160
> >
> > Dear trnsys users,
> >
> > is there anybody experienced with type 160 "Floor heating and Hypocaust"?
> >
> > I'm trying to use it with type 56 using trnsys 14.2 but I get strange 
> > results,
> > probably I don't link it the right way.
> >
> > I defined the radiant ceiling as a BOUNDARY wall with an internal 
> > temperature
> > and  a convective coefficient calculated by type 160.
> > But what about the back side temperature and convective coefficient?
> >
> > Thank you in advance for any help or example.
> >
> > Adriana Angelotti
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ----------
> > Adriana Angelotti
> > PhD student
> > eErg end-use Efficiency Research Group
> > Politecnico di Milano, Dipartimento di Energetica
> > Piazza Leonardo da Vinci 32
> > 20133 Milano
> > Italy
> > ph +39.02.2399.3859
> > fax +39.02.2399.3940