[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [TRNSYS-users] TRNSYS 17-TRNBuild - multiple airnodes...
Hi,
1) please have a look to the Trnsys3d Tutorial at page
20. There is a picture at the bottom that shows in what case you'll use the
virtual surface. Normally this wall type is used if you want to simulate
stratification effects like in wintergardens,... By this you could for
example have a radiative zone (means all walls are in radiation exchange) with
several AIRNODES inside. The virtual surface is just a seperator of these
Airnodes that will be deleted after importing into
TRNBUILD.
2) If you use Trnsys3d you'll at first define all
walls in the 3D geometry. These definitions for walls and windows will remain in
TRNBUILD. If you have AIRNODES defined for a radiative zone then the REGIME
DATA is splitted up into two parts, the REGIME DATA for the
specifique AIRNODES (like heating, cooling,...) and the REGIME DATA for the
radiative zone (like GEOMETRY MODE,...).
3) Normally if you have two zones that are linked by an
ADJACENT WALL you can define a COUPLING in TRNBUILD if you select these walls
(like defining a GEOSURF or WALLGAIN). But you have to consider that couplings
can only be in a positive direction. This means that for example if you are in
the definition of zone A you can define a COUPLING from zone B with xxx kg/h air
flow. If you want an air flow the other way then you have to be in the
definition of zone B and to define a COUPLING from zone A... A special case is
if you have a virtual surface between AIRNODES because this will be thrown
out and so you have no wall to define a coupling. For this reason there is a new
button called COUPLING in the REGIME DATA of the AIRNODES. There you can make
the same definitions as for walls.
Regards
Christian
TRANSSOLAR Software Team
Transsolar KlimaEngineering - Technologien für
energieeffizientes Bauen und Nutzerkomfort in
Gebäuden
Transsolar Energietechnik GmbH, Curiestrasse 2,
70563 Stuttgart / Amtsgericht Stuttgart - HRB 23347 / USt-IdNr.:
99073/00911
Geschäftsführer: Dipl.Ing. Matthias Schuler,
Dipl.Ing. Thomas Auer, Dipl.Phys. Stefan Holst, Prof. Volkmar
Bleicher
Hello,
I recently started
to explore TRNSYSv17 and I got a few unanswered questions about TRNBuild.
Hopefully, someone of you will be able to help me on this.
I'm using TRNSYS3D
plug-in for Google SketchUp to create 3D Multizone buildings and I import them
in TRNBuild to add the regime data, equipments...I also worked a bit with the
Multizone Building tutorial example called 'Restaurant'.
1- In a practical sense, what means 'Virtual Surface'? What are the properties of
this type of wall? What are the cases in which it is
used?
2- If we create a new airnode in a
zone, do we have to redefine all the building surfaces or they are
assigned by default? Same thing but with the regime data, is it assigned to
all the new airnodes in a zone or just to one by
default?
3- In the restaurant example that I
tried to recreate, there is a convective coupling between airnodes in two
differents zones. How is it possible to do
that?
Thanks in advance for any help you
can provide!
Sumaila
Laboratoire des technologies de l'énergie
(LTE)
600, avenue de la Montagne
Shawinigan, QC, G9N 7N5
Tel: 819-539-1400 poste 1340