Dear fellow modeler,
If you have 115 branches and are using several splitters, you
might consider whether you really need so many branches. For
most energy models, accuracy will not be compromised significantly or at all by
combining similar zones.
As an exaggerated example, imagine that you have a 200M (long!) South
zone
·
It is only offices (similar function, lighting and windows)
·
on two separate floors (both are intermediate floors with no
ground contact or roof, e.g., Floors 2 & 3 of a 4 story building)
·
It is served by a single air system.
·
Because it is so big, the designer has assigned 40 separate
zones with 40 individual temperature controls.
Within a modeling program such as E+, these 40 zones can be
combined as a SINGLE zone with exactly the same results and a lot less effort
and computational time.
There is some “art” to understanding when it is
appropriate to combine zones, but it is mostly driven by a good understanding
of whether the heat transfer is similar or identical between different areas.
The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of kulandhaivel
muthusamy
Sent: Friday, March 26, 2010 8:02 AM
To: energy plus
Subject: [EnergyPlus_Support] problem with e+ from designbuilder
|
Hi All
i have a problem in opening the IDF file. I modeled the
building in Design builder and opened the file in energy plus but i am not
able to open it.i think it is because it has around 115 splitters since we
can create only 50 splitters in one object.so i deleted some
splitters in text editor and simulated again.now i can open the file.but the
problem is i don't know how to include all the splitters and mixers in idf. 1.
Do any one know what is mean by extensible object.i mean how to add more
lines in same object. 2.
another question is do the default value have any effect in the output
result. If yes, how to rectify it? 3.
How to separate the conditioned and unconditioned zones in the
model in design builder. |
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