[TRNSYS-users] airchange between zones

[David BRADLEY]

Alex,

   When you define an ADJACENT wall (or floor/ceiling) between two zones 
you have the ability to define a coupling air flow rate from each to the 
other. You can set the flow rate as a constant, as a scheduled value, or 
as an input. Type56 leaves it to you to determine how much air flows 
back and forth between the zones.

   The most correct way of determining the quantity of airflow is to use 
an airflow modeling tool such as TRNFlow or Type97/CONTAM.

   It is hard to answer your second question. The answer depends on what 
metrics you are looking at. For instance, I would be surprised to see 
the loads of the building change by 10% based on 1 zone or 2. However, 
if you are looking at consumption of energy by an HVAC system then it is 
possible, especially if you are using a single thermostat to control the 
system.

kind regards,

  David



On 01/24/2018 08:22, Alex moreno via TRNSYS-users wrote:
> Hi
>
> I have a doubt when i modeling a single family building with two floors,
> how i can connect the airchange between of  two zones (first floor and
> second floor)
>
> another doubt is:
>
> Firstly i simulated the two floors us one zones, but now i simulate the
> buildign us two zones, the results of heating differ 2% respec of  one
> zone building and differ cooling 10%, it is normally?
>
> regards
>
>
> Alex
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

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