[TRNSYS-users] Setting "front / back" coupling for interzonal airchange in type 56 - TRNFLOW interaction?

[David BRADLEY]

Philip,
   When you define a coupling air flow rate through an ADJACENT wall, a 
quantity of air from the ADJACENT zone enters the active zone. In your 
first picture below, 90 kg/h of air would enter zone AT_109 from airnode 
R_107. If you click on the little green arrow button that allows you to 
set whether the flow is constant, scheduled, or an input, you will see a 
note explaining what the conditions of the air entering the zone will 
be. If you want air to flow the other direction as well (from AT_109 to 
R_107) you have to define that separately in zone R_107.

   The front/back switch has to do with the thermal model and which 
surface of the wall is in a given zone.
Kind regards,
  David



On 7/25/2014 08:05, Philip wrote:
> Dear All,
>
> I could not find an explanation on the coupling "front/back", see below.
>
> I want to model an inter-zonal airchange between 2 zones (AT_009 and 
> R_007- _green arrow in the screenshot_), so I have to define one zone 
> as "*front*" and one as "*back*" and define the same coupling rate in 
> both zones.
>
>   * But does it make any difference which is defined as front and
>     which as back?
>
> There is also a *TRNFLOW *Network that connects some other zones 
> (AT_009 and AT_109 etc. ..) in order to realize*night ventilation* 
> through an Atrium.
>
> The zone *R_007 is not connected to the TRNFLOW network*, but I guess 
> it would make sense to link it?
>
> Any help highly appreciated!!!
>
> Thanks, and have a nice weekend,
> Philip
>
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> TRNSYS-users at lists.onebuilding.org
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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

http://www.tess-inc.com
http://www.trnsys.com

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