Re: [TRNSYS-users] Atrium simulation with multiple airnodes

[ewen raballand <ewen.raballand@gmail.com>]

Dear users,
I still have no idea how to simulate buoyancy airflow between the airnodes of the atrium. 
COMIS and CONTAM are based on orifice model to calculate airflow through windows or cracks but there is no orifice between each airnode of the atrium model, only virtual planes... 
Is it better to simulate the atrium as one zone with one airnode ? What is then the interest of multiple airnodes ?

Thanks,

Best regards
Ewen

2011/8/5 Martin Pichler <martin.pichler@tugraz.at>

Hello,

for the simulation of sensitive thermal coupling u either have to use the coupling between neigboring zones directly or u use Type 56 with TRNFLOW. The latter will be mor accurate but more demanding in terms of input parameters.
Maybe my colleague can tell u more about that.

Best rgards
Martin

On 05.08.2011 11:52, ewen raballand wrote:

Dear all,

I'm currently trying to simulate an atrium. I'm using trnsys3D and the atrium's zone is divided in 6 airnodes.
I use the detailed model for radiation and I expect to simulate the stratification of temperature.

The results I have are not completely satisfying.
Is there any convective exchange between each airnode of a same zone or are the convective zones closed for each airnode ?
Does anyone has an idea on how to simulate buoyancy air flow in the atrium ?

Another question is : is it possible to have a zone with multiple airnodes and to use a standard model for radiation calculation ? it is not so clear to me in the MultizoneBuilding manual.

Best regards,

Ewen Raballand

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