[TRNSYS-users] Creating active layer and center of mass

David BRADLEY d.bradley at tess-inc.com
Tue May 22 09:04:59 PDT 2018


Active layers must be defined within certain boundaries. For instance 
the pipe spacing allowed within the layer depends on the thickness of 
the two adjacent layers. Because of this, active layers cannot be 
defined in isolation but must be defined at the zone level. Find the 
wall (floor or ceiling) that you want to make into a radiant surface and 
select "new" from the construction-type drop down menu. Define the layer 
that is adjacent to the active layer. Next, define a new layer and 
you'll have the ability to specify that it is an active layer.

I am afraid that I do not know the answer to your question about center 
of mass.

kind regards,


On 05/22/2018 03:55, Łukasz Wątły via TRNSYS-users wrote:
> Dear All,
> I would be grateful if you could answer my two questions which appear 
> while creating a building model in TRNSYS 17.
> First of all, I am planning to model a radiant heating system and 
> according to the manual I should create a new active layer. 
> Unfortunately, while clicking on a '/New Layer Type/' I have only two 
> options to choose, either /'Massive Layer/' or '/Massless Layer/'. 
> What might be the reason that I do not have other two options available?
> The second question regards the center of mass. In order to make a 
> temperature stratification, I created two air nodes within one thermal 
> zone, where exactly is the center of mass of the nodes placed? Is it 
> always a geometrical center of mass?
> Thanks in advance for your help.
> Kind regards,
> Lukasz
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Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

d.bradley at tess-inc.com


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