[TRNSYS-users] active layer

[David Bradley]

Rahma,
  The TRNSYS result (*.lst and *.log) files should show you more 
information on the cause of the error. However, if I had to guess about 
it, I would first check and make sure that the mass flow rate that goes 
to your active layer (as an input to Type56) is always either 0 or about 
10% above the 750 kg/h that TRNBuild calculates as the required minimum 
value. The additional 10% is a bit of a mystery to me. I have run across 
it quite a few times and I think it might have something to do with 
issues of the density of the active layer liquid changing with 
temperature. If keeping the flow rate higher does not work then in your 
active layer specification, try setting the "minimum desired inlet mass 
flow rate" to 10 (the default) instead of 5 and again make sure that 
whenever there is flow going to though the floor, it is above 1500 kg/h.
Kind regards,
 David

Rahma GUECHCHATI wrote:
>
> Hello;
>
>  
>
> I want simulate a building (type 56)  heated by a  direct solar floor 
> used active layer defined in TRNBuild.
>
> I created a wall with an active layer After finishing the wall 
> definition, the wall is marked with an "A" in the overview box of walls.
>
> then I click on Active Layer Specification Bar, i defined all the 
> parameters "inlet temperature=1*tfluid, number of fluid loops=50, 
> inlet mass flow rate=1*flow rate,gain=0" then i pushing the DO-Button 
> but the wall window shows the active layer wall i defined does not 
> indicated by AS. it is always defined by A and when I run my project I 
> get error. I want to know where is the problem.
>  
> Best  regard
>  
>
> rahma
>
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>
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Thermal Energy System Specialists (TESS), LLC 
David BRADLEY                      2916 Marketplace Drive - Suite 104 
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