[TRNSYS-users] Active Layers: Screed underfloor heating

[David Bradley]

Paul,
 You're on the correct track. Specify a massive layer for the half of 
the screed that is above the active layer. Next, define and add the 
active layer. As soon as you do, a massive layer equal in thickness to 
your first one will be created below the active layer. I wasn't aware of 
the need to subtract out the thickness of the pipes from the massive layer.
Best,
 David


PAUL COALES wrote:
> I am creating a new "Wall Type" for an underfloor heating system.  The 
> real system consists of 20mm pipes embedded in 75mm of sand/cement screed.
>
> How do I represent this as massive and active layers?  My 
> understanding from the Type56 documentation is that I start with a 
> massive layer for the screed.  This should have a depth of the real 
> screed (75mm) minus the radius of the radient pipes ( 20mm/2 = 10mm) 
> This would give me a 65mm screed layer.  I would then define the 
> active layer which defines the pipe work.  Is this correct?
>
> Thanks
> Paul
>
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