Re: [TRNSYS-users] Active Layers: Screed underfloor heating

[David Bradley <bradley@tess-inc.com>]

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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