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I've tried to build the active layer of the wall in TRNLizard. But It doesn't work. The pipe diameter is very small. Is there a problem with my energy model?
Dear Tian,
the model for active layers that is integrated in Type56 has certain conditions that must be met when modelling different active systems. You can find a guideline for modelling capillary tube systems in the TRNSYS Multizone Building Documentation, which comes with every TRNSYS installation (c:\TRNSYS18\Documentation\05-MultizoneBuilding.pdf) Chapter 5.2.4.5. Advanced (Opaque) Construction Types > Capillary tube system (p5-58).
"1. For entering the layers of the floor heating system start with a thickness of the layer adjacent to the active layer with a thickness ≥ 0.3 * pipe spacing.
..."
These same restrictions also apply when modelling the system using TRNLizard.
A more detailed description of the underlying model for the active layers can also be found in chapter 5.4.4. Integrated Model for Thermo-Active Building Elements.
Best,
Christina
