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RE: [EnergyPlus_Support] HAMT and thin layers

You can apparently use very thin layers, I have entered roof membrane thicknesses.  All materials get divided into 10 layers.  That said, there can be problems with thickness.  I had the same insulation material with several thicknesses for a model, but one of the thicknesses crashed the simulation.  I had to change the material properties and thickness to make things work.  There also seems to be some issue with thin, impermeable layers that I have not fully resolved in my models.  One gets a repetitive error about calculating humidity greater than 100% in these assemblies.


Ned Lyon, P.E. (MA)
Staff Consultant

781.907.9000 main
781.907.9350 direct 
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From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of fransalinas2004
Sent: Wednesday, September 01, 2010 7:07 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] HAMT and thin layers



Dear all,

Reading the documentation, it is not clear to me how the cells in HAMT simulation deal with very thin layers such as films or membranes. What is the thinnest material layer I can input safely in this kind of simulation?




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