I ran a quick trial on my model and stopped the HAMT error for
thin impermeable materials by making them thicker. I had a 0.0008 m metal
that was causing problems, but making it 0.024 m stopped the error.
Consequently there must be some minimum thickness for HAMT materials. The
solution may to make a thicker material, but assign material properties that
make the new thick material perform like the thinner size. We frequently do
the same when using thin materials in a WUFI analysis.
Ned
Lyon, P.E. (MA)
Staff Consultant
SIMPSON
GUMPERTZ & HEGER
781.907.9000 main
781.907.9350 direct
781.907.9009 fax
www.sgh.com
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of fransalinas2004
Sent: Wednesday, September 01, 2010 2:52 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: HAMT and thin layers
Thanks Ned,
We have a large batch of HAMT simulations coming up, an it is good to
know what to expect. Fingers crossed!
Fran
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx,
"Edward G. Lyon" <eglyon@...>
wrote:
>
> 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
> SIMPSON GUMPERTZ & HEGER
> 781.907.9000 main
> 781.907.9350 direct
> 781.907.9009 fax
> www.sgh.com
>
> 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?
>
> Thanks,
>
> Fran
>
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
__,_._,___