"High conductivity Material layers are not well supported by Conduction Finite Difference, material conductivity"

asked 2018-08-03 16:36:54 -0500

sajithwjay gravatar image

updated 2018-08-03 18:37:38 -0500

I am trying to convert a BEopt file created in BEopt 2.3.0.2 to BEopt 2.8. However. I receive the following error message.

I have noticed that this occurs when I add new (customized) PCMDrywall objects to the "thermal mass" options.

* InitialInitHeatBalFiniteDiff: Found Material that is too thin and/or too highly conductive, material name = UAROOFINS 8/3/2018 2:30 PM: 045.xml: Error: * ~~~ * High conductivity Material layers are not well supported by Conduction Finite Difference, material conductivity = 7.853 [W/m-K] 8/3/2018 2:30 PM: 045.xml: Error: * ~~~ * Material thermal diffusivity = 1.759E-004 [m2/s] 8/3/2018 2:30 PM: 045.xml: Error: * ~~~ * Material with this thermal diffusivity should have thickness > 0.30821 [m] 8/3/2018 2:30 PM: 045.xml: Error: * Fatal * Preceding conditions cause termination. 8/3/2018 2:30 PM: 046.xml: Error: * Severe ** InitialInitHeatBalFiniteDiff: Found Material that is too thin and/or too highly conductivity

I would be grateful for any pointers towards how to convert the file given the above error notification.

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