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Unchanging surface temperatures despite change in Phase Change temperatures

asked 2016-12-29 12:15:53 -0500

huntan gravatar image

updated 2016-12-30 08:21:10 -0500

Basically I'm wondering why the values for indoor and outdoor surface temperature (on the csv) aren't changing for this idf file when they should change as accompanied by the change in the enthalpy-temperature curve as described in MaterialProperty:PhaseChange.

I've tested it on the 'CondFD1ZonePurchAirAutoSizeWithPCM.idf' example file and it seems that there weren't any problems with the example file. I'm sure I have the required classes when I compared it against the example file.

For example when I change PCtemp 2 from 20 to 30 and PCtemp3 from 20.1 to 30.1, all the values for the surface temperatures remain the same, they should change but I have no idea why they don't. The example file shows a big difference, this one doesn't and I have no idea why...

image description

image description!Td8AgLaZ!v426mSD_rF... [idf file]

Thank you in advance!

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answered 2016-12-29 14:11:55 -0500

Mike06 gravatar image

does e+ handle phasechange materials in all solution algorithms? perhaps you have to change the solution algorithm in the "simulation > advanced > heat transfer function .... "?

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Hi thanks for the reply.

I'm not sure what you mean by that but do you mean that I should change the Algorithm for HeatBalanceAlgorithm from ConductionFinite to ConductionTransfer? But isn't CondFD the default algorithm for PCMS? (

huntan gravatar image huntan  ( 2016-12-29 19:29:06 -0500 )edit

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Asked: 2016-12-29 12:15:53 -0500

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Last updated: Dec 30 '16