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EnergyPlus Warning: reverse order construction

asked 2018-01-06 05:37:37 -0500

Jenny's avatar

updated 2018-05-28 13:59:29 -0500

A warning is displayed in my simulation in EnergyPlus :

"GetSurfaceData: Construction DIVIDER WALL of interzone surface SURFACE 3 does not have the same materials in the reverse order as the construction DIVIDER WALL of adjacent surface SURFACE 16 * ~~~ * ...but Nominal U values are similar, diff=[0.0000] ... simulation proceeds. * ~~~ * ...if the two zones are expected to have significantly different temperatures, the proper "reverse" construction should be created ".

What does it mean? How can I solve it?

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answered 2018-01-06 10:06:03 -0500

Avi's avatar

As it reads I am not sure you must change anything. Anyway if you would like to get reed of the warning you need to make a new construction , let's name it OPPOSITE DIVIDER WALL, and assign the same layers which form DIVIDER WALL just in opposite order. Now assign the the new construction to one of your surfaces 3 or 16 (but not both).

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Thank you, you answer has been very valuable.

Jenny's avatar Jenny  ( 2018-01-06 15:08:20 -0500 )edit

answered 2018-01-07 21:30:29 -0500

updated 2018-01-07 21:30:39 -0500

Alternatively, if you create an interior wall construction that is symmetrical (i.e. gypsum, insulation, gypsum), I don't believe you will get this error and you don't need to create the "reverse" construction.

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Thank you a lot for your answer! I solved the problem.

Jenny's avatar Jenny  ( 2018-01-20 04:02:21 -0500 )edit

By the way ..How did you solve this? can you please tell me?

Siva's avatar Siva  ( 2018-01-23 11:39:57 -0500 )edit

I did as it is written in the first answer.

Jenny's avatar Jenny  ( 2018-02-02 05:44:55 -0500 )edit

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Asked: 2018-01-06 05:37:37 -0500

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Last updated: Jan 07 '18