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I am trying to model a framed wall. can anyone please explain how this type of wall is modeled in energyplus? please see attached pic for reference. This is a traditional wall found in the Himalayan region made of stone, rubble and wooden frames.

asked 2022-08-25 04:39:13 -0600

GARIMA.RKE's avatar

updated 2022-08-25 11:56:50 -0600

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answered 2022-08-26 15:55:09 -0600

updated 2022-08-26 15:57:54 -0600

A suggestion (not a definitive answer). I'd model the assembly as a 3x-layered construction:

  • layer1: matA (150mm?), ~20% wood + ~80% stone/rubble
  • layer2: matB (300mm?), ~100% stone/rubble
  • layer3: matA (150mm?)

Material properties (a first rough guess):

  • wood (sal? cedar?)... k: 0.1 W/(m.K), Cp: 1500 J/(kg.K), rho: 500 kg/m3
  • stone/rubble (?) ... k: 2.0 W/(m.K), Cp: 1000 J/(kg.K), rho: 2000 kg/m3

... matA ('exposed area'-weighted composite): k: 1.6 W/(m.K), Cp: 1100 J/(kg.K), rho: 1700 kg/m3

That's the easy part. Tougher questions include wind exposure, air tightness, etc.

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I would second the described approach, likely values for thermal conduction can be tweaked/adapted by using the "mixed layer approach" according to ISO 6946.

AGeissler's avatar AGeissler  ( 2022-08-30 02:06:14 -0600 )edit

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Asked: 2022-08-25 04:39:13 -0600

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Last updated: Aug 26 '22