Re: [EnergyPlus_Support] Internal mass

[Rahul Chillar <chillarrahul@xxxxxxxxx>]

Hello
 
As you put it, its lot dependent of building physics.Mainly because the partitions are not exposed to outside enviornment and its temperature fluctuates with the zones temperatures and the temperature lag depends on its thermal mass. 
 
Also generally the zones being seperated by Internal partitions have same temperatures on both the sides of the partitions too.
 
Hence the effect of partition is negligible on the loads, mainly the partition is preventing the convective transfer between the zones which would have take place had they not been present. 
 
 
Thanks
Rahul Chillar 
 
 

alexandrevarela2000 <amv@xxxxxxxxxxxxxxxxxxxxx> wrote:
Dear all,

I´ve simulated a building's internal mass like this:

1)Internal partitions as InternalMass (construction type Plywood)
2)Internal partitions as InternalMass (construction type brick wall)
3)Internal partitions modeled as walls (actual surfaces and not 
internal mass) and using solar distribution FullExterior 
(construction type brick wall)
3)Internal partitions modeled as walls (actual surfaces and not 
internal mass) and using solar distribution FullInteriorAndExterior 
(construction type brick wall)

The results regarding these situations didn´t change that much, which 
doesn´t seem right. On the other hand changing mass properties for 
external walls, roofs or floors does have a large impact on results 
(specially floor mass).

Could this be E+ software related, or is this relating only to the 
building's physics?

If you think it helps I will upload the base model.

Thank you very much,
Alexandre



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Thanks 
Rahul Chillar 
Grad Student 
Building Systems lab
Univ Of Illinois Urbana Champaign

		
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