As I understand it, the internal mass object does not see direct solar gain. I have also found that it is sensitive to area defined. That means you can’t
just make a random object with total mass you want to simulate. The mass object should have the surface area of what you are representing.
Ned Lyon, P.E. (MA, WV)
Staff Consultant
SIMPSON GUMPERTZ & HEGER
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From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
Sent: Friday, January 16, 2015 5:44 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx; EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Internal Mass with "FullInteriorAndExterior" Solar Distribution Model
Dear EnergyPlus_Support,
Please excuse the accidental cross-posting.
I am trying to understand how the internal thermal mass (aka "InternalMass") is being handled in my EnergyPlus
models. On page 222 of the EnergyPlus Input-Output Reference it states, "simplifying calculations using internal mass must be used with caution when the "FullInteriorAndExterior" Solar Distribution model is chosen.
Could anyone kindly help me understand what "use caution" means? Does that mean that my internal thermal
mass does not "see" the solar radiation potentially hitting it (which might realistically be the case for certain interior elements if they are always in shade)? However, would you assume that this internal mass is still exposed to the indoor air, and thus
could still be absorbing or emitting heat in that way?
Many thanks for any guidance.
Best,
Holly
Holly W. Samuelson, DDes, LEED, AIA
Assistant Professor Harvard Graduate School of Design
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Posted by: "Edward G. Lyon" <EGLyon@xxxxxxx>
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