[Bldg-sim] Really need some deep DOE-2 theology on this one..

[Patrick J. O'Leary, Jr.]

this sounds like you have multiple shells in one model for this to 
occur?  i'm pretty sure equest views an exterior wall/roof as an 
exterior wall/roof even if it is bounded by an interior wall.  i had 
this problem come up on one of my own models where i ended up having a 
building wing meet the building trunk & as i had put them in as 2 
separate shells equest did not recognize the dividing wall where the 
wing met the trunk as being an interior wall & assigned it (via the 
wizard) an exterior wall definition.  i didn't catch this until 
reviewing the unmet load hour ss-r & s-va reports & couldn't figure out 
why the load was so high.  changed the definition of the wall to 
interior (with a door) in detailed mode and the unmet load hours went to 
zero and the load came down.

my understanding (in my case) is that if you create multiple shells and 
place them with a common wall that you want to be an interior the shell 
rotations need to be zero, even if you have the separation between the 
two shells occur at a 45 deg angle (then ask mr. architect about that one).

On 9/28/13 4:47 PM, John Aulbach wrote:
> Hi Gang:
> I need to elite for this one, and you know who you are..
> I am reviewing another party's eQuest model submitted for LEED. The 
> reviewer noted that the roof area far exceeded the actual building 
> footprint.
> Well, guess why? Somehow, the other party made several floors ROOFS 
> instead of ceilings. I might be able to simply turn the exterior 
> spaces into interior ceilings, but one roof (over an unheated 
> underground garage) is partially uder the building and partially 
> exposed to the "sidewalk/entrance" of the building.
> The BIG Kahuena is this..if a space is crammed next to an adjacent 
> space and one of the spaces claims an Exterioir surface between them, 
> does DOE-2 think that Exterior surface is seeing outdoor conditions? 
> Or does it ignore such a thin and merely considers the heat transfer 
> between the spaces (like the wall/roof is NOT exposed to the outdoors)?
> My approach is this (unless you disagree)..leave the Exterior 
> wall/roof along and explain that the model (now in Detailed Edit form) 
> would need major surgery to correct to show actual roof area. Having 
> the "roofs" there versus floors will not change the thermodynamics of 
> heat transfer.
> I yield to the floor.
> John Aulbach, PE
>

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