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[BLDG-SIM] Multiple building shells and the impact on mech equipment



Scott, I believe John is right. eQUEST will model the spaces as each shell is defined (i.e. if you have an external wall defined colliding with a space, it will model as an external wall). One way I've successfully used the DD Wizard to define an adiabatic wall is to define a larger footprint and then define a zone that doesn't intersect with one of the outer walls. The walls are only created depending on the zone in relation to the footprint defined. Therefore if a zone wall is on the same plane as the footprint wall, you'll get an outer wall. When a zone wall is inside the footprint, you get an adiabatic, interior wall. This saves going into the detailed interface at this point.
 

Mark Nieman, PE, CEM
Sr. Energy Engineer
McKinstry Essention
Direct: (206) 832-8152
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"For The Life Of Your Building"

Date: Mon, 11 Sep 2006 07:41:24 -0700 (PDT)
From: John Aulbach <jra_sac@xxxxxxxxx>
Subject: [BLDG-SIM] Multiple building shells and the impact on mech equipment

Scott:

If I understand you correctly, you have some of your shells spatially overlapping one another. I believe your question is if somehow the two areas will mix load.

I believe the answer is no. I have mistakenly placed multiple shell virtually one on top of another (not knowing I had done it), and eQUEST performed the simulation with no errors, and as if I had these two shells independent (one was supposed to be a 1st floor and another a 2nd floor - I had forgotten to use the Z component to raise the 2nd floor up).

I hope this is the answer what you are asking.



From: BLDG-SIM@xxxxxxxx [mailto:BLDG-SIM@xxxxxxxx] On Behalf Of Scott Runyon
Sent: Monday, September 11, 2006 6:10 AM
To: BLDG-SIM@xxxxxxxx
Subject: [BLDG-SIM] Multiple building shells and the impact on mech equipment

I am modeling a building using multiple building shells to eliminate work in detailed interface mode. The shells are joined by an adiabatic wall.

 

In one case, due to my modeling technique, the real zone over laps from one shell to another. In equest, I have created separate zones for these spaces, However, I have assigned them to the same air handler vav system.

 

Will this work properly, and closely simulate the real situation?

 

Is there a better approach?

Thanks,

Scott Runyon 

 

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