[Equest-users] Roof Conduction - Where are you?

[John Aulbach]

Aren't they in the return air load? Or if ducted returned, simply translated over time into the space below?

--- On Thu, 8/27/09, Craig Simmons <craig at greenengineer.com> wrote:

From: Craig Simmons <craig at greenengineer.com>
Subject: Re: [Equest-users] Roof Conduction - Where are you?
To: equest-users at lists.onebuilding.org
Date: Thursday, August 27, 2009, 10:19 AM




 
 






I recently noticed this as well and decided to revive this
thread to see if anyone has insight. How do the roof conduction loads translate
to HVAC loads? 

   

Based on the models I’ve run it’s obvious that roof
conduction is being accounted for on the HVAC side and it appears to be about the
right magnitude. However, added roof conduction loads to the plenum do not
translate to any added space loads or  building loads in the LS-x reports.
Does anyone have insight on how eQuest is handling them and why they do not
show up in space or building loads reports? 

   

Thank you in advance. 

   

Craig Simmons, LEED AP 

The Green Engineer, LLP 

   

   





From: Eckwahl, Tom
[mailto:TEckwahl at karpinskieng.com] 

Sent: Thursday, July 23, 2009 9:29 AM

To: equest-users at lists.onebuilding.org

Subject: [Equest-users] Roof Conduction - Where are you? 





   

My
baseline building energy usage is much lower than expected and in trying to
track down the cause I’ve found that the “Building Peak Load
Components” lists no roof heat gain or heat loss.  I did find that
there is a gain/loss located in the upper floor plenum and it’s shown in
the “Space Peak Load Components”.   

   

Is
the plenum not considered part of the building?  I’m concerned that
the plenum walls and roof are not being included in the energy modeling run. 

Thomas
N. Eckwahl

Project Engineer, Mechanical 

karpinski

ENGINEERING 

   



 


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