[Bldg-sim] eQuest/DOE2 instantaneous loads

James Lo ljameslo at gmail.com
Fri Oct 2 12:36:46 PDT 2009


Thanks Dr. Haberl and Nikola for the info, and it's clear now what 
the DOE2 file definitions are

The big question remains tho:

1. LOADS loads are calculated based on components of the buildings 
(window, wall, roof, etc) and these are design loads
2. SYSTEM loads are summarized loads subjected to the HVAC system, so 
these are "operation" loads

SYSTEM loads are not separate back into components, only total loads 
are present.

So my questions is really whether there is a way for me to break the 
SYSTEM loads back into components?, ie, x% of SYSTEM cooling load for 
month z is from wall conduction, y% is from window radiation, etc.

Is this even doable? hopefully I am making sense to you guys...

thanks!

- James

At 01:42 PM 10/2/2009, Jeff Haberl wrote:
>"SYSTEMS" outputs will be labeled SV or SS.
>
>"LOADS" outputs will be labeled LV or LS, in the upper left corner 
>of the page.
>
>"PLANT" outputs will be labeled PV or PS.
>
>Jeff
>
>
>8=!  8=)  :=)  8=)  ;=)  8=)  8=(  8=)  8=()  8=)  8=|  8=)  :=')  8=)8=?
>
>Jeff S. Haberl, Ph.D.,P.E., FASHRAE..............jhaberl at tamu.edu
>
>Professor............................................................Office 
>Ph: 979-845-6507
>
>Department of Architecture.............................Lab Ph:979-845-6065
>
>Energy Systems Laboratory.............................FAX: 979-862-2457
>
>Texas A&M University.....................................77843-3581
>
>College Station, Texas, USA, 77843..................URL:www.esl.tamu.edu
>
>8=/  8=)  :=)  8=)  ;=)  8=)  8=()  8=)  :=)  8=)  8=!  8=)  8=? 8=)8=0
>________________________________________
>From: bldg-sim-bounces at lists.onebuilding.org 
>[bldg-sim-bounces at lists.onebuilding.org] On Behalf Of James Lo 
>[ljameslo at gmail.com]
>Sent: Friday, October 02, 2009 1:35 PM
>To: Joe Huang
>Cc: bldg-sim at lists.onebuilding.org
>Subject: Re: [Bldg-sim] eQuest/DOE2 instantaneous loads
>
>Joe,
>
>Since we are only novice users here and only using the eQuest as our
>interface, I am not familiar with the DOE2 output file well enough to
>isolate the SYSTEM loads. (any pointers on the file definition will be great).
>
>That said, from what we can tell, the system loads (making sure I am
>not misunderstand you here), such as total cooling coil output, does
>reflect the changes we make. That said, since I am trying to separate
>them out into gains from walls/window, etc, I was looking into the loads side.
>
>I assume there must be some outputs from DOE2 file which eQuest is
>reading from which describe what I am looking for.
>
>Any additional help will be awesome.
>
>thanks everyone
>
>- James
>
>At 12:40 PM 10/2/2009, Joe Huang wrote:
> >James,
> >
> >There are two sets of loads in DOE-2, in both the LOADS and SYSTEMS
> >routines. Make sure you're looking at the SYSTEMS loads, not the LOADS
> >loads.
> >
> >Joe Huang
> >White Box Technologies, Inc.
> >346 Rheem Blvd. Suite 108D
> >Moraga CA 94556
> >YJHuang at whiteboxtechnologies.com
>
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