[Equest-users] Accuracy of eQUEST

[jra_sac]

Good points, Fred. I still do not understand the fist of the question !@


Sent from my T-Mobile 4G LTE Device

-------- Original message --------From: Fred Betz <fbetz at aeieng.com> Date: 5/8/21  2:23 PM  (GMT-08:00) To: John Aulbach <jra_sac at yahoo.com>, equest-users at lists.onebuilding.org, Saroj Lamichhane <213saroj at gmail.com> Subject: RE: [Equest-users] Accuracy of eQUEST 


Garbage in, garbage out. 
 
If the model inputs accurately reflect what’s is really happening, then yes it’s fairly accurate. Which is true for a lot of modeling tools.

 
Things like weather, schedules (occupancy, lights, equipment, etc.) can frequently be very different than reality, which can lead to a pretty wide range of results.

 
If you only want to use default inputs and typical weather and compare that to a real building data, then be prepared to have a 50% difference or more from what’s measured.

 
Hope that helps. 
 
Fred
 
 





Fred Betz,
PhD, LEED® AP
BD+C
Building Performance

(D) 608-236-1175 | (M)
 608-444-4857 | (O)
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Affiliated Engineers, Inc.

5802 Research Park Boulevard
| Madison, WI 53719




 

 


From: John Aulbach <jra_sac at yahoo.com> 

Sent: Saturday, May 8, 2021 12:30 PM

To: equest-users at lists.onebuilding.org; Saroj Lamichhane <213saroj at gmail.com>

Subject: Re: [Equest-users] Accuracy of eQUEST


 


Hello:


 


Not sure about the question you are asking.


 


DOE-2 (the engine of eQuest) has been around since the late 1970s. I know the creators and researchers have done countless benchmarking simulations against existing buildings
 to make the program viable. I myself have done runs against buildings with sub metering and the tracking has always been excellent.


 


Also, when I have run EEMs against a Base model, and had those modifications M&V'd later, they always seem to match.


 


So I think there should not be a worry of the accuracy of eQuest/DOE-2.


 


John R. Aulbach, PE


 





On Friday, May 7, 2021, 07:58:33 PM PDT, Saroj Lamichhane via Equest-users <equest-users at lists.onebuilding.org>
 wrote: 


 


 




Hello everyone,

Does anybody have information about the effective modeling capability (Accuracy) of eQUEST with respect to the building parameters? Have a nice weekend!


Thank you!


Saroj Lamichhane


 

 




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