[Equest-users] equest and energy plus outputs

[John Aulbach]

I am sure EnergyPlus is a fine and well thought out program (consider the 
sources and fine people involved).  However, since I am in production mode (and 
don't have time to create a model in two different programs-who pays for THAT), 
I chose to migrate to eQuest after DOE-2.1 A, B, C, D, and E. There are plenty 
of resources to ask questions of, the program started out in Windows (didn't 
need "add ons"), and gives me a 3-D rendering on the building immediately.

I dealt with 20 years of "raw" DOE-2, where I didn't know what my building 
really looked like (until Joe Huang came along with BDL Draw..). So I would need 
at age (you guess..) to not relearn an entirely new program and stick with what 
I had learned over the past 25+ years.

John R. Aulbach, PE, CEM
Senior Energy Engineer

________________________________

PartnerEnergy
1990 E. Grand Avenue, El Segundo, CA 90245
W: 888-826-1216, X254| D: 310-765-7295 | F: 310-817-2745
www.ptrenergy.com| jaulbach at ptrenergy.com


 



________________________________
From: deepika khowal <deepika.khowal at gmail.com>
To: Paul Diglio <paul.diglio at sbcglobal.net>
Cc: equest-users at lists.onebuilding.org; energyplus_support 
<EnergyPlus_Support at yahoogroups.com>
Sent: Thu, April 28, 2011 8:56:34 AM
Subject: Re: [Equest-users] equest and energy plus outputs

As Joe and others mentioned, its really difficult to create all parameters same 
in both softwares. 

I am still working on it .
For ex, which system should I use in equest as equivalent to unitary system in 
E+?
I understand its difficult to match every input and hence, getting same results 
is very tricky.
Thanks all for their inputs


On Thu, Apr 28, 2011 at 4:54 AM, Paul Diglio <paul.diglio at sbcglobal.net> wrote:

I thought E+ is a free program?  I would be interested to hear from anyone who 
has used Google SketchUp and the Open Studio Plug-in to generate a 3D view in 
E+.
>
>I would like to hear more about the discrepancies between eQuest and E+ from 
>those who use both programs.
>
>Paul Diglio
>
>
>
>
>
>
________________________________
From: Pasha Korber-Gonzalez <pasha.pkconsulting at gmail.com>
>To: deepika khowal <deepika.khowal at gmail.com>
>Cc: energyplus_support <EnergyPlus_Support at yahoogroups.com>; 
>equest-users at lists.onebuilding.org
>Sent: Thu, April 28, 2011 1:27:44 AM
>Subject: Re: [Equest-users] equest and energy plus outputs
>
>
>
>Hmmm- an energy plus model showed 50% less energy use (EUI) than eQuest?   Did 
>you use the same weather files?  (i.e. convert the EPW you used in E+ to .bin 
>and use the same weather file in eQuest?)
>
>If this is truly the case, this is unsettling as a simulator.   Wouldn't it be 
>safer for our clients to error on the conservative side and give the eQuest 
>results instead of the E+ results?
>
>Also--if this is the case, then what is the market advantage to spending 
>thousands of dollars on E+ software rather than use the FREE-ware eQuest 
>program??
>
>I'd appreciate any commentary to help me "see the light" of this topic.  And if 
>Deepika is willing to share a visual of his energy results output, I'm super 
>curious to see what it is showing...
>
>Good question/good info...thanks,
>Pasha
>
>Korber Energy Consultants
>
>
> 
>On Wed, Apr 27, 2011 at 7:11 PM, deepika khowal <deepika.khowal at gmail.com> 
>wrote:
>
>Thanks Joe 
>>Even I realized the same thing. the total energy use in Energy plus was almost 
>>50% less than equest.
>>If this is the case, who would you know that you model is working fine? 
>>
>>
>>
>>On Wed, Apr 27, 2011 at 6:06 PM, Joe Huang <yjhuang at whiteboxtechnologies.com> 
>>wrote:
>>
>>I was involved in a two year project 2005-2007 to convert the Calif. Energy 
>>Commission's Title-24 certification suite of building tests from DOE-2.1E to 
>>EnergyPlus.  There are some areas where it's difficult to get comparable inputs 
>>due to differences or limitations in the models. The differences between the two 
>>programs varied a lot depending on the building, weather, and HVAC system. For 
>>the CEC certification suite of 160 runs, cooling results were more consistent, 
>>within 10% in most cases, with EnergyPlus almost always on the high side; for 
>>heating, the differences were much greater, sometimes with EnergyPlus being 
>>40-60% lower than DOE-2.1E.  I have a 120-page report on this comparison, but 
>>haven't bothered to put it on the Web.
>>>
>>>Joe
>>>
>>>Joe Huang
>>>White Box Technologies, Inc.
>>>346 Rheem Blvd., Suite 108D
>>>Moraga CA 94556
>>>yjhuang at whiteboxtechnologies.com
>>>www.whiteboxtechnologies.com
>>>(o) (925)388-0265
>>>(c) (510)928-2683
>>>"building energy simulations at your fingertips"
>>>
>>>
>>>
>>>deepika khowal wrote:
>>>
>>>HI All
>>>>I am trying to create same model in equest and energy plus to see whether i see 
>>>>same results and just to validate my simulation files.
>>>>has anyone done this before?
>>>>I would like to know what is the % difference in both software outputs?
>>>>Thanks
>>>>Deepika
>>>>------------------------------------------------------------------------ 
>>>>
>>>>
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>>>> 
>>>>
>>
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>>
>>
>
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