[Equest-users] equest and energy plus outputs

[deepika khowal]

So based on my analysis, there is a difference of about 10% in results of
equest and E+. I would believe that because there are certain parameters
which are very difficult to match.
this seems reasonable to me.

On Thu, Apr 28, 2011 at 9:09 AM, John Aulbach <jra_sac at yahoo.com> wrote:

> 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
>  ------------------------------
>
> *Partner** **Energy*
>
> 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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