[Bldg-sim] How long it takes for energy modeling? HME

[Steve Mignogna]

Sherie-

I also agree with Chris.  In addition, in my experience I have never been
able to complete an energy model using eQuest and verify the results in one
day. I would be very skeptical to believe that, unless it was an extremely
simple and early stage model built completely in the wizard.

Regards,

-- 
Steve Mignogna
Atelier Ten


2009/4/2 Chris Yates <Chris at zed-uk.com>

>  Hi Sherie,
>
> My feeling is that there are too many variables here to provide a
> definitive answer to your question. However, these are great questions that
> commercial and technical managers need to ask at the outset of a commission
> that will lead to greater understanding of time constraint and cost on a
> project by project basis.
>
> Other questions:
> What kind of analysis? E.g. energy benchmarking, loads or proving natural
> ventilation. These all require differing details.
> Complexity? E.g. facades, atria, plant
>
> Chris
>
> Sherie E. Hensley wrote:
>
>  I have done several energy models over the last few years using Trane
> Trace.  I have heard others (typically from those who don't have experience
> with energy modeling) say "it only takes a day" to create an energy model
> and get results.
>
> I am trying to get a better understanding of how long it takes others to
> complete an energy model.  I realize there are many factors involved and
> length of time can vary drastically given the complexity of the project.
>
> For an xxx sq ft project with xxx systems:
>
> 1.  What phase are you starting the energy model - SD, DD, CD?
>
> 2.  What information are you starting with - load results from another
> program, rules of thumb for system sizing, etc?
>
> 3.  What program are you using?
>
> 4.  How long does it take to build the proposed model?
>
> 5.  How long does it take to build the baseline model (per ASHRAE
> 90.1-2004, Appendix G)?
>
> 6.  How long does it take to calculate the results from the energy
> simulation program?
>
> 7.  If you have started a projected in the SD phase, how detailed is the
> input information you use?  How do the results compare to the energy model
> developed in CD - within 10%?
>
> Any information you can provide would be helpful.
>
> Thanks,
>
> Sherie Hensley
>
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>
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