[Equest-users] process load categorization in outputs

[Ramana Koti]

Lyle and Bruce, thank you, that is helpful.

Ramana.


On Fri, Sep 27, 2013 at 12:14 AM, Bruce Easterbrook <bruce5 at bellnet.ca>wrote:

>  When I do kitchens I set them up as separate HVAC zones.  The
> refrigeration side is not that critical.  The cooler will be a fairly
> consistent load 24 hours a day with the main variable being the
> efficiency of the heat rejection equipment and the outside temperature
> variation.  The freezer will/should be well insulated and won't have much
> impact on adjacent spaces.  The cooking area is a totally different
> mater.  You will require exhaust as per NFPA rules and makeup air to
> match.  The cooking units will be fairly consistent during the time they
> are on as far as the heat the emitted into the space and can be modelled
> as process equipment with an appropriate schedule.  The required MUA will
> have large variations throughout the year and should be modelled as it's
> own zone.  This unit and it's performance will dominate the energy
> consumption of the kitchen and eating area.  To not set this area up to
> make it available to analyze it's energy efficiency and impact is a
> disservice to your client.  Doing this also will take into account the
> impact on adjacent zones.  Equest will only allow one HVAC unit per
> zone.  Because the kitchen area is so intense you really have to set it up
> as a separate zone with a separate unit.  Once you have done that then you
> have all the tools to track temperature, humidity, performance etc.
> Bruce Easterbrook P.Eng.
> Abode Engineering
>  On 26/09/2013 4:39 PM, Lyle Keck wrote:
>
>  Hi Ramana, ****
>
> ** **
>
> One option would be to create separate meters and input the process
> equipment as direct loads (electric or gas consumption) as you have
> described.  You could then go to the individual space(s) and under the
> ‘equipment’ tab define an internal energy source with the source type set
> to ‘process’ (internal energy sources deemed process will not contribute to
> a utility load).  This will effectively create a heat gain (or loss) within
> the room and you can assign the appropriate fraction of sensible/latent
> gain.  This should allow you to define the input power as direct loads on
> meters, and subsequent internal gains in specific spaces.****
>
> ** **
>
> ** **
>
> *LYLE KECK**  *LEED AP BD+C, EIT
> SUSTAINABLE SYSTEMS ANALYST****
>
>  ****
>
> *AEI* | AFFILIATED ENGINEERS, INC.
> 1601 Fifth Avenue, Suite 1400 | Seattle, WA 98101
>
> P: 206.829.7307 | F: 206.256.0423
> lkeck at aeieng.com  <lkeck at aeieng.com> |  *www.aeieng.com*  ****
>
> ** **
>
> ** **
>
> ** **
>
> ** **
>
> *From:* Ramana Koti [mailto:ramana.koti at gmail.com <ramana.koti at gmail.com>]
>
> *Sent:* Thursday, September 26, 2013 7:22 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] process load categorization in outputs****
>
> ** **
>
> Dear all,****
>
> ** **
>
> I'm modeling a commercial kitchen under the LEED for Retail rating system.
> ****
>
> ** **
>
> Per the end use classifications in the LEED template Section 1.6 Table
> EAp2-4, its seems advisable to have process loads output from eQUEST
> separately along the lines of Refrigeration, Cooking, commercial kitchen
> equipment.****
>
> ** **
>
> I currently have all of them lumped under equipment loads in two different
> HVAC zones which makes the program output all the consumption under one
> heading 'miscellaneous equipment'.  This captures the equipment's latent
> and sensible contribution to heating and cooling loads. (Accurate but no
> breakdown)****
>
> ** **
>
> If I created separate meters and input the process equipment as direct
> loads, I'm unable to assign the heat they emit to any particular HVAC zone
> which is unacceptable considering their contribution to the heating and
> cooling loads. Kind of a catch-22. This method also does not allow
> differentiation between sensible and latent contributions. (Broken down but
> not accurate)****
>
> ** **
>
> Is there a workaround?****
>
> ** **
>
> Thank you,****
>
> Ramana.****
>
>
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