[Equest-users] Equipment Load

Thu Dec 20 09:25:07 PST 2018

Thank you Nick. Yes, after trying different ways, I realized that fill “
Input Power” is better than per area. I assumed 20% of the input power
would be converted to heat gain. And 80% for sensible, 20% for latent. In
that case, the fraction I filled in the eQuest was 0.16 for sensible HG and
0.04 for Latent HG. Does that make sense?

Jing

On Wed, Dec 19, 2018 at 10:09 PM Nicholas Caton <
Nicholas.Caton at schneider-electric.com> wrote:

> Great thread!
>
> @Jing:  You definitely have some options in terms of how you use the
> inputs to account for installed vs. "thermally incident on the space"
> energy.  I personally prefer to use the "Input Power" field to represent
> the maximum "installed" watts/gas input, then use the "fraction to space"
> to capture how much isn't carried away by the hood(s).  From there, the
> associated fractional schedule(s) will dictate both what is seen over time
> at the meter and in the space.
>
> @All:  The COMnet appendix C schedules don't appear at my first glance to
> expressly cover kitchen equipment profiles, but rather appear to "dodge"
> the issue with the statement for refrigeration/gas equip of "COMNET
> defaults are based on continuous operation."  Perhaps digging into those
> defaults might reveal some effective FLE hours of operation for a  given
> kitchen?  Another avenue may be to research whatever current operational
> schedule guidance might via Fisher-Nickel (Fishnick) for LEED prescriptive
> measures - resources I believe are linked from here:
> https://fishnick.com/design/resources/leed/
>
> ~Nick
>
> Nick Caton, P.E., BEMP
>   Senior Energy Engineer
>   Regional Energy Engineering Manager
>   Energy and Sustainability Services
>   Schneider Electric
> D  913.564.6361
> M  785.410.3317
> F  913.564.6380
> E  nicholas.caton at schneider-electric.com
> 15200 Santa Fe Trail Drive
> Suite 204
> Lenexa, KS 66219
> United States
>
>
>
> -----Original Message-----
> From: Equest-users <equest-users-bounces at lists.onebuilding.org> On Behalf
> Of Paul Diglio via Equest-users
> Sent: Tuesday, December 18, 2018 8:51 AM
> To: Paul Diglio <paul.diglio at sbcglobal.net>; Jing Hong <
> hongjing.shirley at gmail.com>
> Cc: equest-users at lists.onebuilding.org; equest-users at onebuilding.org
> Subject: Re: [Equest-users] Equipment Load
>
> [External email: Use caution with links and attachments]
>
> ________________________________
>
>
>
> Hi Jing:
>
> Yes, as long as you have documentation to back up your estimate, I would
> use 20% of the electrical and gas energy as being rejected in the space.
> The tables look good to me.  I don't know what your schedule looks like.
> Attached is the COMnet schedules that are usually accepted by the rating
> authorities.
>
> Paul Diglio
> 87 Fairmont Avenue
> New Haven, CT  06513
>
>
>
> --------------------------------------------
> On Tue, 12/18/18, Jing Hong <hongjing.shirley at gmail.com> wrote:
>
>  Subject: Re: [Equest-users] Equipment Load
>  To: "Paul Diglio" <paul.diglio at sbcglobal.net>
>  Cc: equest-users at lists.onebuilding.org, equest-users at onebuilding.org,
> equestuser00 at gmail.com
>  Date: Tuesday, December 18, 2018, 9:29 AM
>
>  Hi
>  Paul,
>  For our cases, we
>  estimated 80-ish% of the heat will go right up to the  exhaust hood. So
> should I fill the equipment and internal  energy energy sources with the
> number before the 80%  reduction or after? For example, I have 10 W/sqft
> electricity cookers and 100,000 Btu/hr gas cookers in the  kitchen, do I
> fill the tables below correctly?
>
>
>  On Tue, Dec
>  18, 2018 at 6:38 AM Paul Diglio <paul.diglio at sbcglobal.net>
>  wrote:
>  Jing:
>
>
>
>  Usually there is an exhaust hood with makeup air in the  kitchen.  If
> this is true, then you need to estimate how  much heat is actually
> transmitted to the space compared to  how much heat is expelled through the
> hood.  This should  lower your cooling load.
>
>
>
>  Paul Diglio
>
>  87 Fairmont Avenue
>
>  New Haven, CT  06513
>
>
>
>
>
>  --------------------------------------------
>
>  On Mon, 12/17/18, Jing Hong via Equest-users <
> equest-users at lists.onebuilding.org>
>  wrote:
>
>
>
>   Subject: [Equest-users] Equipment Load
>
>   To: equest-users at lists.onebuilding.org,
>  equest-users at onebuilding.org,
>  equestuser00 at gmail.com
>
>   Date: Monday, December 17, 2018, 7:37 PM
>
>
>
>   Dear
>
>   All,
>
>   I have a question regarding
>
>   the internal load.
>
>   Under the Equipment tab of
>
>   the internal load, there are two tables. One is  Equipment
>
>   and another is Internal Energy Sources. For my project  with
>
>   a kitchen serving 5 hours daily, how to input  the power?
>
>   For example, based on the specification sheets, we  have
>
>   26.5 W/sqft input power density for electricity, and
>
>   474,000 Btu/hr for gas equipment. However, it will make  the
>
>   cooling load so huge for cooling
>
>   systems. Does anyone know
>
>   how eQuest convert energy input to cooling load? Did I  fill
>
>   the tables right?
>
>
>
>
>
>
>
>   Thank
>  you!Jing_______________________________________________
>
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