[Bldg-sim] Leed eac1 Plug loads

Wahid Hamed wahid.hamed at gmail.com
Tue Feb 18 01:32:06 PST 2014


I would like to raise a question within the same thread context. I am using
eQuest and modeling the process energy for a 25-story hotel as 25% of
baseline energy cost as per LEED default. The process energy includes (All
plug loads/Receptacles, computers, kitchen equipment, laundry, data center,
elevators, etc). I assumed that 25% default value is less than the actual
process energy.

In order to include all above process energy heat dissipation within HVAC
systems simulation for both proposed and baseline models without let eQuest
account for direct energy consumption, I have modeled the heat dissipation
(assumed equal input power value) in eQuest at Space, Equipment Tab,
Internal Energy Sources field, instead of Equipment field.

Is my modeling process at this area correct? Any help, advice, correction
will be highly appreciated.

Regards,


Wahid H. Mohamed, BSc, LEED AP BD+C
Mechanical Project Engineer, Energy Modeler
Saudi Diyar Consultants
 (+966)-5467 622 67

www. <http://www.diyar.com/>
<http://www.diyar.com/>diyar.com<http://www.diyar.com/>





On Mon, Feb 17, 2014 at 9:02 PM, Hudon, Philippe <phudon at bpa.ca> wrote:

>  Karen,
>
>
>
> You have the schedule in this pdf file.
>
>
>
> Regards,
>
>
>
>
>
> [image: cid:image001.jpg at 01CEFA41.CCA337B0]
>
> *Philippe Hudon**_ing., M.Sc.A.*
>
> phudon at bpa.ca <smayer at bpa.ca>
>
>
>
>
>
> *De :* Karen Walkerman [mailto:kwalkerman at gmail.com]
> *Envoyé :* 17 février 2014 12:29
> *À :* Hudon, Philippe
> *Cc :* bldg-sim at lists.onebuilding.org
>
> *Objet :* Re: [Bldg-sim] Leed eac1 Plug loads
>
>
>
> Philippe,
>
> That is a useful document. Thanks! Do you know where I can find the
> schedules that are referenced in the table? (A, B, C, etc)
>
> Thanks again,
>
> Karen
>
> On Feb 14, 2014 4:37 PM, "Hudon, Philippe" <phudon at bpa.ca> wrote:
>
> Hi,
>
>
>
> In Canada's norms, there are this table as reference for the plug loads.
>
>
>
> Regards,
>
>
>
>
>
> [image: cid:image001.jpg at 01CEFA41.CCA337B0]
>
> *Philippe Hudon**_ing., M.Sc.A.*
>
> phudon at bpa.ca <smayer at bpa.ca>   |  www.bpa.ca  |  t: 5143833747x2805|  cell:
> 4187204339
> 381 rue Belvédère, Alma, Qc, G8B 5Y9
>
> Les informations contenues dans le courriel que vous venez de recevoir, y
> compris les pièces jointes, sont destinées à l'usage exclusif de la (ou
> des) personne(s) identifiée(s) comme destinataires et sont confidentielles.
> Si vous n'en êtes pas le destinataire, soyez avisé que tout usage en est
> interdit. Si vous avez reçu ce courriel par erreur, veuillez le retourner à
> l'expéditeur et le supprimer complètement de votre système informatique.
>
>
>
> *De :* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *De la part de* Nick Caton
> *Envoyé :* 13 février 2014 16:36
> *À :* Duggin, Cory; David Eldridge; bldg-sim at lists.onebuilding.org
> *Objet :* Re: [Bldg-sim] Leed eac1 Plug loads
>
>
>
> This matches my experience as well for plug loads.
>
>
>
> I would only plan to itemize plug loads for LEED documentation if
> attempting to document an energy saving measure above and beyond 90.1
> pertaining to receptacle loads (such as plug load circuit controls required
> by the upcoming title 24).
>
>
>
> ASHRAE recommends 0.75 W/ft2 for office building receptacle power density
> in the user's manual for 90.1-2007 (for when you don't have better data to
> found the inputs on).  10W/m2 is approximately 0.93W/ft2 (if my math is
> right), so that's certainly within a reasonable range of expectations.
>
>
>
> I do not anticipate you will have any issues.  I've regularly documented
> exactly the value per the user's manual citing that as the source in my
> documentation with no further comment.
>
>
>
> ~Nick
>
>
>
> [image: cid:489575314 at 22072009-0ABB]
>
>
>
> *NICK CATON, P.E.*
>
> SENIOR ENGINEER
>
>
>
> Smith & Boucher Engineers
>
> 25501 west valley parkway, suite 200
>
> olathe, ks 66061
>
> direct 913.344.0036
>
> fax 913.345.0617
>
> www.smithboucher.com
>
>
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [
> mailto:bldg-sim-bounces at lists.onebuilding.org<bldg-sim-bounces at lists.onebuilding.org>]
> *On Behalf Of *Duggin, Cory
> *Sent:* Thursday, February 13, 2014 3:26 PM
> *To:* David Eldridge; bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] Leed eac1 Plug loads
>
>
>
> I've never had to provide an itemized list for equipment loads after
> simply telling them the receptacle loads were modeled as designed per space
> type.
>
>
>
> *Cory Duggin, EI *
>
> *Energy Engineer I *
>
> *TLC Engineering for Architecture *
>
> direct:
>
> 615-346-1939
>
>
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [
> mailto:bldg-sim-bounces at lists.onebuilding.org<bldg-sim-bounces at lists.onebuilding.org>]
> *On Behalf Of *David Eldridge
> *Sent:* Thursday, February 13, 2014 3:24 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] Leed eac1 Plug loads
>
>
>
> At lower than 25% levels GBCI likely will ask for an itemized list to show
> that you've considered all of the potential contributors. In addition to
> Fred's list, add elevators if these aren't separately modeled. Water
> coolers. Anything that shows up with a connection in the electrical plans.
>
>
>
> David
>
>
>
>
>
>
>
>
> David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP
>
> *Grumman/Butkus Associates*
>
>
>
>
>
>
>
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [
> mailto:bldg-sim-bounces at lists.onebuilding.org<bldg-sim-bounces at lists.onebuilding.org>]
> *On Behalf Of *Fred Betz
> *Sent:* Thursday, February 13, 2014 3:17 PM
> *To:* Chris Yates; bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] Leed eac1 Plug loads
>
>
>
> Chris,
>
>
>
> The plug loads are the plug loads. The 25% is just a guidance value from
> USGBC/GBCI. I've been over and under this level numerous times without a
> problem.
>
>
>
> If you've used the load estimated by the mechanical and/or electrical
> engineers and apply an appropriate schedule then it should be good enough.
>
>
>
> When you're under the 25% threshold a text box will appear for you to
> explain why. Just state that you've modeled the plug loads as designed.
>
>
>
> 10 W/m2 sounds a little low for an office. If the owner has made a
> commitment to use Energy Star devices or laptops for everyone, then 10 W/m2
> is plausible. Don't forget to include other equipment like servers/IT
> equipment, copiers and kitchen equipment (microwave, coffee maker, etc.)
>
>
>
>
>
> Fred
>
>
>
>
>
> *Fred Betz*  PhD., LEED AP (R)BD&C
> Senior Sustainable
> Systems Analyst
>
>
>
> *AEI* | AFFILIATED ENGINEERS, INC.
> 5802 Research Park Blvd. | Madison, WI  53719
>
> P: 608.236.1175 | F: 608.238.2614
> fbetz at aeieng.com  |  *www.aeieng.com <http://www.aeieng.com/>*
>
>
>
>
>
> *From:* Chris Yates [mailto:chris.malcolm.yates at gmail.com<chris.malcolm.yates at gmail.com>]
>
> *Sent:* Thursday, February 13, 2014 2:28 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] Leed eac1 Plug loads
>
>
>
> Dear bldg sim'rs
>
> I'm a little concerned that the plug loads I've modelled in my offices are
> low and could leed to some unwanted usgbc comments.
>
> I'm meeting the 25% requirement but the peak load in the offices is
> 10w/m2. Whilst i dont think this is overly optimistic the reviewers may
> think otherwise. Has anybody had experience of plug loads being queried in
> detail?
>
> Many thanks
>
> Chris
>
> Sent from my Android device. Please excuse typos, etc.
>
>
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