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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Equipment Capacities for only one building pursue LEED

Hi, I have a District energy system (chillers, boilers, cooling towers, pumps) serves 3 buildings but only 1 pursues LEED, so my project doesn't use total capacities of those equipments. My concern is for proposed case, do i have to calculate by hand the equipment capacities for my building based on equipment schedule. It could be tough and not precise to do. Or I let software autosize capacities for the proposed case and I used this as the input Many thanks to your advice

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Haojie Wang
Energy Modeler
KJWW Engineering
LEEDuser Basic Member
3 thumbs up

Fri, 04/24/2015 - 15:48

I also have a similar situation. But my question is should we treat this as district energy or should we only calculate a capacity for this building and treat like a regular system
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4452 thumbs up

Fri, 04/24/2015 - 17:12

Sounds like a district system to me. You have options use the DESv2 - http://www.usgbc.org/Docs/Archive/General/Docs7671.pdf - or apply ASHRAE 90.1-2007 Addendum ai.

Mon, 05/04/2015 - 04:50

Hi, thank you very much for your advice. I would like to ask if I submit energy model in design stage, and then get feedback from GBCI, can I rerun energy model and resubmit energy model in Construction stage rather in the second round of design stage?
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4452 thumbs up

Mon, 05/04/2015 - 13:21

Not sure why you would want to do so?
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Lawrence Lile
Chief Engineer
Lile Engineering, LLC
LEEDuser Basic Member
59 thumbs up

Thu, 05/07/2015 - 16:15

Hieu, I always recommend teams submit the energy model in design phase. Teams almost always get review comments which are then addressed. Once the review comments are satisfactorily addressed, and the credit is marked "anticipated", there is no need to re-submit it during the construction phase. Perhaps that answers your question?

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