I am working in a project that had a previous consultant and we do not agree with the way the CHP shall be modeled. The building will be served by a natural gas power generator that will operate an indirect fired absorption chiller from 17:30 to 20:30. The Proposed Case has been previously modeled with a generator operating from 17:30 to 20:30 on weekdays, and Baseline Building has been modeled without it. I understand that energy modeling for LEED does not allow this procedure. According to the latest document on this issue, Treatment of District or Campus Thermal Energy in LEED V2 and LEED 2009 – Design & Construction, from 2010, a generator should have also been modeled for the Baseline case, from 17:30 to 20:30, but assuming separate production of electricity and thermal energy. Is there a more recent modeling protocol on CHP? Is it allowed to take credit of peak shaving without CHP?

Post a reply

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Wed, 03/04/2015 - 16:12

DESv2 only applies in the case where there is a larger plant serving multiple buildings. If your CHP is within the project then DESv2 does not apply. I am not aware of any circumstances where the CHP gets modeled in the baseline when using the DESv2 or not. There is additional guidance on CHP modeling within the Reference Guide. You can claim credit for peak shaving.

MARCIO OROFINO

ENE Consultores

ENE CONSULTORES

LEEDuser Basic Member

11 thumbs up

Thu, 04/16/2015 - 14:24

Hi, Marcus. Although it is not the case of a DES, the DESv2 is referenced as guidance. Refer to the Advanced Energy Modeling for LEED, Technical Manual v2.0, Sep 2011 Edition. Another document is referenced, this one for on-site CHP systems only, but I could not find it: "Methodology for Modeling Mombined Meat and Mower for EAp2/ EAc1 credit in LEED 2009" (July 18, 2011).

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Thu, 04/16/2015 - 15:24

If you Google the document title it comes up (this is often the best way to search USGBC's web site) - http://www.usgbc.org/sites/default/files/Methodology%20for%20Modeling%20Combined%20Heat%20&%20Power%20for%20EAp2c1%20in%20LEED%202009.pdf As far as I know this document is not longer used as guidance. The CHP guidance in the DES and in the Reference Guide is what you should be using.

MARCIO OROFINO

ENE Consultores

ENE CONSULTORES

LEEDuser Basic Member

11 thumbs up

Mon, 05/18/2015 - 17:57

We have submitted a CIR for the project and according to the ruling USGBC gives credit to projects that use fossil fuel for peak shaving of purchased electric demand...

Add new comment

To post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.

You are currently logged in under an enterprise account

FAQs about EAp2 :

Modeling of CHP

You rely on LEEDuser. Can we rely on you?

Add new comment