[Bldg-sim] Mixed fuel baseline for LEED

[Duggin, Cory]

You may be right there.  I was trying to decide how that applied since only the OA is being treated by the other sources.

Cory Duggin, EI, LEED AP BD+C
Associate/Energy Engineer
TLC Engineering for Architecture
direct:

615-346-1939



From: Porter, Fred [mailto:fporter at noresco.com]
Sent: Thursday, December 11, 2014 12:52 PM
To: Duggin, Cory; kbk kbk; bldg-sim at lists.onebuilding.org
Subject: RE: [Bldg-sim] Mixed fuel baseline for LEED

Cory,
I'm not sure I agree. Assuming the campus loop HW is from fossil fuel boilers, this seems to be a "hybrid" heating source for the conditioned areas. I.e. heating they receive is provided by both electricity and fossil fuels. Thus the baseline systems are from the "fossil fuel/hybrid" column. "Predominant" refers to size of floor area served, not proportion of the heat to any given area. There is an ASHRAE 90.1 interpretation for hybrid definition posted for 2007 I believe, and a recent unofficial interpretation re-emphasized that even a small proportion of fossil fuel heat to a "system" makes it a hybrid.
Fred
Fred Porter, BEMP, LEED(c) AP
Principal Engineer
Sustainability Services
NORESCO
2540 Frontier Ave, Suite 100, Boulder, CO  80301
Phone 303.459.7425 |  Cell 303.748.4536  |  fporter at noresco.com<mailto:fporter at noresco.com>
www.noresco.com<http://www.noresco.com>


From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Duggin, Cory
Sent: Friday, December 05, 2014 12:21 PM
To: kbk kbk; bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>
Subject: [External] Re: [Bldg-sim] Mixed fuel baseline for LEED

It would be easiest if you used option 2 per the USGBC district energy modeling guidelines.  Then the baseline doesn't change.  I would then choose heating source based on the predominant system, which I would assume is the VRF.

Cory Duggin, EI, LEED AP BD+C
Associate/Energy Engineer
TLC Engineering for Architecture
direct:

615-346-1939



From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of kbk kbk
Sent: Friday, December 05, 2014 1:10 PM
To: bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>
Subject: [Bldg-sim] Mixed fuel baseline for LEED


We have a building that uses VRF systems for Space cooling/heating. However the Outdoor air is conditioned using Hot/Chilled water from the campus loop. This poses a challenge in selecting the baseline.

If anybody and experienced this situation could you please hint on your approach.
Thanks.
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