[Equest-users] [EXTERNAL] LEED Baseline for onsite cogeneration (UNCLASSIFIED)

[Steve Jacobs]

Hi guys,
Thanks for the responses. I have reviewed the central plant guidelines that
the USGBC has written. My main issue was how applicable they would be to my
project, since we are just using a small onsite microturbine and not a large
district system. I think I might be able to come up with an approach based
on the CHP guidelines and see what the reviewer thinks.

Have a great weekend!

-----Original Message-----
From: Eurek, John S NWO [mailto:John.S.Eurek at usace.army.mil] 
Sent: Friday, March 25, 2016 9:17 AM
To: Steve Jacobs <sjacobseng at gmail.com>; equest-users at lists.onebuilding.org
Subject: RE: [EXTERNAL] [Equest-users] LEED Baseline for onsite cogeneration
(UNCLASSIFIED)

CLASSIFICATION: UNCLASSIFIED

I have, sort of.  The project has a plant making electricity, using the
exhaust to make hot water and an absorption chiller using some of the hot
water to make chilled water.  I ran in circles trying to figure out the
actual plant efficiencies then went crazy trying to gather proof for the
leed submittle.  It got rejected, twice.... I went mad, got mad, cussed a
little.

I ended up using the default efficiencies under 2.4.1.2.3 (see page 13).
It ended up changing the energy model by less than 1%. (If I remember
correctly)

http://www.usgbc.org/Docs/Archive/General/Docs7671.pdf

So you can spend days and days trying to calculate the actual efficiencies
and then another week trying to convince usgbs to accept it, of just use the
baseline values.

- Note: I realized that since the building was well insulated, low power
density, energy recovery, etc.  I realized that even if the default values
are less efficient than the actual efficiency, since the majority of the
design was focused on using less energy, having that energy created less
efficient didn't hurt the values too much.

Note sure if this directly answers your question, maybe the pdf link will be
of more help than my answer.

-----Original Message-----
From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On
Behalf Of Steve Jacobs
Sent: Thursday, March 24, 2016 11:50 AM
To: equest-users at lists.onebuilding.org
Subject: [EXTERNAL] [Equest-users] LEED Baseline for onsite cogeneration

Has anyone done a LEED project with an onsite microturbine used for
electricity generation and heat recovery for the hot water loop. 

 

Appendix G seems to state clearly that I can take credit for the waste heat
recovery. My question is if I need to have the microturbine in the baseline,
but not use the heat recovery feature. Or if the Baseline should just be
standard electrical use on the main meter. 

CLASSIFICATION: UNCLASSIFIED