[Bldg-sim] High Process Loads for LEED

[Matutinovic, Luka]

Jason,

 

There is no way to exclude process energy from EAp2/EAc1 calculations
under LEED 2009.  The only way you can improve EAc1 performance is to
document process savings relative to some baseline.  I'm also eagerly
awaiting some assistance from the USGBC/CaGBC/ASHRAE on baselines, but
I'm not aware that anything's been published yet.   

 

In the case of data centre energy, I thought about using Energy Star
Portfolio Manager to determine a baseline by entering a portion of the
modelled building as a data centre (less than 10% of area), but I
suspect that Portfolio Manager, being a bit of a black box, won't spit
out a separate energy intensity for just the data centre space.   I
think other modelers speaking on this issue have mentioned being lucky
enough to have clients with large data sets of previous projects that
they used for benchmarking various process loads.

 

It may seem unfortunate that, for the moment, high-process energy
buildings have a difficult time getting higher energy savings compared
to their low-process load counterparts, but if the goal is to reduce
building-related GHGs (as it should be), then it's probably about time
all energy use in buildings gets addressed.  Not that good intentions
help modelers much for the time being without some baseline values we
can use.

 

Luka Matutinovic, B.A.Sc., LEED(r) AP
Halsall Associates Ltd.
Tel: 416.644.0649 * Toll Free: 1.888.425.7255  *  www.halsall.com
<http://www.halsall.com/> 
Vancouver * Calgary * Sudbury  * Burlington * Toronto * Ottawa * Dubai

Best Workplaces in Canada Globe & Mail 2010, 2009, 2008, 2007

P Please consider the environment before printing this e-mail

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Jason
Wendel
Sent: Wednesday, September 29, 2010 1:23 PM
To: 'bldg-sim at lists.onebuilding.org'
Subject: [Bldg-sim] High Process Loads for LEED

 

I realize this has already been hashed out, but in searching the forums
it sounded like they didn't get resolved so I am asking anyway:

 

The building we are designing has a very high process energy use (60%)
because of a large data center and the TV Studio equipment, lighting,
and broadcasting.  The process loads stay the same in the building for
the proposed and baseline case, so the difference in energy costs
between the two (as a percentage) is very low.  Whereas, if the data
center energy, broadcasting energy, studio lighting energy weren't
included in the costs for the energy usage in the building, the
difference would be greater, thus reporting just the difference in
energy usage for the mechanical system and building efficiencies.

Is there a way to not count the data center and broadcasting type
equipment electrical loads for EAp2?

Previous listings mentioned that in LEED 2009 they were working on
creating baselines of process loads for different types of buildings
that you could compare your process loads to.  Has that gone anywhere?  

FYI:  I am getting 3 points for EAc1 right now, but if I were able to
magically delete the extra process loads above the required 25% from
both the baseline and the proposed design, I would earn an additional 3
points.

Thanks,

-Jason

 

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