[Bldg-sim] Baseline system type for fossil fuel/electric hybrid

[Karen Walkerman]

... Although LEED has decided that predominantly electric systems with a
fossil fuel backup should use the fossil fuel baseline.  An example of such
a system is a geothermal heat pump system with backup boilers.

--
Karen
On Jan 16, 2014 11:02 AM, "Duggin, Cory" <Cory.Duggin at tlc-eng.com> wrote:

> The predominant condition is the one that serves the largest conditioned
> area.  This note is referring back to G3.1.1 exception a which allows the
> use of additional baseline system type(s) for non-predominant conditions if
> they are greater than 20k ft2.
>
>
>
> *Cory Duggin, EI*
>
> *Energy Engineer I*
>
> direct: 615-346-1939
>
>
>
>
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Nicholas Blanton
> *Sent:* Thursday, January 16, 2014 9:55 AM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] Baseline system type for fossil fuel/electric hybrid
>
>
>
> Hello,
>
>
>
> A project I’m building the energy model for is considering switching to
> electric heat. I understand that generally you would use the predominant
> HVAC system, so if the “predominant” system is electric, you would use
> System 8. See highlighted excerpt below.
>
>
>
> My question to you is: what qualifies as “predominant”? Is there some
> percentage of energy consumption assigned to gas and electricity that
> signifies either as being dominant?
>
>
>
> Thank you for the clarification.
>
>
>
> [image: cid:image001.jpg at 01CF12A6.36BD23F0]
>
>
>
>
>
> *Nicholas E Blanton*
>
> Mechanical Engineer  |  Graduate
>
>
>
> *Arup*
>
> 1120 Connecticut Avenue NW  Suite 1110  Washington DC 20036  USA
>
> *t* +1 202 729 8220    *d* +1 202 729 8241
>
> *m *+1 505 228 4154
>
> www.arup.com
>
>
>
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