[Bldg-sim] irs 179d guidelines

[Jeremiah Crossett]

Patrick,
For your fan power calc you may be able to use
http://energy-models.com/tools/leed-fan-calculator
Also the LEED tutorial provides good insight as to ASHRAE interpretation.

On Fri, Dec 16, 2011 at 2:55 PM, Patrick J. O'Leary, Jr. <
poleary1969 at gmail.com> wrote:

> i'm currently looking at the requirements for modeling a building to
> demonstrate energy savings per the epact 2005/irs 179d requirements & am
> trying to determine the proper method for calculating baseline fan power.
>  has anyone else done this yet?
>
> per the NREL manual, Appendix G Section, Wording Changes and Corresponding
> Sections in Standard 90.1-2001:
>
> "G3.1.2.9 Supply Fan Power:  The Reference Building model fan power shall
> be determined based on § 6.3.3.1 in Standard 90.1-2001"
>
> in 90.1-2001 section 6.6.3.1 is the section with the table that lists how
> to calculate the allowable system fan power.
>
> my question is, "for epact 2005/irs 179d energy modeling is the correct
> supply fan power to use in the baseline building the same as the allowable
> fan system power?"  this seems odd when comparing it to 90.1-2004 and
> having to calculate a baseline fan power (table g3.1.2.9) in lieu of using
> the fan power limitation (6.5.3.1) and plugging that number into the
> equation Pfan listed in section g.3.1.29.  it sort of just seems too easy.
>
> regards,
> patrick
>
>
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-- 
Jeremiah D. Crossett
Setanta Energy & Water
Phone: 503-688-8951
Email: jeremiah at setnrgh2o.com
http://www.setnrgh2o.com/
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