[Bldg-sim] ASHRAE 62.1
RobertWichert
robert at wichert.org
Thu Apr 23 10:06:49 PDT 2009
Found it!
ASHRAE 62.1: 2007 Section 6.2.7 "Dynamic Reset" seems to indicate that
CO2 control is just fine. If anybody has any advice on that, I'd love
to hear it.
Cheers!
--
Robert P. Wichert, P.Eng.
+1 916 966 9060
FAX +1 916 966 9068
================================================
RobertWichert wrote:
> I have asked questions about ASHRAE 62.1 on this list before, and I
> got some good guidance. I am going to try again to see if anybody has
> any ideas about my current dilemma.
>
> I am analyzing a circa 1999 dual duct VAV building with ASHRAE 62.1:
> 2007. I realize that the building was not, and may not, meet ASHRAE
> 62.1:2007 requirements, but LEED Existing Buildings wants me to check.
>
> Doing the analysis using the 62.1 spreadsheet, I can get it to pass
> but only if I increase the minimum cooling airflow to some conference
> rooms to 100% of design. This basically makes the VAV system into a
> constant flow system in those rooms, and could over cool the
> conference rooms if they are unoccupied and the lights are off, but it
> could be OK if the rooms are full of people and in use.
> It occurs to me that a CO2 sensor (demand control ventilation) could
> be applied to such an instance, or possibly some sort of "occupancy
> control", but I cannot find any discussion of such controls in 62.1.
>
> Question: Has anyone had a similar problem getting an existing
> building to comply with ASHRAE 62.1? Does anybody have a suggested
> solution?
>
> NOTE: I am using 62.1: 2007 by my own choice. If this is a bad
> choice, and I should be using 62.1: 2004 instead, please let me know.
>
>
> Thanks in advance for any thoughts you might be able to offer.
>
>
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