[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




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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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