Hi, I am trying to document the efficiency for comms room AC units and a data centre down flow AC units. As we are in Europe the efficiency is quoted by manufacturers in EER. ASHRAE 90.1 2007 Table 6.8.1D refers to COP. Does anyone have an accepted conversion. e.g an EER will have a COP of ???
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
January 7, 2016 - 9:32 am
COP = (EER)/3.413
Ciaran McCabe
DirectorPassive Dynamics Sustainability Consultants
12 thumbs up
January 7, 2016 - 9:45 am
Thanks. Is there any exemptions for smaller AC units. I have some AC units that have an EER of 3.57 and this would equate to a COP of 1.046 which is less than the minimum performance for LEED (2.49). I can't get units with a COP of 2.49 as this would mean an EER of 8.5 which is not available in the marketplace ? Is my interpretation wrong ?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
January 8, 2016 - 3:32 pm
I am not aware of any exceptions for small air conditioners. The EER of the units you mention is well below what is legal in the US. These minimum efficiencies are mandatory for LEED projects.