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CS-2009 EAp2:Minimum Energy Performance

Receptacle equipment in a Core&shell office building

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Eleftherios Zacharakis
Environmental and Energy Consultant
WSP Environmental Sweden
LEEDuser Basic Member
6 thumbs up

When using Table G-C in User's Manual for ASHRAE Standard 90.1-2010 to define the receptacle equipment power density in an office building, shall I assume that even the Servers power density is included in this reference value of 8.1W/m2 (0.75W/ft2)? In that case there is no need to handle the server rooms with seperate HVAC systems than the one per level, as refered in G3.1.1 exemptions. Any thoughts?

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Wed, 12/11/2013 - 17:00

It may depend on how much server energy use is associated with that particular project. If it is expected to be relatively small then you could justify including it as part of these values. If there may be larger server room kinds of uses beyond the norm then it would not be appropriate. Using the values in G-C is appropriate if there is no way of knowing what will be installed. Ideally you should model the actual expected plug loads in the spaces as accurately as possible.
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Eleftherios Zacharakis
Environmental and Energy Consultant
WSP Environmental Sweden
LEEDuser Basic Member
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Wed, 12/11/2013 - 16:48

Hello Marcus and thanks for your reply. Is there any references for what type of servers are considered to be the norm? According to the mechanical engineer the server installed power is a typical one for office buildings in Sweden where the building is located, but that might differ from the norm in the US. Any suggestion for references to look up about this issue?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Wed, 12/11/2013 - 17:08

I would tend to use what is typical for your location before I would use the Table G-C values. If you can cite a source of information on what is typical in Sweden or typical of the type of tenants you tend to get, that would be better than using Table G-C which is supposed to represent the norm in the US. The whole idea is to model the project as accurately as you can within reason.

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