Wattage per square foot calculations for data centers

[mtfallsmikey]

One of the two buildings I run is up for lease, prospective tenant wants to know what the wattage per sq.ft. is for the 2 data centers ( power wise, not lighting). These were built by the previous tenants, and I have no clue what that number is. Is this a relatively easy calculation to make, or should I call in a pro?

 

[kingpb]

Your message is to vague; not sure what your asking for.

 

[Smart $]

One of the two buildings I run is up for lease, prospective tenant wants to know what the wattage per sq.ft. is for the 2 data centers ( power wise, not lighting). These were built by the previous tenants, and I have no clue what that number is. Is this a relatively easy calculation to make, or should I call in a pro?

Agree with kingpb, pretty vague...

Are data centers equipped in the lease? If not, there is no way to know unless they furnish power consumption info on the equipment they will be running. Even if equipment is known, unless it is/was metered separately, there is no way to know, as power consumption varies over time with usage.

Perhaps they simply want to know the power capable of being delivered without overloading the electrical system. Got the latest load calculations?

 

[Julius Right]

It is was a very interesting field, mtfallsmikey, indeed. What a pity I didn?t keep the research material-and it was 15 years ago.:weeping:
I try to attach-for information-an excel file of mine. However, from the Internet I picked up some titles:
Heat Loss from Electrical and Control Equipment in Industrial Plants:
http://www.mne.ksu.edu/people/personal/white/pdf-files/heat2.pdf
Calculating Total Cooling Requirements for Data Centers
http://apcmedia.com/salestools/nran-5te6he/nran-5te6he_r3_en.pdf?sdirect=true
Heat gain from switchgear, transformers, motors ..
http://www.engineeringtoolbox.com/heat-gain-equipment-d_1668.html

 

[Julius Right]

Sorry,no Excel file can be attached.So I'll try a jpeg one.

 

[mtfallsmikey]

Very good Julius, thanks!
I discussed this with the IT guru in my other building, said that was a very primitive method of figuring total load, shows that they do not know what they want to do with the data centers. When they leased the other building, they never used a WSF calc., just looked at what was a ailable. They have never been sub metered, so we don't know what the previous tenants actually used. Have a pair of 450 KVa UPS feeding both.

 

[mtfallsmikey]

P.S.
Data centers not equipped, prev. tenant removed everything, switchboards/CRAC units/wiring left behind, no load calcs available.

 

[kingpb]

P.S.
Data centers not equipped, prev. tenant removed everything, switchboards/CRAC units/wiring left behind, no load calcs available.

Going out on a limb, but sounds like the prospective tenant wants to know what he put in that won't require a building electrical system upgrade.

Assume Tier 1 (99.671% Availability) which includes single path of power and cooling, no redundancy.

Pie in the sky, for talking purposes the system can probably handle at least 30 Watts/sqft buildout.

 

[mtfallsmikey]

Going out on a limb, but sounds like the prospective tenant wants to know what he put in that won't require a building electrical system upgrade.

Assume Tier 1 (99.671% Availability) which includes single path of power and cooling, no redundancy.

Pie in the sky, for talking purposes the system can probably handle at least 30 Watts/sqft buildout.

Funny... My Asst. Chief came up with 28 WSF, never had done a calc like that before... Thanks!