Computer room Power Factor
Computer room Power Factor
(OP)
I'm trying to track down some 'historical' figures on what the normal rnage of power factors could have been expected in large computer/data centres, approximately 10 to 15 years ago.
It's one of those things that I used to have a heap of reports on, but that was two or three employers ago, and I no longer have the information to hand.
I'm currently writing a report and want to show the trends of the power factor in these rooms over the last 15 years, and the effect this has had on UPS sizing etc.
Any links or other data would be appreciated.
It's one of those things that I used to have a heap of reports on, but that was two or three employers ago, and I no longer have the information to hand.
I'm currently writing a report and want to show the trends of the power factor in these rooms over the last 15 years, and the effect this has had on UPS sizing etc.
Any links or other data would be appreciated.






RE: Computer room Power Factor
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Computer room Power Factor
There are the following lines:
For a Relay or Control Cabinet normal losses per sqr.m of enclosure front surface are 323 w/sqr.m[an average value].
For a Distribution Panel 3000 w/cub.m [per total volume].
Relay Room- the lighting losses per room floor surface sqr.m are 20 w/sqr.m.
Control Room- the lighting losses per room floor surface sqr.m are 30 w/sqr.m
Relay Room total specific losses =Max. 530 w/sqr.m Min. 150 w/sqr.m
Control Room total specific losses =Max. 600 w/sqr.m Min. 200 w/sqr.m
Since the equipment mounted in a Relay Room and Control Room was very sensible to room temperature the Air Conditioning was the main consumer of a UPS.
RE: Computer room Power Factor
RE: Computer room Power Factor
I'm trying to show the trend in the PF of computer power supplies in large data rooms, so the output load on the UPS.
Basically I want to show some form of trend line showing how the loads on UPS systems have gone from approxiamtely 0.8 lagging to nowdays, with PF corrected supplies, the PF on the output of a UPS is now close to unity, or in many cases has actually switched to being a Leading PF.
RE: Computer room Power Factor
You could also try 80plus.org
http://80plus.org/