On Saturday 09 February 2008 10:08, Philippe Landau wrote:
...
But many power supplies are only efficient when they don't operate close to full load.
This seemed counterintuitive to me, so I decided to do a little looking around. According to the graph on page 14 of "Power Supplies: A Hidden Opportunity for Energy Savings" http://standby.lbl.gov/CEC_Workshop/Docs/Ecos_FinalReport.pdf this is not the case. Switching power-supplies have an efficiency peak when producing about 50% of their maximum rated output. However the curve on the low side of the efficiency peak is much steeper than that on the high side. So my suspicion was mostly correct. A PSU that has more than twice the capacity that it will be called on to supply will waste significantly more power than one being used in the 50% to 100% range.
kind regards Philippe
Randall Schulz -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org