Back in 2011, Facebook already built datacentres with performance metric as below;
PUE (power usage effectiveness) of 1.07 at full load.
WUE (water use effectiveness) of 0.31 liters/kWH (see the Summary below).
CapEx lowered by 45%, and reduced OpEx.
Higher reliability due to its simpler construction.
… but why are we still struggling with PUE of 1.3 or more in Australia? Worst, there are many that has PUE of 2 or more!
What can you do to reduce your PUE? For a start, get rid of your chiller, get rid of your cooling towers, get rid of your pumps, get rid of your pipe works, get rid of your duct works!