Perhaps it would be better to engineer the hardware to run warm-hot. Having to chill the water down to outside ambient temp (no compressors needed) would save a lot of energy and cost.
YES! This is exactly the approach being used currently in the most efficient (short of insane, no-cooling in a tent one-offs) datacenters today. Design the system to provide adequate space control at the typical outside ambient. Direct water cooling isn't even required, it can be done with large coils and evaporation cooling towers to take advantage of the wetbulb depression. As for energy savings, well on a typical 15 MW datacenter you can save about 6 MW for 8000 hours a year... That adds up fast.
Personally, I find it prudent to not smoke, listen to my doctor, and not test the conclusion that licking a frozen flag pole is a bad idea. Accepting that any conclusion could be false - a fundamental aspect of the scientific method - is radically different than asserting that any that you don't like could be false and can therefore be ignored.
What? Every case of causation I've ever heard of also showed correlation. Correlation does not PROVE causation, but it is a big flashing sign with a buxom topless girl waving pom poms jumping around it pointing in the right direction.
Note that at this point, the link between smoking and lung cancer still doesn't have a definitively proven causation.
What I see is the scientific establishment diligently working to identify flaws in the existing theory of climate change and freely publishing any flaws found. The FACT is that the scientific community is vigorously collecting data to challenge and correct where necessary climate change theory, and has been for over two decades now. Note this is the same scientific community that has endorsed the current climate change theories and it's predictions - which include pretty fat error bars you know.
I understand that to be science and is why I respect the consensus of National Academies of Science (or equivalent bodies) across the first world in this matter (and not Mr Gore or Exxon or the headline of the week).
Mathematics is the only science where one never knows what one is talking about nor whether what is said is true. -- Russell