[mcorrientes]

The video looks a little bit like the open compute project video from facebook .

Isn't pumping so much water through the pipes less efficient compared to facebooks method of cooling air down by spraying the water ?

See fb method at http://livestre.am/wBjp

[devicenull]

That only works if the air you are cooling down is very dry. It then adds a bunch of humidity to the air, so it couldn't really go back to the DC.