3 ms·For cooling you can also use a heat exchanger and dump it into a river or an ocean or so.by yxhuvud 6mo agoFor cooling you can also use a heat exchanger and dump it into a river or an ocean or so.jeffbee 6mo agoClosed loop heat exchange costs more electricity. It's not a free lunch that data center designers are overlooking.yxhuvud 6mo agoThat is of course true, but it is at least not a totally unreasonable practice, unlike using fresh water straight off the grid as a cooling source.