Comment Seems like a double edged sword (Score 1) 32
While not needing to compress and decompress gasses along with other inefficiencies of a standard data center sounds good. What are the long term issues?
How much energy was required to make, test, transport, assemble, and test was needed? Additionally, a hole in the side of a terrestrial data center can be patched easily. A hole that forms in this means a total loss. What about replacing outdated equipment? Even in nutrient poor water radiators and plumbing will need maintenance due to algae, bacteria, and critters growing on everything.
I've kept saltwater reef tanks. Keeping plumbing clean long term can be a challenge in a biologically closed system. In the open ocean who knows what kind of invasive critter could find all that warm plumbing an ideal new home. I suppose you could flush lines with toxic chemicals occasionally. But that's not really good for the environment.