Somehow, "boil all the oceans" takes on renewed, if still speculative/imaginative, significance.
There is a tempering station that dissipates the heat from the water before it is released back into the sea.
Then what advantage is there to sea water over a loop?
The heated water is tempered with cold sea water so it's closer to the temperature of the gulf when returned. This prevents a hot water plume at the outlet, which can cause environmental problems.