This solution probably doesn’t need pumps. Pumping seawater is tricky, parts corrode, salt deposits build up, algae grows and clogs, regular maintenance is needed.

I’ll bet what they’re doing is a sealed system with large radiators, the seawater cools the radiators, the radiators cool the air in the internal closed-loop system which never actually touches seawater.

At least, if I were designing the system, that’s what I would try to do.