attached image from a British hyperdrive paper shows the basic principle.
Sea water already has electrolytes in it, But it's not necessary use it to
make electricity from the ZPE units, the submarine's
nuclear power plants
generate the power
for the ZPE ,process or you can use the use the new solid state high density
lithium ion batteries to provide required power
Basically it's moving the water through large ducts running the length of the vessel, or least that's how it's done
in the movies.......
