Offshore installation for producing electrical energy

An offshore installation for producing electrical energy from thermal energy of the oceans, comprising:

• a floating platform supporting a generator for producing electrical energy from a temperature difference of water at a surface and at a depth;
• a suction pipe structure for drawing up the water from the depth and associated with the floating platform, the suction pipe structure for drawing up water from the depth include three portions, including a first portion formed by a rigid pipe having a lower end and an upper end, the lower end being immersed at the depth and the upper end immersed midwater at a reduced depth less than the depth, a second portion formed with flexible pipes for connecting the upper end to a third portion of the suction pipe structure, the third portion formed with rigid pumping pipes;
• and
• rigid discharge pipes for discharging the water outlet by the generator,
• the rigid pumping pipes and the rigid discharge pipes defining a lattice attached under the platform, the rigid discharge pipes positioned at a periphery of the rigid pumping pipes in the lattice.