SUBMERSIBLE HYDRAULIC ASSEMBLY FEATURING EASY DEPLOYMENT, EASY MAINTENANCE AND IMPROVED TORSIONAL RIGIDITY

Abstract

The present invention relates to a submersible hydraulic assembly (6) for an energy storage system (1) comprising: • at least one hydraulic machine (12); • at least one first buoyancy chamber (46, 50, 63) filled with at least one first buoyancy element (47, 51, 64); the first buoyancy chamber(s) (46, 50, 63) being configured such that the hydraulic machine (12) is substantially neutrally buoyant when immersed in an environmental liquid. The invention further relates to an energy storage system (1), a method for performing maintenance operations on an energy storage system (1), and a method for assembling / disassembling an energy storage system (1).