Abstract: An energy producing unit is provided for producing energy from an artificial fall of fluid. The energy producing unit includes a host structure immersed in a fluid and a moveable member disposed within the host structure. The moveable member is independently vertically movable relative to the host structure between a risen position and a lowered position and is buoyantly biased to the risen position. An expandable compartment is formed within the host structure between a horizontal wall and a second horizontal member of the moveable member disposed below the horizontal wall. The expandable compartment expands and retracts when the moveable member is vertically moved between the risen position and the lowered position. The energy producing unit includes a conduit in communication with the expandable compartment and an energy extraction disposed within the conduit. As fluid flows through the conduit into the expandable compartment, energy is extracted from the flowing fluid.

Abstract: An energy producing unit is provided for producing energy from an artificial fall of fluid. The energy producing unit includes a host structure immersed in a fluid and a moveable member disposed within the host structure. The moveable member is independently vertically movable relative to the host structure between a risen position and a lowered position and is buoyantly biased to the risen position. An expandable compartment is formed within the host structure between a horizontal wall and a second horizontal member of the moveable member disposed below the horizontal wall. The expandable compartment expands and retracts when the moveable member is vertically moved between the risen position and the lowered position. The energy producing unit includes a conduit in communication with the expandable compartment and an energy extraction disposed within the conduit. As fluid flows through the conduit into the expandable compartment, energy is extracted from the flowing fluid.

Abstract: An energy producing unit is provided for producing energy from an artificial fall of fluid. The energy producing unit includes a host structure immersed in a fluid and a chamber positioned relative to the host structure such that the bottom wall of the chamber is immersed in the fluid. The chamber is vertically movable between a risen position and a lowered position and is buoyantly biased to the risen position when empty. The chamber has a primary valve which divides the chamber into an upper and lower portion to control the flow of fluid between the portions. The energy producing unit includes a conduit in communication with the upper chamber portion and an energy extraction disposed within the conduit. As fluid flows through the conduit into the chamber, energy is extracted from the flowing fluid. The invention also includes a system of at least two energy producing units.