A hydroelectric facility comprising:
- a first bidirectional rotary hydraulic motor/pump device comprising:
- a first rotary toroidal piston chamber having a rectangular space with a bottom, two sidewalls, and an open top;
- four first stationary pistons and two first retractable gates for each first stationary piston within said first toroidal chamber mounted on a first chamber wheel fixed to a first axle on which it rotates, wherein said first stationary pistons and said first retractable gates are evenly spaced around said first toroidal chamber separating said first toroidal chamber into four first partitions;
- a first piston support for each said first stationary piston configured to hold said first stationary piston stationary while said first toroidal piston chamber rotates;
- a first stationary cover that encircles and seals said open top of said first toroidal piston chamber wherein openings through said first stationary cover allow each of said first piston supports to pass through and be sealed;
- and
- a first input port opening and a first output port opening in said first stationary cover for each said first partition;
- wherein said first toroidal piston chamber is configured to rotate by reacting directly to continuous hydraulic force on said first stationary pistons;
- and
- a second bidirectional rotary hydraulic motor/pump device comprising:
- a second rotary toroidal piston chamber having a rectangular space with a bottom, two sidewalls, and an open top;
- two second stationary pistons and two second retractable gates for each second stationary piston within said second toroidal chamber mounted on a second chamber wheel fixed to a second axle on which it rotates, wherein said second stationary pistons and said second retractable gates are evenly spaced around said second toroidal chamber separating said second toroidal chamber into two partitions;
- a second piston support for each said second stationary piston configured to hold said second stationary piston stationary while said second toroidal piston chamber rotates;
- a second stationary cover that encircles and seals said open top of said second toroidal piston chamber wherein openings through said second stationary cover allow each of said second piston supports to pass through and be sealed;
- and
- a second input port opening and a second output port opening in said second stationary cover for each said second partition;
- wherein said second toroidal piston chamber is configured to rotate by reacting directly to continuous hydraulic force on said second stationary pistons;
- wherein said first and second bidirectional rotary hydraulic motor/pump devices are connected in series and operate as pressure multipliers, wherein said first bidirectional rotary hydraulic motor/pump device operates as a four piston hydraulic motor with its output drive shaft driving said second bidirectional rotary hydraulic motor/pump device operating as a pump.