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 of said four first stationary pistons within said first rotary toroidal piston chamber mounted on a first chamber wheel fixed to a first axle on which it rotates, wherein said four first stationary pistons and said two first retractable gates are evenly spaced around said first rotary toroidal piston chamber separating said first rotary toroidal piston chamber into four first partitions;
- a first piston support for each of said four first stationary pistons configured to hold said first stationary piston support stationary while said first rotary toroidal piston chamber rotates;
- a first stationary cover that encircles and seals said open top of said first rotary 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 of said four first partitions;
- wherein said first rotary toroidal piston chamber is configured to rotate by reacting directly to continuous hydraulic force on said four first stationary pistons;
- and
- a second bidirectional rotary hydraulic motor/pump device, smaller than said first 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 rotary toroidal piston chamber mounted on a second chamber wheel fixed to a second axle on which it rotates, wherein said two second stationary pistons and said two second retractable gates are evenly spaced around said second rotary toroidal chamber separating said second rotary toroidal chamber into two second partitions;
- a second piston support for each of said two second stationary pistons configured to hold each of said two second stationary pistons stationary while said second rotary toroidal piston chamber rotates;
- a second stationary cover that encircles and seals said open top of said second rotary 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 of said two second partitions;
- wherein said second rotary toroidal piston chamber is configured to rotate by reacting directly to continuous hydraulic force on said two second stationary pistons;
- wherein said first and second bidirectional rotary hydraulic motor/pump devices are mechanically connected in series to operate as a pressure multipliers with high multiplication, 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 two piston hydraulic pump.