Patent ID: 6168373
Filing Date: 2001-01-02
Classification: F03B,F05B,F05C,Y02E,Y10S

Abstract:
A dual turbine unit for adjustable deployment in a path of water flow, comprising: a. a first turbine having a first turbine runner assembly, the first turbine runner assembly comprising a plurality of first turbine blades, a first turbine shaft in general axial alignment with the path of water flow, a first turbine hub for fixedly mounting the plurality of first turbine blades radially outwardly with respect to the axial alignment of the first turbine shaft, and at least one first modular turbine generator, coupled via a speed increaser to the first turbine shaft, for conversion of kinetic energy into electrical energy; b. a second turbine having a second turbine runner assembly, the second turbine runner assembly comprising a plurality of second turbine blades, a second turbine shaft in general axial alignment with the path of water flow, a second turbine hub for fixedly mounting the plurality of second turbine blades radially outwardly with respect to the axial alignment of the second turbine shaft, and at least one second modular turbine generator, coupled to the second turbine shaft via a speed increaser, for conversion of kinetic energy into electrical energy; c. a lightweight dual turbine shroud primarily constructed of at least one material from the group of materials including thermoplastics and fiberglass, the lightweight dual turbine shroud capturing the first turbine and the second turbine, the lightweight dual turbine shroud having a front edge facing the oncoming water flow and a rear edge proximate to a point of water discharge from the dual turbine unit; d. an augmnentor ring proximate to and integral with the rear edge of the dual turbine shroud, the augmentor ring extending radially outwardly with respect to the axial alignment of the respective first and second turbine shafts; and e. a hollow tubular ballasting member integral to the lightweight dual turbine shroud and disposed in substantially parallel alignment with the axial alignment of the first turbine shaft and the second turbine shaft, the hollow tubular ballasting member having a first end and a second end, the first end being sealed in a watertight fashion by a first end cap, the second end being sealed in a watertight fashion by a second endcap, whereby an inner wall of the hollow tubular ballasting member and the respective first and second endcaps define a watertight void in which a reversible polarity actuator is fixedly attached to the inner wall of the hollow tubular ballasting member, the reversible polarity actuator being functional to rotate a shaft connected to a ballast, whereby rotation of the shaft in a first direction moves the ballast within the void toward the first endcap and whereby rotation of the shaft in a second direction moves the ballast within the void toward the second endcap, which movement of the ballast changes the center of gravity of the dual turbine unit, thereby changing the attitude of the dual turbine unit.