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Ocean Energy, Direct Tide Currents Energy Generating Systems

 

 

Direct Tide Currents Energy Generating Systems

Another type of tide current turbine devices are the depicted on system “A“and “B” below in which the currents generating by the tides are managed as rivers to generate energy, in the proposed system “A” the turbine is anchored on the sea floor and by two mechanical arms, the turbine is kept at the optimum current flow dept to catch the most of the energy, this system is specially suited for shallow waters with no more per say 50 meters deep or close to the shore due to difficult of the lever mechanism involved. Some ocean currents are  very wide and powerful and can provide a lot of energy if the system is properly designed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Another variation of the system “A” is the system B, in which the turbine is suspended from a floater to adjust the turbine to an optimum currents depth, the floater and the turbine arrangement is kept in position with a cable anchored to the sea floor, the system permits the turbine to be adjusted to the proper height as the sea level changes. The turbine used for this application has to be also designed to run with low speed flows. This system is better suitable to deeper water as compared with system A, with no specific depth limit. The turbine can be directly attached to an electrical generator, a water pump or to any other energy converter mechanism.  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is important to mention that these systems have a lot of potential as a viable source of electrical power generation, cost and environmentalists have influenced the slow development and applications of this technology in view of concerns for the marine life and other ecological impacts.

To effectively make use of the relatively slow tidal currents, tidal turbines are designed to run with tidal currents speed in the range  of 6.0 to 10.5 km per hour or 1.7 - 3.0 meters per second.

The department of energy of USA reports that a tide turbine with a diameter of 15 meters with a current speed of about 8 km/sec produces as much energy as a wind generator  with a 60 meter wind turbine, the reason for this is the higher density of the water, more density means more mass, more mass means more power. The best location for the installation of a tide turbine is near the shore at about 10 to 30 meters deep.

 

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System A, Suited for Shallow Waters

Reversal

 Turbine

Sea bottom

System

Anchor

Floater Tank

Submarine Current

System B, Well Suited for Deep Waters

Tide level