Installation for harvesting energy of tides (IHET) in...

Rotary kinetic fluid motors or pumps – With means for controlling casing or flow guiding means in... – Natural fluid current force responsive

Reexamination Certificate

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Details

C415S007000, C415S908000, C416S085000

Reexamination Certificate

active

07661922

ABSTRACT:
Installations for harvesting energy of river and ocean tidal currents consist of multiple Darrieus type turbines with funnels, which are located inline on the river or ocean bottom and oriented perpendicular to direction of water movement due to tide or river current. Use of Darrieus type turbines with funnels significantly increases efficiency of energy utilization of water streams in comparison versus system not utilizing funnels. Use of greater number of Darrieus turbines operating in line allows to utilize more powerful gearbox and generator, thus improving economics of their operation. For the purpose of simplification the regular maintenance of the system the generator and all auxiliary systems are located above water, except 90-degrees gearbox. To prevent water entering 90-degrees gearbox it always is under air pressure slightly above hydrostatic pressure of water above it. To prevent lost of power generating capacity, due to accommodation of the growth on the turbine blades surface, special blade-cleaning machine operating in semi-automated mode is introduced.

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