Generation of Electrical Power From Fluid Flows
First Claim
1. A device for the generation of electrical power from a fluid flow comprising a blunt body arranged to be disposed, in use, generally crosswise to the flow and carried by a support with freedom to oscillate in response to the shedding of a Karman vortex trail by the interaction of the body and flow, and an energy converter for converting the consequent oscillatory motion of the body and/or support into electrical energy.
1 Assignment
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Accused Products
Abstract
A device for the generation of electrical power from a fluid flow, and more particularly for harvesting power from flows downhole in oil or gas wells, comprises a cylinder or other blunt body (1) arranged crosswise to the flow and supported on the end of a sprung cantilever arm (3) held in a fixed mount, with freedom to oscillate in response to the shedding of a Karman vortex trail v from the′ body. The resultant motion of the body (1) and arm (3) is converted into electrical energy by piezoelectric material (5) which is attached to, and stressed by, flexure of the arm. Other arrangements of piezoelectric and inductive power generation from the oscillation of the device are described.
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Citations
31 Claims
- 1. A device for the generation of electrical power from a fluid flow comprising a blunt body arranged to be disposed, in use, generally crosswise to the flow and carried by a support with freedom to oscillate in response to the shedding of a Karman vortex trail by the interaction of the body and flow, and an energy converter for converting the consequent oscillatory motion of the body and/or support into electrical energy.
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2. (canceled)
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9. (canceled)
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12. (canceled)
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20-21. -21. (canceled)
Specification