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Published April 26, 2022 | Granted patent
Patent Open

Flow energy harvesting devices and system


A flow energy harvesting system including a nozzle-diffuser defining a spline-shaped flow channel and a flow energy harvesting device in the spline-shaped flow channel of the nozzle-diffuser. The spline-shaped flow channel includes a converging portion, a diverging portion, and a constriction section between the converging and diverging portions. The flow energy harvesting device includes a flextensional member having a frame and a cantilever extending outward from the frame, and a stack of piezoelectric elements housed in an interior cavity defined in the frame. The cantilever is a non-piezoelectric material. The frame of the flextensional member is in the converging portion and the cantilever is in the constriction section of the spline-shaped flow channel. The frame is configured to deform and elongate the piezoelectric elements to generate a current based on the piezoelectric effect when a fluid flows through the spline-shaped flow channel and generates unbalanced forces on the cantilever due.

Patent History

2022-04-26: Application granted

Patent Classification

International Classification:
HOIL 41/113 ( 2006.01 ) ; H02N 2/18 ( 2006.01 ) ; E21B 41/00 ( 2006.01 )

U.S. Classification:
HO2N 2/185 ( 2013.01 ) ; E21B 41/0085 ( 2013.01 ) ; HOIL 41/113 ( 2013.01 )

Additional Information

Patent number:  US11316447B2

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Additional details

January 24, 2024
January 24, 2024