In an embodiment, an energy harvesting apparatus includes a housing, a blade, and a power generation unit, which may include a power generation motor and a piezoelectric power generator. In the energy harvesting apparatus according to an embodiment, electrical energy can be generated by rotation of a blade by a slipstream generated during travel of a mobility vehicle. Electrical energy can be additionally generated by pressure and impact generated during rotation of the blade. When the blade is rotated at high speed as the driving speed of the mobility vehicle increases, pressure and impact can be reduced, thereby preventing damage to the blade or a piezoelectric element and thus improving the durability thereof.

A power generation system to improve the degree of freedom of installation is described herein. A power generation system comprises: first fluid chambers that contain a fluid; a second fluid chamber that contains the fluid; a communication flow channel that communicates the first fluid chambers and the second fluid chamber with each other; first pistons that are disposed such that the fluid in the first fluid chambers can be pressed; a second piston that is disposed such that the fluid in the second fluid chamber can be pressed; and power generation modules that convert pressing forces of the corresponding first pistons into electricity using piezoelectric elements. The power generation elements of the power generation modules generate power when the second piston is pressed, and the pressing force is transmitted to the first pistons via the fluid, and the piezoelectric elements are indirectly pressed due to the force thus transmitted.

A transmission belt is described which comprises a body made of a first elastomeric material, a plurality of teeth and a plurality of longitudinal cords buried in the body of the belt and a back. The belt has a working surface on said teeth and the working surface is at least partially covered by a covering made of a plastic and/or metal material. Defining the area comprised between the plane defined by the neutral axis of the cords, the working surface and the median transverse planes of two adjacent teeth as the unitary longitudinal section, the covering preferably occupies at least 25% of the unitary longitudinal section.

The present disclosure discloses a bionic cuttlefish-typed underwater detection robot, including a bionic cuttlefish-typed body structure, a piezoelectric energy capture device, a circuit rectification and storage assembly and a power control assembly. The bionic cuttlefish-typed body structure includes a head and a main body; the piezoelectric energy capture device includes piezoelectric ceramic elements arranged around the main body and PVDF floating belts, and an end of each piezoelectric ceramic element is connected to a spherical spoiler component, the PVDF floating belts are evenly distributed at a tail end of the main body. The present disclosure adopts piezoelectric ceramic elements with spoiler components and PVDF floating belts to generate electricity, converts wave energy and ocean current energy into electric energy, powers the power control assembly of the detection robot. It has high power generation efficiency and stable current, and realizes the autonomous operation of the underwater detection robot.

The present disclosure relates to a wind power generator using a piezoelectric element. A wind power generator using a piezoelectric element according to an embodiment of the present disclosure, includes: a plurality of panels which are sequentially stacked, a wing-shaped piezoelectric member disposed between the plurality of panels for generating electrical energy by external force and a vibrating ball container disposed on one surface of the wing-shaped piezoelectric member and including a plurality of vibrating balls, wherein a hole through which wind can pass is formed in at least one surface of the vibrating ball container.

Systems and methods for use in capturing energy from natural resources. In one form, the systems and methods capture energy from natural resources, such as movement of fluid in a body of water, and convert it into electrical energy.

Systems and methods for converting vibrations to electrical energy, including a mechanical device producing vibrations during operation, a flexible piezoelectric sheet, and a junction box. The flexible piezoelectric sheet includes protective layers, piezoelectric element layers, electrode layers, and an adhesive layer to attach the flexible piezoelectric sheet to the mechanical device. The piezoelectric element layer converts vibrations into an electric charge and is provided between a first electrode layer and a second electrode layer which are physically separated from one another. The junction box includes an electrical circuit and battery and collects and stores generated electrical energy. Methods include converting vibrations from a mechanical device to electrical energy by disposing a flexible piezoelectric sheet on the mechanical device, electrically connecting the flexible piezoelectric sheet to a junction box, harvesting, and storing generated energy in the junction box, and providing stored energy to a device requiring power located at a wellsite.

A vibration power generation device that further improves power generation efficiency includes a vibration exciting body in which vibration is caused by a flowing fluid, a vibrated body that is oscillatable and connected to the vibration exciting body, and a power generator to generate electricity by oscillation of the vibrated body. The vibration exciting body is in proximity to a wall surface, and vibration is caused in the vibration exciting body by a fluid flowing along the wall surface.

An energy extraction arrangement, includes a surface defining a flow pathway, and a flap hingedly secured to the surface, the flap exposed to a fluid flow, during use. A borehole energy extraction system, including a non-diverted primary flow pathway for borehole fluids, a surface defining the flow pathway, and a flap hingedly secured to the surface, the flap exposed to a fluid flow, during use. A method for extracting energy from a non-diverted primary fluid flow, the method including deflecting solely by the primary fluid flow a flap hingedly connected to a surface defining in part a flow pathway for the primary fluid flow, and generating an electrical potential by the deflecting. A borehole system, including a borehole in a subsurface formation, a string in the borehole, and an energy extraction arrangement disposed within or as a part of the string.

Systems and methods for use in capturing energy from natural resources. In one form, the systems and methods capture energy from natural resources, such as movement of fluid in a body of water, and convert it into electrical energy.