Bladeless Wind Generator Using Piezoelectric Cantilevers
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Solution Overview
Problem
Current wind power generators are inefficient, expensive, noisy, and difficult to transport and assemble, with existing bladeless designs exhibiting low conversion efficiency and high costs due to the need for air-liquid and liquid-solid interfaces in electro-kinetic systems.
Innovation Solution
A bladeless Wind Energy to Power (WEP) system utilizing piezoelectric materials, specifically a PVDF-brass-PVDF sandwich cantilever configuration within a unique air jet tunnel and phononic cascade structure, which converts wind motion into electrical power without mechanical moving parts, offering high efficiency and low cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electro-kinetic systems are used to convert wind motion to electrical power, then bladeless design is achieved, but conversion efficiency becomes very low
Solution Approach 1:
The patent replaces the electro-kinetic mechanism with a piezoelectric mechanism. Instead of using charged aerosols and liquid flows as in electro-kinetic systems, the invention uses piezoelectric materials that directly convert mechanical stress from wind-induced vibrations into electrical energy, eliminating the need for complex air-liquid and liquid-solid interfaces while dramatically improving conversion efficiency
Solution Approach 2:
The patent changes the fundamental operating parameter from electro-kinetic phenomena to piezoelectric phenomena. By using piezoelectric materials that generate electrical charge in response to mechanical stress, the system transforms the conversion mechanism entirely, achieving both bladeless operation and high efficiency without the energy losses inherent in electro-kinetic approaches
2Power
If traditional wind turbines are used, then power generation is achieved, but noise and maintenance requirements increase
Solution Approach 1:
The patent eliminates mechanical rotating blades and moving parts by using piezoelectric materials that directly convert wind-induced structural vibrations into electrical energy. This substitution of mechanical rotation with direct piezoelectric conversion removes the primary sources of noise generation while maintaining power generation capability
Solution Approach 2:
The patent extracts and removes the noisy mechanical components (rotating blades, bearings, generators) from the system. By using a bladeless design with piezoelectric elements integrated into the structure, the invention takes out the harmful noise-generating parts while retaining the essential power generation function
3Power
If traditional wind turbines are used, then power generation is achieved, but cost and difficulty of transport and assembly increase
Solution Approach 1:
The patent divides the wind energy conversion system into modular segments. The piezoelectric elements can be integrated into modular structural units that are easier to transport and assemble compared to traditional turbine systems. This segmentation allows for simplified deployment and reduced logistical complexity
Solution Approach 2:
The patent removes the complex mechanical transmission systems, gearboxes, and large rotating components that make traditional wind turbines difficult and expensive to transport and assemble. By extracting these complex mechanical subsystems and replacing them with distributed piezoelectric elements, the overall system complexity and transport requirements are dramatically reduced
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The WEP system achieves quiet operation, high energy conversion efficiency, low maintenance, and cost-effectiveness, making it a more adaptable and competitive alternative to traditional wind turbines, potentially reducing the cost of wind power to be comparable with fossil fuels.
Implementation Method 1
The approach is based on an adaptation of the piezoelectric effect—a well known property of certain materials to produce electrical power when they undergo strain and stress
Data Source
AI summary
In a first embodiment, a wind to energy conversion system is constructed out of a number of modular power units (110), each modular power unit (110) comprised of 36 air jet tunnels (106). Each air jet tunnel (106) is constructed using a cantilever array mounted in a cascaded frame (104) with each cantilever (102) attached on one edge to a window edge of the frame (104). The cantilever (102) is constructed of a brass (130) layer sandwiched between two layers, each layer composed of an electrode (126) attached to a Poly Vinylidene Fluoride (PVDF) (128) layer. Each modular power unit (110) is mounted in a case (108), and a set of cases are mounted in a panel (114) attached to a pedestal (116). The cantilever arrays (117) are wired together into electrical regulating circuits that generate power with a high wind to power conversion efficiency. Other embodiments are presented.