Venturi Vortex Turbine for Low Wind Speed Efficiency
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Solution Overview
Problem
Horizontal and Vertical Axis Wind Turbines face inefficiencies due to space requirements, blade damage from bird strikes, ice buildup, and challenges in starting up in low wind speeds, with a need for improved wind direction alignment and energy harvesting.
Innovation Solution
A cyclonic aeolian vortex turbine design utilizing a cavity shell that leverages the Venturi, Bernoulli, and Coanda effects to accelerate wind into a vortex, creating a suction effect for increased energy harvesting and efficient operation, with a yaw system for optimal wind direction alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional horizontal or vertical axis wind turbines are used, then wind energy can be harvested, but they require large amounts of space and are susceptible to blade damage from bird strikes and ice buildup
Solution Approach 1:
The turbine is divided into a rotor assembly and a separate cavity shell, with the rotor encased within the shell structure. This segmentation allows the blades to be protected within the enclosed cavity while maintaining exposure to wind flow through strategically positioned openings, thereby reducing space requirements and protecting against bird strikes and ice damage
Solution Approach 2:
The rotor assembly is nested within the cavity shell, creating a protective enclosure around the vulnerable blade components. This nested configuration allows the turbine to operate in a more compact footprint while the outer shell provides protection against environmental hazards such as bird strikes and ice buildup
2Productivity
If the cavity shell uses traditional intake openings, then wind can enter the turbine, but the efficiency of wind energy harvesting is insufficient
Solution Approach 1:
The traditional mechanical intake opening is replaced with a Venturi tube that utilizes fluid dynamics principles (Venturi effect, Bernoulli effect, Coanda effect) to accelerate wind flow. This substitution transforms the intake mechanism from a simple opening to a sophisticated flow control system that increases wind velocity and energy capture efficiency while minimizing energy losses through optimized flow paths
Solution Approach 2:
The Venturi tube modifies the physical parameters of wind flow by creating a constricted section that increases flow velocity and decreases pressure. This parameter change optimizes the kinetic energy of the wind entering the cavity, thereby improving harvesting efficiency and reducing energy losses
3Adaptability or versatility
If the turbine operates in low wind speed environments, then it can generate power in more conditions, but it struggles to start up without additional hardware
Solution Approach 1:
The Venturi tube configuration creates a self-starting mechanism where the natural wind flow through the constricted section generates sufficient velocity and pressure differential to initiate rotor rotation without external assistance. The system serves itself by using the incoming wind to create the conditions necessary for startup, eliminating the need for additional hardware while maintaining adaptability to low wind speed environments
4Stability of the object's composition
If the vortex expulsion is slow, then the vortex remains stable, but the pressure inside the shell increases reducing the suction effect
Solution Approach 1:
The cavity shell incorporates dynamic flow control features that allow the vortex to be maintained in a stable state while simultaneously providing pathways for controlled expulsion. The system balances vortex stability with pressure management by creating flow paths that facilitate continuous air exchange, preventing pressure buildup that would reduce the suction effect while maintaining the rotational vortex structure
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
Enhances wind energy harvesting efficiency, reduces turbine size for lower wind speed operation, and minimizes damage from high winds without additional hardware, while maintaining stability of the vortex for efficient power generation.
Implementation Method 1
the constricted section being adapted to increase a velocity of air passing through the Venturi tube and cause an expulsion of air out of the Venturi tube
Implementation Method 2
the first air pressure within the hollow interior is lower than a second air pressure outside of the wind harvesting assembly, resulting in a pressure differential that causes a suction effect
Implementation Method 3
a second portion of air is ingested into the wind turbine and forced to become a vortex having a higher speed than the ingested air, the vortex being a spiral air stream traveling towards the open bottom end
Implementation Method 4
the rotation of the plurality of vertical wind turbine blades is caused when a second portion of air is ingested into the wind turbine and forced to become a vortex
Data Source
AI summary
A wind harvesting assembly for a wind turbine, having: a Venturi tube having a hollow interior having a first air pressure; an open top end having a first diameter; an open bottom end having the first diameter; a tube length spanning between the open top end and the open bottom end; and a constricted section located above the bottom end, the constricted section adapted to increase a velocity of air passing through by having a second diameter smaller than the first diameter; a plurality of vertical wind turbine blades arranged around the Venturi tube, wherein each vertical blade of the plurality of vertical wind turbine blades is associated with permanent magnets.