Rooftop Wind Turbine with Dynamic Flow Regulator
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Solution Overview
Problem
Large-scale Horizontal Axis Wind Turbines (HAWTs) cause visual intrusion, safety concerns, bird and bat fatalities, radar disruptions, noise pollution, and are vulnerable to extreme weather due to their size and exposure, with existing rooftop wind turbines offering limited protection and inefficient energy generation.
Innovation Solution
A wind turbine assembly with a cylindrical rotor housed in a secured building, featuring a flow regulator that can orientate between fully open, closed, and partially open positions to optimize energy generation, protected by a housing that capitalizes on the roof ridge 'pinch effect' for enhanced wind speed and reduces visual impact, noise, and mechanical complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the housing provides limited protection to the rotors, then the structure remains simple, but the wind turbine is vulnerable to damage in high winds
Solution Approach 1:
The flow regulator is designed to dynamically adjust its position based on wind conditions. It can rotate between a wind-facing position (allowing full wind flow for energy generation), a partially closed position (restricting wind flow to control rotor speed), and a wind-shielding position (blocking wind to protect the rotor). This dynamic adaptability resolves the contradiction by providing reliable protection only when necessary, while maintaining structural simplicity.
2Object-affected harmful factors
If the wind turbine is located on buildings, then visual intrusion and safety concerns are reduced, but protection from extreme weather is worsened
Solution Approach 1:
The flow regulator dynamically responds to extreme weather conditions by detecting high wind speeds and automatically rotating to the wind-shielding position. This active protection mechanism allows rooftop turbines to survive extreme weather events that would otherwise damage or destroy them, resolving the vulnerability issue while maintaining the benefits of rooftop location.
Solution Approach 2:
The flow regulator is designed to automatically detect and respond to wind conditions without human intervention. The control system monitors wind speed and autonomously adjusts the flow regulator position, enabling the turbine to self-protect during extreme weather events and eliminating the need for manual monitoring or intervention.
3Reliability
If a mechanically operated mechanism is used for wind attenuation, then protection is provided, but manufacturing tolerances and mechanical wear affect reliability
Solution Approach 1:
The flow regulator employs a simplified mechanical rotation mechanism with only two primary positions (wind-facing and wind-shielding), reducing the complexity compared to multi-position or continuously adjustable mechanisms. This simplified design minimizes the impact of manufacturing tolerances and mechanical wear while maintaining effective protection capability.
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 solution provides a visually less intrusive, safer, and more efficient wind energy generation system with reduced noise and mechanical complexity, capable of optimizing energy production across varying wind conditions, protecting the rotor from high winds, and ensuring reliable operation with automatic flow regulation.
Implementation Method 1
The rotor is operable to rotate about an axis in response to wind flow
Implementation Method 2
which capitalizes on the roof ridge 'pinch effect' for enhanced wind speed
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A wind turbine assembly comprising, an elongate generally cylindrical rotor operable to rotate about an axis, an elongate rotor housing that houses the rotor and which is adapted to be secured to a roof, and a flow regulator adapted to regulate wind flow to the rotor, wherein the flow regulator is orientatable in an open orientation, a closed orientation and a partially open orientation.