Vertical Axis Wind Turbine Blades With Open Back Pocket

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Solution Overview

Problem

Existing vertical axis wind turbine systems lack efficiency in capturing wind energy due to high wind resistance, particularly when wind direction frequently changes.

Innovation Solution

The design incorporates elongated blades with a pocket at the trailing edge to capture wind and a closed leading edge to cut through wind efficiently, allowing for vertical stacking with spaces between blades to reduce wind resistance and increase efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If blades are vertically stacked to increase effective area, then wind energy capture is improved, but wind resistance increases

Engineering Contradiction:

Improvewind energy capture efficiencyVSAvoidwind resistance

Core Design Contradiction:

ProductivityVSForce

Solution Approach 1:

The blade is segmented into distinct functional zones: a closed leading edge for cutting through wind, a pocket section for receiving and storing wind, and an open trailing edge for releasing wind. This segmentation allows each portion to perform its specific function optimally, reducing overall wind resistance while maintaining energy capture capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The blade design transitions from a traditional two-dimensional planar structure to a three-dimensional configuration with vertical stacking. Multiple blades are arranged at different vertical levels, creating a multi-dimensional wind capture system that increases effective area without significantly increasing horizontal wind resistance.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Force

If closed leading edge is used to cut through wind, then wind resistance is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improvewind resistanceVSAvoidblade manufacturing complexity

Core Design Contradiction:

ForceVSEase of manufacture

Solution Approach 1:

The blade exhibits local quality variations along its length: the leading edge has a closed, aerodynamic profile for cutting through wind, the middle section forms a pocket structure for wind reception, and the trailing edge is open for wind release. Each local portion is optimized for its specific function, balancing manufacturing feasibility with performance requirements.

Inventive Principle:

Principle #3Local quality

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

This configuration enhances the turbine's ability to harness wind energy by reducing wind resistance and increasing efficiency, making it suitable for various applications such as electricity generation and mechanical work.

Implementation Method 1

a pocket to receive wind

Methodology Applied

Scientific EffectWind capture:

Implementation Method 2

a closed edge that cuts through the wind with greater efficiency

Methodology Applied

Scientific EffectAerodynamic cutting:

Data Source

PatentUS10408190B2Wind turbine with open back blade

Publication Date: 2019.09.10 DEIOMA ROBERT B

AI summary

Turbine systems comprising at least one blade that (i) has a pocket to receive wind and (ii) a closed edge that cuts through the wind with greater efficiency are disclosed. The blades can be stacked along a central hub to increase the effective area of the turbine blade system. When stacked, the blades are spaced apart in an amount sufficient to allow wind to pass between the blades as the closed edge of the blade cuts through the wind thereby decreasing wind resistance.