Wind Turbine Blade Internal Heating for Ice Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ice protection systems for wind turbines are inefficient, costly, and difficult to retrofit, and existing methods like ethylene glycol sprays and pneumatic boots do not meet the energy and operational demands of wind turbines, leading to power loss and mechanical failures due to ice accumulation.
Innovation Solution
An internal heating system for wind turbine blades using a heater, blower, duct, and control subsystem, with sensors and a control system to monitor and adjust the system's operation based on environmental conditions, ensuring efficient de-icing and anti-icing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external ice protection systems are installed on the blade exterior, then ice protection function is provided, but aerodynamic properties deteriorate and power generation is lost
Solution Approach 1:
The heating elements and insulation layers are nested within the existing blade structure during manufacturing, allowing the ice protection system to be integrated inside the blade rather than mounted externally. This eliminates aerodynamic interference while maintaining ice protection functionality.
Solution Approach 2:
The patent replaces mechanical/external heating systems with electric heating elements embedded in the blade. The electric heating system uses flexible heating cables or resistive heating elements that can be installed within the blade structure, substituting external mechanical systems with internal electrical systems that have no aerodynamic impact.
2Reliability
If devices are embedded within fiberglass layers of the blade, then ice protection is integrated, but retrofit becomes difficult and costly
Solution Approach 1:
The heating elements and insulation are installed during the blade manufacturing process before the final fiberglass layers are applied. This preliminary installation allows the ice protection system to be integrated into the blade structure without requiring complex retrofits later, as the heating elements can be positioned and secured while the blade is still being constructed.
Solution Approach 2:
The patent uses flexible heating elements with varying resistance parameters that can be adjusted during installation to match different blade configurations. This flexibility allows the same heating system design to be adapted to various blade types and sizes, simplifying both manufacturing and potential retrofit scenarios.
3Reliability
If mass is added to the blade tip for ice protection, then ice protection capability is improved, but blade dynamics and power generation are negatively affected
Solution Approach 1:
The ice protection system components (heating elements, insulation, wiring) are nested within the existing blade hollow structure, utilizing the internal volume of the blade without adding external mass. This approach maintains the blade's original mass distribution and aerodynamic characteristics while providing ice protection functionality.
Solution Approach 2:
The patent replaces mass-intensive external ice protection structures with lightweight electrical heating systems. The electric heating elements have negligible mass compared to external mechanical ice protection devices, thereby avoiding negative impacts on blade dynamics and power generation while effectively preventing ice accumulation.
4Reliability
If conventional de-icing systems are used, then ice removal is achieved, but energy consumption exceeds available electrical capacity
Solution Approach 1:
The heating system applies heat locally only to the specific regions of the blade where ice accumulation occurs (primarily the leading edge and upper surface). By concentrating heating power in these critical areas rather than heating the entire blade, the system achieves effective ice removal while minimizing overall energy consumption to levels compatible with wind turbine electrical capacity.
Solution Approach 2:
The de-icing system operates periodically rather than continuously, activating heating elements only when ice detection sensors indicate ice accumulation. This periodic operation significantly reduces energy consumption compared to continuous heating, while still maintaining reliable ice removal capability by intervening only when necessary.
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 system effectively prevents and removes ice from wind turbine blades, reducing power loss and mechanical failures by optimizing energy use and integrating with existing wind turbine power systems.
Implementation Method 1
a heater disposed in an interior of the wind turbine blade and for heating air
Implementation Method 2
a blower disposed in the interior of the wind turbine blade and for moving the air across the heater to generate a heated airflow
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Wind turbine ice protection systems and methods are provided. An ice protection system for heating a wind turbine blade includes: a heater disposed in an interior of the wind turbine blade, the heater for heating air; a blower disposed in the interior of the wind turbine blade and for moving the air across the heater to generate a heated airflow; a duct disposed in the interior of the wind turbine blade, the duct for receiving the heated airflow and releasing the heated airflow into the interior of the wind turbine blade; and an electrical control subsystem disposed in the wind turbine for controlling one or more components of the ice protection system.