Wind Turbine Rotor Blade Heating Sensor Relocation
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Solution Overview
Problem
Existing wind turbine rotor blade heating systems face challenges in achieving uniform temperature distribution without excessive energy consumption and risk of overheating, particularly due to the placement of temperature sensors near the blade tip, which increases the risk of damage and maintenance costs.
Innovation Solution
The design relocates the temperature sensor to a section near the blade root, where a maximum temperature is achieved, and uses a multiplicity of insulated heating conductors with varying surface densities to ensure efficient heating and prevent overheating, allowing for easier maintenance and reduced energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature sensors are arranged near the blade tip to monitor high flow speed areas, then temperature monitoring capability is improved, but the risk of lightning strike damage and maintenance costs increase
Solution Approach 1:
The temperature sensor is extracted from the blade tip area and relocated to the blade root area, removing it from the hazardous lightning-prone zone while preserving its temperature monitoring function in a safe location
Solution Approach 2:
The blade structure itself acts as an intermediary, conducting heat from the blade tip heating area to the blade root where the sensor is located, allowing indirect temperature monitoring without direct sensor exposure to lightning risks
2Reliability
If heating power is increased near the blade tip to counteract high flow speeds, then de-icing effectiveness is improved, but the risk of local overheating and energy consumption increase
Solution Approach 1:
The temperature sensor provides continuous feedback on the actual temperature conditions in the blade, enabling the control system to adjust heating power dynamically and prevent local overheating while maintaining de-icing effectiveness
Solution Approach 2:
The heating control system changes the heating parameter (power level) based on temperature feedback, reducing power when sufficient heating is achieved and preventing overheating while maintaining effectiveness
3Measurement precision
If temperature sensors are arranged near the blade tip, then temperature monitoring is improved, but maintenance accessibility and repair costs worsen
Solution Approach 1:
The temperature sensor is extracted from the inaccessible blade tip area and installed in the blade root area, making it easily accessible for maintenance and repair while preserving temperature monitoring capability through thermal conduction
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 ensures reliable and safe operation by maintaining a uniform temperature distribution along the rotor blade while minimizing energy usage and reducing maintenance costs by avoiding the need for sensors near the blade tip.
Implementation Method 1
supplying electrical energy to the electrical heating device
Data Source
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AI summary
Wind turbine rotor blade with an electric heating device for heating a heatable surface area of the wind turbine rotor blade and a temperature sensor, wherein the electric heating device is designed such that during operation of the wind turbine rotor blade a maximum temperature is reached in a section of the surface area near the blade root in which the temperature sensor is located.