Heating element for an outer surface of a wind turbine rotor blade
AssigneeNordex Energy GmbH
InventorsInes Runge, Konrad Sachse, Adrian Dibbern, Stefan Magnus
Life of this patent
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Abstract
A heating element for an outer surface of a wind turbine rotor blade, wherein the heating element has a length and a width. The heating element includes a carbon fiber layer having a plurality of slots subdividing the carbon fiber layer into consecutive band sections defining a current path between a first connecting portion and a second connecting portion. The first connecting portion is adapted to be connected to a first power supply line and the second connecting portion is adapted to be connected to a second power supply line. The current path has a length of at least twice the length of the heating element.
Claims12
A heating element for an outer surface of a wind turbine rotor blade, the heating element having a length and a width and comprising:
- a first connecting portion and a second connecting portion;
- a carbon fiber layer having a plurality of slots subdividing said carbon fiber layer into consecutive band sections conjointly defining a current path between said first connecting portion and said second connecting portion;
- said current path having a length of at least twice the length of said heating element;
- and,
- said first connecting portion being configured to be connected to a first power supply line and the second connecting portion being configured to be connected to a second power supply line,
- wherein at least one of said plurality of slots has a widened end section.
A heating element assembly for an outer surface of a wind turbine rotor blade, the heating element assembly comprising:
- a first power supply line and a second power supply line;
- a heating element having a length and a width and including:
- a first connecting portion and a second connecting portion;
- a carbon fiber layer having a plurality of elongated openings subdividing said carbon fiber layer into consecutive band sections conjointly defining a zig-zag current path between said first and second connecting portions;
- said first connecting portion being connected to said first power supply line and said second connecting portion being connected to said second power supply line;
- and,
- said current path having a length of at least twice the length of said heating element;
- wherein at least one of said elongated openings has a widening formed at an inner end of said at least one elongated opening to reduce current density in said current path next to the end of said at least one elongated opening and so prevent local overheating.
Dependencies are inferred from the claim text.