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Improved electro-thermal heating elements

A heating element, electric heating element technology, applied in the direction of electrical elements, ohmic resistance heating, electric heating devices, etc., can solve problems such as affecting current flow, adverse heating pad and/or blade structure efficiency and health, overheating, etc.

Active Publication Date: 2020-02-14
VESTAS WIND SYST AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, cuts in the heating pad may result in the formation of hot spots which may be detrimental to the efficiency and health of the heating pad and / or blade structure
This cut affects the flow of current through the heating pad, which can cause localized overheating, i.e. a hot spot near the cut

Method used

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  • Improved electro-thermal heating elements
  • Improved electro-thermal heating elements
  • Improved electro-thermal heating elements

Examples

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Embodiment Construction

[0031] figure 1 A schematic diagram of a typical wind turbine 10 comprising an embodiment of a wind turbine blade 19 according to the invention is shown. Wind turbine 10 is mounted on foundation 12, which may be an onshore or offshore platform or foundation. The wind turbine includes a tower 14 having a plurality of tower sections. Nacelle 16 is located on top of tower 14 and is attached to the top of tower 14 . The wind turbine rotor connected to the nacelle 16 includes a hub 18 and at least one wind turbine blade 19, wherein figure 1 Three wind turbine blades are shown in , although any number of wind turbine blades 19 may be present depending on the design and implementation of the wind turbine 10 . The wind turbine blades 19 are connected to a hub 18 which in turn is connected to the nacelle 16 via a low speed shaft extending out of the front of the nacelle 16 .

[0032] In order to substantially prevent or reduce ice accumulation on wind turbine blades, the blades may...

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PUM

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Abstract

The present invention relates to methods and electro-thermal heating elements in which the electro-thermal heating element comprises a cut-out. Forming at least one multi-resistance patch for the cut-out and attaching the at least one multi-resistance patch to the electro-thermal heating element proximate to the cut-out.

Description

technical field [0001] The present invention relates to electrothermal heating (ETH) elements for wind turbine blades, and more particularly to preventing hot spots in ETH elements. Background technique [0002] Wind turbines use wind energy to generate electricity and can be located on land or at sea. Wind turbines in cold climates may be subject to icing events in which ice may form on the surface of the wind turbine blades due to the presence of extremely cold water on the cold surface. The accumulation of ice on the surface of the blade can lead to undesired consequences. For example, changes in the profile of wind turbine blades due to ice accumulation can reduce the rotational speed of the wind turbine. As a result, the wind turbine may operate below optimal speed and efficiency, which reduces the performance of the wind turbine. Also, the extra weight of ice accumulating on wind turbine blades may lead to fatigue and stress failure of the blades. [0003] Therefor...

Claims

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Application Information

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IPC IPC(8): F03D80/40B29C73/10H05B3/20
CPCF03D80/40H05B3/34H05B2203/037H05B2214/02Y02E10/72H05B3/0014H05B2203/007H05B2203/017
Inventor L·斯潘德利P·巴杰
Owner VESTAS WIND SYST AS