Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
  • F03D—WIND MOTORS
  • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
  • F03D1/06—Rotors
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/70—Wind energy
  • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

• the invention relates to a blade for a windmill as disclosed in the preamble to claim 1.
• the windmill blade As disclosed in claim 1, by providing the blade of the windmill with a gelcoat which wholly or partially com ⁇ prises transparent UN-filtering material, the windmill blade thus achieved is one which is partly pervious to light within the normal, visual colour spectrum. There is also achieved a filtering out of the light's UN com ⁇ ponents, which hereby prevents degradation of the blade's fibre-glass structures. The required filtration of the light which falls on the blade is thus achieved solely by filtering out that part of the spectrum which is de ⁇ trimental to the fibre-glass construction.
• partly pervious to light is meant that the intensity of the light is not completely suppressed or phased out.
• the blade is thus not directly transparent, there is achieved a certain penetration of light, the re ⁇ sult being that the windmill blade does not appear in great contrast in relation to the given background, since this, regardless of the light conditions, will be re- fleeted. In the main, the tensile strength of the blade will remain unchanged.
• Normal fibre-glass consists of glass threads and a plastic mass.
• the plastic mass which is normally polyester, serves exclusively to hold the individual glass fibres in place, whereas it is the glass which de- termines the tensile strength of the fibre-glass.
• the individual fibre-glass structures are strongly influenced especially by UV light, and not to any significant degree by light from the humanly visible spectrum, which is why it is directly necessary to configure the plastic mass so that this is impervious with regard to light.
• the blade can be provided with a coating, a so-called gelcoat, which is impervious to light, and which can also be effected in any desired colour with a smooth and dirt- rejecting surface.
• a blade according to the invention is constructed of arranged fibre-glass structures mutually secured by a polyester, for example N 50 S, which is partly pervious to light. Over the fibre-glass structure there is used a pervious gelcoat, in that the gelcoat has a filtering effect in relation to UN light.
• a further blade according to the invention can be made of a polyester which is developed for the purpose, and which has even better translucency characteristics than the above-mentioned ⁇ 50 S.
• This polyester used together with the similarly mentioned gelcoat, thus optimizes the blade's characteristics of light perviousness while still fulfilling the demand with regard to the filtering out of UN light.

Landscapes

• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Wind Motors (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8155243

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (2)

• 1995
  • 1995-07-10 DK DK9500264U patent/DK9500264U4/da not_active IP Right Cessation
• 1996
  • 1996-07-05 AU AU64137/96A patent/AU6413796A/en not_active Withdrawn
  • 1996-07-05 WO PCT/DK1996/000307 patent/WO1997003287A1/en not_active Ceased

Patent Citations (2)

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