Provided is an arrangement for discharging current due to a lightning stroke at a tip add-on of a rotor blade of a wind turbine, the arrangement including a conductor adapted to conduct the current due to the lightning stroke; an insulation arranged around the conductor, the insulation with the conductor being arrangeable within the tip add-on.

A building component system including a rigid plastic or fiberglass (FRP) form made from one of various shapes, an example of one such shape having an arch in each of two perpendicular vertical planes and having a plurality of protrusions configured to engage concrete poured on top of the rigid plastic form. The plastic is recycled plastic from wind turbine blades or consumer products such as plastic bottles. The plastic can be fiber reinforced such as an FRP (fiberglass reinforced plastic). The system also includes concrete poured on top of the form and cured to bind to the form at least at the plurality of protrusions, thereby forming an arched ceiling for a first story of a building and a flat roof or flat floor for a second story of a building. Bridge decking is another application, for use in infrastructure.

Provided is an arrangement for discharging current due to a lightning stroke at a tip add-on of a rotor blade of a wind turbine, the arrangement including a conductor adapted to conduct the current due to the lightning stroke; an insulation arranged around the conductor, the insulation with the conductor being arrangeable within the tip add-on.

The present invention provides a method of repairing a bearing bore defined by an inner surface of a bearing housing, for instance a bearing housing that is part of a wind turbine. The method includes applying a liquid resin to at least part of the inner surface of the bearing housing. The method includes mounting a bore insert in the bearing bore, where the bore insert includes an arcuate portion having an edge positioned along a line of required radius of the bearing bore, so that the liquid resin fills a gap between the inner surface of the bearing housing and the edge of the arcuate portion of the bore insert. The method includes removing the bore insert from the bearing bore after the liquid resin has solidified to repair the bearing bore to the required radius. Advantageously, the invention provides a relatively simple and inexpensive method for repairing a bearing bore that has suffered wear, that may be performed on-site and which obviates the need for potentially expensive component replacement of the bearing housing.

A method, a repair device and a repair system for repairing a corrosion damage of a surface of an object exposed to weather. The method includes laserless pre-cleaning of the surface with the corrosion damage, laser cleaning of the surface with the corrosion damage and coating of the surface treated by laser cleaning with a protective layer.

A method of retrofitting a wind turbine having a tower and a first energy generating unit with a second energy generating unit. The method includes analyzing a first natural frequency of the tower relative to first rated operation frequencies of the tower having the second energy generating unit; when the first natural frequency lies within the first rated operation frequencies, modifying one or both the tower and the second energy generating unit so that the modified one or both the tower and the second energy generating unit have a second natural frequency and second rated operation frequencies that do not overlap; and replacing the first energy generating unit with the second energy generating unit.

The present invention provides a method of repairing a bearing bore defined by an inner surface of a bearing housing, for instance a bearing housing that is part of a wind turbine. The method includes applying a liquid resin to at least part of the inner surface of the bearing housing. The method includes mounting a bore insert in the bearing bore, where the bore insert includes an arcuate portion having an edge positioned along a line of required radius of the bearing bore, so that the liquid resin fills a gap between the inner surface of the bearing housing and the edge of the arcuate portion of the bore insert. The method includes removing the bore insert from the bearing bore after the liquid resin has solidified to repair the bearing bore to the required radius. Advantageously, the invention provides a relatively simple and inexpensive method for repairing a bearing bore that has suffered wear, that may be performed on-site and which obviates the need for potentially expensive component replacement of the bearing housing.

Wind turbine bulkhead removal systems and methods are provided. The bulkhead removal system includes a bulkhead removal device and control subsystem. The bulkhead removal device includes a drilling subsystem with a drill for drilling at least one bulkhead within a wind turbine blade and an extension subsystem which is physically connected to the drilling subsystem and releasably securable to the wind turbine blade. The extension subsystem moves the drilling subsystem forwards and backwards along a length of the wind turbine blade to position the drill for drilling through each bulkhead. The control subsystem controls the operation of the drilling subsystem and the extension subsystem. The bulkhead removal system may also include a connection subsystem for connecting power and control components of the drilling and extension subsystems to a power source and to the control subsystem.

A wind turbine blade is provided, including a hollow blade body with a blade root and a base plate arranged at a root-side end section of the blade, which base plate includes a manhole through which the interior of the blade is accessible, wherein the base plate is provided with mounting means arranged at the or adjacent to the manhole and adapted to directly or indirectly mount at least one ladder to the base plate.

The invention relates to a photovoltaic module (16) comprising at least one recycled blade of a horizontal axis wind turbine or a section of a recycled blade of a horizontal-axis wind turbine which forms a beam (25), characterised by a plurality of cross-members (26) secured to the beam (25), each cross-member bearing photovoltaic panels (18).