Lunderskov, Denmark
Lunderskov, Denmark

LM Wind Power is the largest manufacturer of wind turbine blades in the world. LM Wind Power has manufactured more than 160,000 blades since 1978.On 11 June 2010, LM Wind Power took part in setting an aviation record. They commissioned the An-225 to carry the world's longest piece of air cargo, as it flew two new 42-meter wind turbine blades from their factory in Tianjin, China to their test facility in Lunderskov, Denmark. Wikipedia.

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A blade (10) for a rotor of a wind turbine (2) having a substantially horizontal rotor shaft, said rotor comprising a hub (8), from which the blade (10) extends substantially in a radial direction when mounted to the hub (8), the blade having a longitudinal direction (r) with a tip end (16) and a root end (14) and a transverse direction is presented. The blade further comprises: a profiled contour including a pressure side and a suction side, as well as a leading edge (18) and a trailing edge (20) with a chord having a chord length (c) extending there between, the profiled contour, when being impacted by an incident airflow, generating a lift, wherein the profiled contour is divided into: a root region (30) having a substantially circular or elliptical profile closest to the hub, an airfoil region (34) having a lift-generating profile furthest away from the hub, and a transition region (32) between the root region (30) and the airfoil region (34), the transition region (32) having a profile gradually changing in the radial direction from the circular or elliptical profile of the root region to the lift-generating profile of the airfoil region. A shoulder (40) having a shoulder width (W) is located at the boundary between the transition region (32) and the airfoil region (34). The blade (10) has a blade length (L), and the profiled contour comprises a local relative thickness defined as the local ratio between a maximum profile thickness (t) and the chord length (c). The ratio between the shoulder width (W) and the blade length (L) being less than or equal to 0.075, and the relative thickness (t/c) in a blade length interval of 0-0.8L is at least 22%.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ENERGY.2012.2.3.2 | Award Amount: 11.48M | Year: 2013

The objective of the WINDTRUST project is to demonstrate the technical and economic feasibility of innovative and more reliable solutions for multi MW wind turbines in order to improve the competitiveness of wind energy technologies. The selected components of the wind turbine are the rotor (specifically the blade), power electronics (specifically the converter) and Control and communication system (specifically the controller system). The project will demonstrate the reliability of the proposed solution on an onshore 2MW prototype turbine and will also extrapolate conclusion to larger wind turbine and off-shore locations. To reach such objectives, the project will join a 9 partnership European consortium, led by key industrial stakeholders of the wind turbine industry, GAMESA, LM and SEMIKRON, in cooperation with a group of R&D centres and SMEs with complementary skills and expertise to support design, testing and dissemination activities. The project partners are strongly committed to work together and to include all the necessary resources to deal with the scheduled project work plan.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ENERGY.2013.2.3.1 | Award Amount: 9.20M | Year: 2013

The motivation for the AVATAR project lies in the fact that upscaling wind turbine designs towards 10-20 MW requires radical innovations to make this feasible. Many of these innovationshave a strong aerodynamic component and can be considered as unconventional from an aerodynamic point of view. As such the analysis of the resulting rotor designs falls outside the validated range of applicability of the current state of the art computational aerodynamic tools. The overall objective of the AVATAR project is then to evaluate, validate and improve aerodynamic and aero-elastic tools to ensure applicability for large wind turbines. The capability of these models to produce valid load calculations at all modeling complexity levels needs to be demonstrated. This leads to a number of secondary objectives related to the assessment and evaluation of such designs eventually culminating in new design guidelines. In the AVATAR workplan aerodynamic models are developed and calibrated for all aspects which play a role in the design of large wind turbines. Thereto the entire chain of aerodynamic modelling is mobilized ranging from computational efficient engineering tools to very advanced high fidelity but computationally expensive tools. The development of new comprehensive models is based on a philosophy in which the high fidelity tools feed results towards the lower complexity tools where furthermore (wind tunnel and field) measurements are used to validate and improve the models. The capabilities of the resulting tools are demonstrated on a large scale rotor with and without flow control devices. The project is carried out by an absolute world class consortium since it consists of a selected group of participants from the subprogram aerodynamics of EERA Joint Program Wind (European Energy Research Alliance) in which all leading institutes on the field of aerodynamics participate, complimented with two leading industrial partners.


Patent
LM Wind Power | Date: 2014-06-20

A transportation and storage system for a wind turbine rotor blade comprises a tip end frame assembly comprising a tip end receptacle and a tip end frame. The tip end receptacle comprises an upwardly open tip end-receiving space for receiving a portion of the tip end of the blade and having a supporting surface for supporting the blade, a lower surface allowing the tip end receptacle to rest upright on a substantially horizontal surface, such as the ground, and releasable retaining means for releasably retaining the tip end of the blade in the receiving space of the tip end receptacle. The tip end frame comprises an upwardly open receptacle-receiving space for receiving the receptacle and provided with positioning means for positioning the receptacle in the tip end frame. A base part defines a bottom surface allowing the tip end frame to rest upright on the ground.


A wind turbine includes a number of blades and an optical measurement system comprising a light source, such as a laser, an optical transmitter part, an optical receiver part, and a signal processor. The light source is optically coupled to the optical transmitter part, which includes an emission point for emitting light in a probing direction. The optical receiver part comprises a receiving point and a detector. The optical receiver part is adapted for receiving a reflected part of light from a probing region along the probing direction and directing the reflected part of light to the detector to generate a signal used to determine a first velocity component of the inflow. The emission point is located in a first blade at a first radial distance from a center axis, and the receiving point is located in the first blade at a second radial distance from the center axis.


Manufacturing line for manufacturing wind turbine blades having a composite shell structure comprising a matrix material and a fibre reinforcement material by use of a resin transfer moulding process is used to assemble wind turbine blades formed in a number of moulds, including at least a first mould part having a first mould cavity. A gantry moves along the manufacturing line, in which the manufacture includes a) arranging fibre reinforcement material in the first mould cavity of a first mould using the gantry means, b) moving the gantry means along the manufacturing line to a second mould, c) supplying curable matrix material into the first mould cavity of the first mould, while substantially simultaneously arranging fibre reinforcement material in the first mould cavity of a second mould using the gantry means. The manufacturing line comprises a plurality of moulds for forming wind turbine blades.


A blade for a rotor of a wind turbine has a profiled contour including a leading edge and a trailing edge as well as a pressure side and a suction side, the profiled contour generating lift when impacted by an incident airflow. The profiled contour is divided into a root region with a substantially circular profile closest to the hub, an airfoil region with a lift generating profile furthest away from the hub, and a transition region between the root and airfoil regions. The suction side has a first zone which extends substantially in the direction of the incident airflow, and which is positioned in a zone of a cross-flow. The first zone includes a first barrier generating means adapted to generating a barrier of airflow, which extends essentially in the direction of the incident airflow and is of sufficient strength and length so as to effectively reduce the cross-flow.


Patent
LM Wind Power | Date: 2014-03-07

Producing a composite structure comprising fibre reinforced material impregnated with liquid resin by means of vacuum assisted resin transfer moulding, by method of: providing a forming structure comprising a rigid mould part and a second mould part; placing the fibre material in the rigid mould part; sealing the second mould part against the rigid mould part, forming a mould cavity; connecting a source of uncured fluid resin to at least one resin inlet communicating with the mould cavity; connecting at least one vacuum outlet communicating with the mould cavity; evacuating the interior of the forming structure through at least one vacuum outlet, measuring at least one vacuum outlet airflow level; supplying uncured resin from the source of uncured resin to the mould cavity through at least one resin inlet so as to fill the mould cavity with resin; and curing the resin in order to form the composite structure.


A method of retrofitting vortex generators on a wind turbine blade is disclosed, the wind turbine blade being mounted on a wind turbine hub and extending in a longitudinal direction and having a tip end and a root end, the wind turbine blade further comprising a profiled contour including a pressure side and a suction side, as well as a leading edge and a trailing edge with a chord having a chord length extending there between, the profiled contour, when being impacted by an incident airflow, generating a lift. The method comprises identifying a separation line on the suction side of the wind turbine blade, and mounting one or more vortex panels including a first vortex panel comprising at least one vortex generator on the suction side of the wind turbine blade between the separation line and the leading edge of the wind turbine blade.


The invention relates to a method of cutting off laminate layers for use in a fibre-reinforced laminate object comprising a number of combined laminate layers, wherein, along a section of the at least one rim of the laminate layer, a tapering cut is performed through the thickness of the laminate layer, whereby the thickness of the laminate layer is reduced. Since not only the number of laminate layers, but also the thickness of the individual laminate layers are reduced, a laminate layer is accomplished that can be used in a laminate object, by which both the issues of areas rich in resin, air pockets and the risk of delamination are reduced. The invention also relates to a laminate layer for use in a fibre-reinforced laminate object comprising a number of combined laminate layers and a fibre-reinforced laminate object in the form of the blade of a wind turbine, wherein the blade of the wind turbine comprises a number of combined laminate layers.

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