Acciona, S.A. is a Spanish conglomerate group dedicated to civil engineering, construction and infrastructure.The company was founded in 1997 through the merger of Entrecanales y Tavora and Cubiertas y MZOV. The company's headquarters is in Alcobendas, Community of Madrid, Spain. The company's U.S. operations are headquartered in Chicago, Illinois, U.S.Acciona is controlled by chairman José Manuel Entrecanales and his family through Grupo Entrecanales. Wikipedia.
Acciona | Date: 2017-05-17
Comprising: blades (2) with longitudinal axis (5) and joining area (7), featuring first surface (8) non perpendicular to longitudinal axis (5), and first holes (13) parallel to longitudinal axis (5); hub (3); bearing (4) with stationary ring (9) attached to hub (3) and mobile ring (10) with rear side (11) attached to the first surface (8), and front side (12); longitudinal attaching means (14) in the first holes (13) and traversing the bearing (4), surpassing the front side (12); fixing surfaces (15, 23, 24) at the area of the front side (12); and fixing means (16) resting against the fixing surfaces (15, 23, 24) to fix the attaching means (14), providing an additional coning angle with uniform distribution of stresses at the blade (2)-bearing (4) joint and with the appropriate seat for fixing means (16).
Acciona | Date: 2017-08-30
A manufacturing process in situ of concrete towers for wind turbines which enables executing a design of concrete tower manufactured in situ by means of climbing formwork, which reduces the execution time of the concrete tower, where the invention also relates to the associated concrete tower for wind turbine.
Acciona | Date: 2017-07-05
The present invention relates to a wind turbine control method that makes it possible to detect misalignments in said wind turbine with respect to the wind direction, wherein once these situations are detected, the control method of the present invention makes it possible to perform an automatic correction of the control parameters and to return the wind turbine to its optimal operating point, together with the associated wind turbine.
Acciona | Date: 2017-06-28
The tower (15) comprises: a wall (11) having an orifice (12) for accessing the interior of the tower (15), and an outer surface defined by generatrices; and a reinforcement frame (13) joined to the tower (15) in the orifice (12) zone, and comprising least two parts (14) joined therebetween. Each part (14) has a midplane (20) that is parallel to at least one generatrix, the mid-planes (20) of at least one pair of adjacent parts (14) forming an angle other than 180 therebetween. It enables the obtention of a frame (13) more conformed to the curvature of the tower (15), combining savings in the material of said frame (13), greater optimisation of the resistance of the tower (15) and reduced stress concentration.
Acciona | Date: 2017-05-03
The present invention relates to a wind turbine assembly system which proposes an alternative to conventional cranes, having a main lifting structure configured to withstand the load of at least one tower section or at least one wind turbine component, and at least one secondary lifting structure configured to perform the lifting of the main lifting structure with respect to the wind turbine tower, in addition relating to a wind turbine assembly method according to the previous system, as well as the wind turbine assembled with the previous method.
Acciona | Date: 2017-05-10
A wind turbine is disclosed which comprises a control system configured to execute at least one ice removal routine which comprises a heating stage of at least one of the blades (3), and a mechanical removal ice stage. A wind turbine removing ice method is also disclosed which comprises a stage wherein the presence of ice is detected on at least one of the blades and, once said presence of ice is detected, comprises a stage wherein at least one ice removal routine is activated which comprises, in turn, a heating stage of at least one of the blades and a mechanical removing ice stage on at least said blade.
Acciona | Date: 2017-05-10
Wind turbine blade having at least one longitudinal hollow element that defines an aerodynamic outer surface and an inner cavity having an inner surface. The blade also comprises at least one spar (1), disposed in the inner cavity and bonded to the inner surface by at least two bonding surfaces (13) located on bonding surfaces (2) of the spar (1). The spar (1) comprises, on at least one bonding zone (2), at least three fibre fabric layers (3) and at least one central core (4) and at least one lateral core (5) disposed between the at least three fibre fabric layers (3). This makes it possible to increase the resistance to shear stresses in the adhesive bond of the spar (1) to the inner surface of the longitudinal hollow element and decrease the required amount of adhesive.
Agency: European Commission | Branch: H2020 | Program: IA | Phase: LCE-03-2015 | Award Amount: 26.52M | Year: 2016
Offshore wind business competitiveness is strongly related to substructures and offshore logistics. DEMOGRAVI3 addresses these areas through a very promising solution called GRAVI3. GRAVI3 is an innovative hybrid steel-concrete offshore sub-structure for transitional water depths between 35 and 60m. It will sustainably reduce the levelized cost of energy by up to 15% by combining the following vectors: - Using three concrete caissons, with water ballast, instead of more complex and costly steel solutions and anchoring systems - Using a smaller steel structure - Performing all construction and assembly onshore and towing the complete unit to the site where it is submerged with an innovative and robust method. - Preventing the use of heavy lift vessels and reducing the level of complexity and risk of offshore operations. GRAVI3 has undergone the typical technology development process and is presently at TRL5. The logical next steps is the demonstration at full scale in real operational conditions. Thus, the project fits perfectly to the addressed Call for Proposals as the project will support technology development and bring the technology close to market readiness. The proposed project will design, engineer, build, assemble, transport, install and demonstrate a full scale foundation, equipped with a 2 MW offshore wind turbine, in a consented and grid connected demonstration site. Additionally, the project will undertake further technology development for improved design and perform an in depth evaluation of the technologys future industrialization, competitiveness and bankability. The core partners are committed to bring the GRAVI3 technology to market intending to 1) form a company with the objective to commercialize the GRAVI3 technology; 2) prepare themselves to take on important segments of the industrial value chain which will be put in place to move the GRAVI3 product forward; 3) foster the use of the technology, namely in the wind farms they are developing.
Agency: European Commission | Branch: H2020 | Program: IA | Phase: SCC-01-2015 | Award Amount: 32.20M | Year: 2016
SmartEnCitys main Objective is to develop a highly adaptable and replicable systemic approach towards urban transformation into sustainable, smart and resource-efficient urban environments in Europe through the integrated planning and implementation of measures aimed at improving energy efficiency in main consuming sectors in cities, while increasing their supply of renewable energy, and demonstrate its benefits. The underlying concept of the proposal is the Smart Zero Carbon City concept, where city carbon footprint and energy demand are kept to a minimum through the use of demand control technologies that save energy and promote raised awareness; energy supply is entirely renewable and clean; and local energy resources are intelligently managed by aware citizens, as well as coordinated public and private stakeholders. This approach will be firstly defined in detail, laid out and implemented in the three Lighthouse demonstrators (Vitoria-Gasteiz in Spain, Tartu in Estonia and Sonderborg in Denmark). The three cities will develop a number of coordinated actions aimed at: Significant demand reduction of the existing residential building stock through cost-effective low energy retrofitting actions at district scale. Increase in RES share of energy supply, through extensive leveraging of local potentials. Enhance the use of clean energy in urban mobility, both for citizens and goods, by means of extensive deployment of green vehicles and infrastructure. An extensive use of ICTs is planned to achieve integration and consistency in demo planning and implementation, and to enable further benefits and secure involvement of citizens. These actions will be aligned to city-specific Integrated Urban Plans (IUPs), and the process will be replicated in two Follower cities: Lecce, (Italy), and Asenovgrad (Bulgaria) to ensure adaptability and maximize the project impact. Additionally, a Smart Cities Network will be setup to support project replication at European scale.
Agency: European Commission | Branch: H2020 | Program: IA | Phase: ICT-25-2016-2017 | Award Amount: 4.67M | Year: 2017
The proposal addresses novel concepts for introducing Robotics and Autonomous Systems in the Construction Sector where, at this moment, the presence is minor. Specifically, the Hephaestus project focuses on highly risked and critical construction tasks such as prefab wall installation. In that sense, the Hephaestus has been conceived as a solution for accomplishing multiple tasks on vertical or inclined planes of the built and outdoor environment. For that purpose, the Hephaestus is mainly based on a cable-driven robot and a modular end effector kit. This modular kit can host several tools and devices and therefore we can say it is multifunctional. Among the functionalities, the research project will achieve tasks such as 3D laser scanning of the building structure and the posterior installation of the prefab wall. But we can foresee some other performances such as the cleaning and maintenance of the curtain wall, repair of cracks and painting. The apparatus of the Hephaestus is lean, compatible with other handling systems, highly versatile and its reachability is very broad. Moreover, the controlling system would offer and easy and fast calibration. For achieving this goal, matrix based design methods will be used. It basically consists on decomposing a complex solution, such as the Hephaestus, into interdependent subsystems that can be feasible to solve. Certainly, the integration and adaptation of several technologies into the Hephaestus will be carried out with a systematic approach that will facilitate the election, adjustment and development of suitable tools. This proposal envisages continuous techno-economical assessment, which includes several tests in real conditions where prototypes of the cable-robot and the modular end-effector kit will be demonstrated. As an output of the research, the well balanced consortium and its interdisciplinary expertise will offer a realistic solution to cover primordial needs of the Built Environment and Construction sector.