GRI Towers has been following its main clients to key strategic markets, with state of the art facilities, to provide them with a global & efficient supply, sharing our domestic view in addition to our experience in the export business.

Nowadays, GRI Towers thorought its plants with presence worldwide: Spain, Brazil, United States, Turkey, India, South Africa and Argentina, generate a production of over 1,000 towers per year.

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GRI Towers was born with the acquisition of Ganomagoga in 2008, and it has become an important player in the supply of renewable wind energy components. In 2015, GRI Towers becomes a global leader, being the reference company of the wind turbine manufacturers in the world.

GRI Towers gives to our customers, services worldwide; sharing our domestic view in addition to our experience in the export business, thanks to our proven track record within the field of renewable energies in the wind industrial sector.

GRI Towers manages eight tower manufacturing plants which integrate the industrial processes of wind towers in the key strategic wind markets around the world. In addition, to manufacturing the wind towers itself, it also equips each wind tower according to the individual specifications outlined by each customer, to provide them a global and efficient supply.

The scope includes:

  • Steel treatments: Cutting and Beveling.
  • Circular welding process.
  • Electrical components: wiring, trays, fuses, etc.
  • Internals: platforms, ladders, elevators, doors, etc.
  • Surface treatments: metallizing, blasting, painting, etc.
  • Tower manufacture: bending and welding.

procesos torres_ing

GRI Hybrid Towers develops innovative tower designs based on the combination of concrete and steel.

Since the beginning, GRI Hybrid Towers has committed to the R&D&i with the aim of providing to the market with innovative products that cope with the current and future demands.

Our main concept design statement:

”To keep simplicity and flexibility all along the life cycle process of our solutions: product development, manufacturing and installation”

Thus, from our conceptual design, we can “customize” our tower to any turbine, OEM and/or country.

To that end, for each new project, our Design Engineering team carries out a detailed analysis of the hybrid tower:

  • The proportion of steel/concrete is defined in order to assure the best results in both, competitiveness and cost.
  • According to the local supply chain, we customize the tower to ensure a perfect integration between our design and the WTG customer requirements , considering:
    • Steel sections manufacturing
    • Steel section transportation (from the manufacturing plant to the site)
    • Manufacturing of the concrete section with all the required elements (such as mold and other tools and means).
    • According to the kind of cranes available, the installation of the concrete segment (dovel) the steel sections, and other turbine components.
    • Design and manufacturing of internal components.

The Hybrid Tower is customizable to any length considered for the different turbines models of the OEMs.

MARKETS

The hybrid towers market responds to the growing demand of tower solutions that address the need of conquering new territories and tower heights, as well as the requirements of more strict local content regulations.

Local Content Markets

GRI Hybrid Tower will always manufacture and install concrete shaft locally, contributing to fulfill the local content rules. 100 % local content can be reached in countries where GRI Towers operates its steel tower manufacturing plants.

Taller Towers Markets

Ideal solution for multi-megawatt turbines with taller hub heights. Our hybrid tower designs offer competitive solutions with linear costs

  • Design GHT-1 reaches *heights of 120-130 meters for turbines of 2 MW.
  • Design GHT-2 reaches* heights of even 150-160 meters for turbines of more than 2 MW.

New Markets

In new emerging wind power markets, our hybrid tower solution provides a quick response when there is no steel tower manufacturing factory in the country/region. GRI Towers operates several steel tower manufacturing plants under a worldwide exportation coverage radius.o G

The designing part of GRI Renewable Industries aims to find the best solutions for the suppling the tower according to the demand and market needs, reduce energy costs and improve the annual energy production rate.

Supporting the Hybrid towers department, analyzing the different concrete designs, calculating and producing the most optimized tower in collaboration with OEMs in local targeted markets defined by the customer and the customizing of the towers accodring to type of wind, location, hub height…

In conclusion, R&D&i is developing the strategy of vertical integration across the value chain of the product, establishing the life cycle costs of the tower with the most optimal designs according to the specifications demanded.

 

The Spanish Ministry of Economy, Industry and Competitiveness, in the framework of the program “Retos-Colaboración 2016” of the National Plan of Scientific and Technical Research and Innovation 2013-2016, financed by FEDER funds from the European Union, has agreed to provide a three-year grant to the consortium formed by GRI Renewable Industries, S.L. (leader), Gestamp Wind Steel Galicia, S.L. and the research institution Aimen for the development of the project PROTOS.

 I+D+i

The aim of PROTOS is to develop new and highly productive welding strategies for the wind tower manufacturing process that will enable us to decrease the total manufacturing process cost, bringing a significant upturn on the competitiveness of all companies involved.

Flangeroute

The main activity of the project will focus on the development of new welding strategies oriented to catch up with the productivity ratios needed to compete at a global scale, regarding the size and weight of current wind tower trends. Offshore wind towers will benefit from this due to the importance of the welding activity in their manufacturing process.

Ministerio Economía y Competitividad+UE

The Center for Industrial Technological Development (CDTI) has granted financing to GRI Renewable Industries, S.L for the development of the “ROCKET” R & D project. The “ROCKET” project is focused on the development of new disruptive structural design solutions based on a new concept of systems that are joined to a central body that allow to obtain a reduction of the dimensions of the structure while maintaining the height of the tower, resulting in the achievement of significant advantages. This structural solution allows a significant reduction in the use of raw materials, manufacturing costs, logistics and assembly, having the capacity to design towers ranging from 140 to 200 meter of bushing, in accordance with the last generation of wind turbines. It also allows the execution “on site” in a modular manner. All this translates into greater productive flexibility, a reduction in the execution times in the work and, therefore, a reduction in the execution costs of the entire structure.

New typology of posttensed nerved foundation suitable for all kind of Wind Towers (Steel, Hybrid, concrete, etc.)

Our design is the result of extensive research and conceptual evolution, under the identification of the main design parameters and disadvantages of conventional foundations, aiming for an optimal response to them.

Thus, our foundation combines all the advantages thanks to its high technological variable:

  • Lower consumption of these materials due to its high degree of optimization.
  • Lower volume of excavation.
  • Possibility of partial prefabrication.
  • Specially, the absence of cracks under service loads thanks to the post-tensioning tendons. This is an issue of great relevance in the design of foundations for wind turbines.

Therefore, this product comes to market as the best option to optimize the foundations of all types of towers, whether metal, concrete or hybrid.

cimentacion GHT

The design of the ribs or beams of the foundation with a T cross section responds to a double approach:

  1. The excavation is reduced because the flange of the T beam is situated on top of the foundation.
  2. It is structurally more efficient because the principal bending mode transmit tensile stresses to the bottom area of the web and compressive stresses to the top flange.
    These compressive stresses are easily absorbed by the large width flanges. This allows a greater lever arm, which gives to the cross section a greater ductility

Patent

The GHT foundation has been patented and rated as completely novel by the Spanish Patent and Trademark Office. To date, we are not aware that any similar foundation exists on the market. PCT international published 12.12.2013.

Country registration:

  • Europe, Brazil, Mexico, Chile, USA, Canada, South Africa, China, India, Morocco, Australia
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cimentacion 2
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Zones of influence