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ESTEYCO ENERGÍA has been awarded the contract to participate in the implementation project for a wind farm in the Tehuantepec Isthmus (Oaxaca, Mexico), currently the largest in all of Latina America.

ISTMEÑO AND SAN DIONISIO WIND FARMS CONSTRUCTION PROJECT. CONTROL AND SURVEILLANCE OF SITE WORKS Mexico, 2012-2013

The operation is divided in to the Istmeño Wind Farm and San Dionisio Wind Farm and will have a capacity of 396MW once the 132 3MW VESTAS wind turbines are set up. ESTEYCO ENERGÍA’s participation includes both the detailed design construction project for the civil works and the technical assistance on site to the construction works. The civil work develops all the roads, platforms, loading and unloading docks, the geotechnical and structural design of the foundations and ground improvement in a very complex geological and geotechnical context due to the site's high seismic activity. The construction will be carried out by Recursos Eólicos de México (REOMEX, Mexican Wind Resources), which the Spanish construction company Dragados and the Cobra group are part of.

•General view of the location of Istmeño and San Dionisio wind farms

SAN DIONISIO WIND FARM

• Simulation of the San Dionisio Wind Farm. •Aerial view with the locations of the future wind farms.

ISTMEÑO WIND FARM


ESTEYCO ENERGÍA collaborates with the detailed design for the wind turbines foundations for the Talinay Wind Farm in La Serena (Chile).

TALINAY WIND FARM

This Wind Farm will have 45 wind turbines, according to the following characteristics:

WORKS MANAGEMENT La Serena, Chile, 2012

30 turbines Vestas V80-2MW, with a hub heith of 80 m • 7 turbines Vestas V90 – 3MW, with a hub heith of 80 m • 8 turbines Vestas V100 – 1,8MW, with a hub heith of 80 m •

Also, participates in the Works Management, being in charge of: • Writing the Quality Plan to develop the processes and traceability of work and materials in such works • Work monitoring. • Implementation processes approval proposed by the Contractor. • Developing a weekly summary of the work performed and work planned forecast for the next week. • Elaboration of monthly report to document the work progress.

•Detail of the foundations


ESTEYCO ENERGÍA has developed the design and is carrying the Technical Assistance for the construction of 51 wind towers for turbines with 2.3 MW in Trairí Wind Farm (CE), Brazil. The precast concrete wind towers are 80 m high, and its manufacturing and assembly is carried out by INNEO TORRES. In addition to complete the construction project of the towers, ESTEYCO ENERGÍA coordinates the obtation of the component certification and carries out the technical assistance during all phases of the project The date of finishing the complete project is expected to be in the first quarter of 2013.

• Trairí Wind farm foundation • General view of the wind farm

TRAIRÍ WIND FARM CONSTRUCTION PROJECT AND TECHNICAL ASSISTANCE IN WORKS SITE MANAGEMENT Brazil, 2012 - 2013


GAMESA requested to ESTEYCO ENERGÍA to collaborate in the detail structural design, construction level, of the wind farm foundations.

LES FORQUES WIND FARM

This wind farm has 6 positions where wind turbines type G90 T00m IIIA would be installed.

FOUNDATIONS STRUCTURAL DESIGN OF THE WIND FARM Tarragona, Spain. 2011

The work developed ENERGIA::

by

ESTEYCO

Geotechnical report and review of the use of validation Standard foundation

Design of the connection towerfoundation by bolts pretensioned

Design calculations foundation adaptation

and

• General view of Les Forques Wind Farm • Foundations detail

the


For the Wind Farm Colonia de Arias in Uruguay, ESTEYCO ENERGÍA has developed a preliminary study of the layout of the roads and mounting platforms aimed at optimizing earthmoving and drainage thereof. Colonia de Arias Wind Farm will have 35 wind turbines G97 from Gamesa to deliver a maximum power of 71 MW. The Wind Farm it is located southeast of the city of Trinidad, between the departments of Flores and San José.

•General location of the Wind Farm. •View of the Wind Farm. •Wind turbines location.

‘COLONIA DE ARIAS’ WIND FARM ROADS PRE-DESIGN, OPTIMIZATION OF EARTH MOVEMENTS, DRAINAGE AND ROADS STUDY Trinidad, Uruguay, 2012


ESTEYCO ENERGÍA was in charge of the Geotechnical and construction design of the foundations for 18 wind turbines in Paldiski Wind farm, located in Pakri Peninsula, in Estonia. In which it is planned the wind turbine assembly, with a turbine type GE 2.75 – 100 HH – 85 m with 23 MW power.

•Different views of the wind farm

PALDISKI WIND FARM

FOUNDATIONS GEOTECHNICAL AND CONSTRUCTION DETAIL DESIGN Paldiski, Estonia, 2011


ESTEYCO ENERGÍA has carried out the Construction Project and the electrical Internal design of San Vito Wind Farm, located in the Italian region of Calabria where it is planned the assembly of 25 wind turbines. The scope of the Civil Works project is given below: Hydrology and drainage systems •

Access layout

Access firm and platforms

Earth moving.

Containments

Design of the wind turbines foundations

Access to the Wind Farm

Layout and section of medium voltage.trench

•General view of the wind farm. •Access road to the wind farm.

SAN VITO WIND FARM Civil Works Construction Project and Design of the Electrical Internal Italy, 2011


ESTEYCO ENERGÍA has developed the design and carried out the technical assistance for INNEO TORRES for the construction of a wind farm of 54 precast concrete wind towers of 100 m in Agua Doce. In addition to develop the wind towers construction project, ESTEYCO has coordinated the obtention of the certification design and carried out the technical assistance during all phases of the project

• Aerial view of the mobile factory in Agua Doce Wind Farm. • Construction and wind tower assembly.

WIND FARM IN AGUADOCE CONSTRUCTION PROJECT AND TECHNICAL ASSISTANCE DURING MANUFACTURING AND ERECTION Brazil, 2010-2012


The field of wind power does not stop growing. Along with the increase in tower height, increases in power generation are also sought after, with components of great size and also features. For this reason, testing facilities for those components are more and more necessary . This is the case of wind tower blades. They are increasingly longer, have more innovative shapes or are made of more innovative materials, and are subjected to stronger wind loads. The large floor plan of the National Centre for Renewable Energy (CENER) in Sangüesa, Navarra, is already one of the most complete wind turbines test laboratories in the world. Thinking of a near future, in which blades could reach lengths of up to 100 m, incorporating a structure that would allow static and dynamic test performance on such elements in to the construction was considered important. The great stress the blades were expected to be subjected to led to the design of a large structure that would allow fixing to it both blades and tension elements belonging to them. In this way, the great forces generated in the static tests were able to be kept as internal forces of the whole blade - work surface. This made it unnecessary to transmit such forces to the foundation ground, which after all is the weak element. Foundations are about 80 m long. In the footer area the slab is 238 m wide and 1.80 m thick. After 7.50 m, the width reduces to become the beam which holds the rail for the tensioning elements and which has a variable width (ranging from 13 to 5 m) and thickness (ranging from 1.80 m to 0.90 m).

• Foundation reinceforcement. • Final view of the footers for the blade tests. • Worksurface floor plan. • Worksurface section.

WORKSURFACE FOUNDATION PROJECT FOR WIND TURBINE BLADE TESTING BUILDING CONSTRUCTION PROJECT Sangüesa, Pamplona. 2006


The use of natural gas as a source of energy is being promoted worldwide and at present a large number of processing and storage plants for natural gas are being built, including the Terminal Plant of Dahej and the Central Plant of Ras Laffan, built by the Japanese company IHI. The two tanks store liquefied natural gas at –165ºC, with a total capacity of 148,000 m3 in Dajeh and 140,000 m3 in Qatar. The concrete outer tanks have an internal diameter and minimum height of 81.80 and 37m respectively in Dajeh and 76.0 and 38.10m respectively in Qatar. They are crowned by a large concrete dome. The place where they are located is subject to high or normal seismic activity and the structures were analyzed and dimensioned taking this into account. The foundations were made with 578, 1m in diameter and 40 m deep, piles in Dajeh and 383, 9.5m deep, piles in Qatar, embedded in the slab. The most interesting aspects of these structures are: a monolithic joint of the foundation piles to the bottom slab, with a constant thickness of 1m in Dajeh (0.80 and 1.15m in Qatar); postensioning of the bottom slab using circumferential tendons (Dajeh); the fact that the 0.80m thick outer wall is embedded in the bottom slab; post-tensioning by horizontal and vertical cables of the outer wall, and a reinforced concrete dome of 0.40 minimum thickness embedded in the ring that culminates the outer wall, with two-layered concrete.

• Several views of the tanks in Dajeh during their construction. The size of this structure is shown in the dimensions of the most characteristic macro-units, which for the two tanks of Dajeh are: 40,000 m of 1000 mm piles, 30,000 m3 of structural concrete, 6,000 t of steel for reinforcement, partly of “cryogenic quality”, 10,000 t of steel for post-tensioning. • Tanks of Qatar in construction • Pictures of the calculation models

LIQUEFIED GAS TANKS IN DAJEH LNG, GUJARAT AND QATAR CONSTRUCTION PROJECTS India, 2001-2002. QATAR, 2003


The urban actions of the Forum 2004 were to include a photovoltaic plant of 4,600 m2 capable of generating 1.3 MW of electrical energy. The supporting structure, with a maximum height of almost 52 m, had to allow the orientation of the surface southwards with an inclination of 30º, in addition to providing a large area of shade on the esplanade of the Forum and the Marina. The design, developed by architects Elías Torres and José Antonio Martínez Lapeña jointly with Esteyco, consisted of a large metal pergola located at the southwest end of the esplanade above the Sailing School. Four planes of concrete with heights of between 22 and 45 m rise from the roof of the School and act as a pedestal. The combination of concrete and steel made it possible to meet the functional requisites of the plant and the architectural factors of a structure of such importance and symbolism in an outstanding space like the Forum. The great complexity of these elements, the tight deadline for carrying out the work and the importance of the topographic and technical coordination increased the importance of the construction process. The concrete “legs” were built independently from the rest of the structure, using a climbing formwork that made it possible to work at four independent sites with great speed. It was decided to raise the completed metal beams after welding them on the ground, with a combination of an 800 t crane and a 500 t for crane for each main beam. The greatest difficulty of the process consisted in aligning a 112 m long beam weighing 260 t with 25 bolts embedded in the concrete, with tolerances of 20 mm and with the inclinations and geometric complexity of this structure. When the metal structure had been completed, the concrete and the steel were “stitched” using prestressed bars from the inside of the boxes.

• Images of the pergola under construction. • General view of the finished structure.

PHOTOVOLTAIC PERGOLA IN THE FORUM 2004 CONSTRUCTION PROJECT AND TECHNICAL ASSISTANCE TO THE CONSTRUCTION MANAGEMENT Barcelona, 2002-2003


“La Africana” Solar Thermal Power Station functions transforming solar energy into electricity by means of a solar land field of approximately 550,000m2 of cylindrical and parabolic shaped collectors, a 7 hours capacity thermic energy storing system of molten salt, and a steam cycle of 49.9 MW of nominal power. This is a state-of-the-art station of parabolic cylinder, where a set of mirrors with parabolic shape concentrates the thermal energy on a single axis. The axis heats a fluid which, afterwards, vaporizes water that moves a turbine generating electricity. The Station, located in Colonia de Fuente Palmera municipality, consists of the following systems: the solar field of paraboliccylindrical collectors, the thermal storage system through salts, the HTF (High Thermical Fluid) system, the electric generator plant and the BOP (Balance of Plant) that works associated with a group of auxiliary installations that keeps the equipment in working order. The Station includes as well the irreplaceable water collecting and storing systems, and a set of industrial constructions where the equipment of the different parts is stored.

•Parabolic-cylindrical collectors view and aerial photograph of the station.

«LA AFRICANA» SOLAR THERMAL POWER STATION CIVIL ENGINEERING WORK MONITORING Córdoba, 2011


ENERGY