Spain advances in offshore power grids with the CONECCMAR project, led by Sener

Energy

Spain advances in offshore power grids with the CONECCMAR project, led by Sener

Share it:

05/03/2026

Sener will lead the R&D project CONexión Eléctrica en Corriente Continua MARina (CONECCMAR, Marine High-Voltage Direct Current Electrical Connection), in consortium with leading technology partners Seaplace, Instituto de Investigación Tecnológica (Universidad Pontificia Comillas), CoreMarine, Deep Insight Blue and Ravenwits. The project will be supported by an advisory group composed of Acciona Energía, Naturgy and Navantia Seanergies. It has also received the support of Redeia through a letter of endorsement.

Co-financed by the Community of Madrid and the European Regional Development Fund, the project is part of grants aimed at promoting public–private cooperation in R&D&I through consortium-based flagship projects.

Sener leads a consortium made up of the engineering and technology group and specialised entities Seaplace, Instituto de Investigación Tecnológica (Universidad Pontificia Comillas), CoreMarine, Deep Insight Blue and Ravenwits to implement the R&D project CONECCMAR. This program, aimed at developing the next generation of high-voltage direct current (HVDC) offshore electrical infrastructure, is a key element for the deployment of offshore wind energy in Europe. The project will receive strategic support from an advisory group composed of Acciona Energía, Naturgy and Navantia Seanergies, who will provide their expertise to align the program’s developments with current and future challenges in the electricity system and energy sector. Likewise, Redeia has demonstrated its interest in the project through a letter of endorsement.

The goal of CONECCMAR is to generate new scientific and technological knowledge in the field of marine high-voltage direct current electrical infrastructure, through applied research in three main areas: HVDC floating substations based on advanced concepts; compliant fixed structures for deep-water applications; and hybrid multi-terminal HVDC offshore interconnection nodes. Over the next two years, the consortium will focus on these three research areas to lay the technical and functional groundwork for the next generation of technologies designed to perform in challenging offshore environments.

Schematic representation of a hybrid offshore energy link integrating fixed‑bottom and floating wind farms with both HVAC and HVDC transmission systems, connecting multiple offshore substations to onshore grids at two independent landing points.

The initiative aligns with Europe’s goals for decarbonisation and climate neutrality, which require advanced offshore infrastructure capable of integrating new deep-water wind farms and enabling hybrid multi-terminal systems that combine renewable power evacuation and transnational electrical interconnection at a single node.

The project is co-financed by the Community of Madrid (CTVI) and the European Regional Development Fund (ERDF) through a grant program that promotes public–private cooperation in R&D&I via consortium-based flagship projects (no. 59/317816.9/25).

This alliance represents a significant step forward in developing the offshore electrical grids that Europe will need in the coming years and strengthens Spain’s role as one of the leading countries driving the technologies that will power the energy transition.

Cofinanciado por la UE

Share it:

Sener contributes to the design of the first portable, containerised electrolyser developed in the Basque Country

Energy

Sener contributes to the design of the first portable, containerised electrolyser developed in the Basque Country

Sener/Energy

Share it:

03/02/2026

The H2SKID project has officially begun, aiming to develop a 1.25 MW experimental portable electrolyser with AEM/PEM technology. It is conceived as an enabling solution to supply green hydrogen to industrial end users.

With Sener’s participation and led by SARRALLE as coordinating entity, the project brings together eleven leading companies from across the hydrogen value chain. It is a unique initiative in the Basque Country, designed to drive industrial decarbonisation. In Sener’s case, and thanks to its previous R&D experience, the company will focus on designing the electrolyser’s main components. Sener has previously worked on next‑generation electrolysis technology development.

In the Basque Country, renewable hydrogen has become one of the strategic levers for advancing the decarbonisation of industry. Among the most promising pathways is the gradual substitution of natural gas with green hydrogen in high‑temperature processes, such as those in steelmaking, foundries, the paper industry, glass, cement and petrochemicals. However, for this transition to be viable, it is essential to ensure sufficient hydrogen supply to enable demonstrative tests under real operating conditions. At present, the lack of pipeline infrastructure connecting industrial facilities with centralised green hydrogen production plants limits such trials.

The H2SKID project has been created to address this need. Its objective is to design and build a portable, containerised electrolyser that will serve as an enabling solution for supplying green hydrogen to industrial end users. This infrastructure will allow long‑duration testing campaigns, which are essential to validate the performance of hydrogen‑fuelled industrial equipment. The project also includes advanced research into key electrolyser technologies and auxiliary systems, to strengthen a robust and competitive hydrogen production value chain.

The H2SKID electrolyser is conceived as a compact, modular and plug‑and‑play experimental platform, integrated into two containerised modules: one dedicated to hydrogen production via electrolysis, and the other to compression and storage. The solution will be compatible with both AEM and PEM electrolysis technologies, offering high technological flexibility. In addition, the system will function as a test bench for the validation of critical components of both the electrolyser and the compressor.

The H2SKID solution will be validated in a real industrial environment, specifically in the ladle pre‑heating burner area and/or the tunnel furnace at ArcelorMittal Sestao, ensuring the practical relevance of the results obtained.

By the end of the project, H2SKID will have been consolidated as a flagship scientific‑technological tool to support the development of the hydrogen sector in the Basque Country and to accelerate industrial decarbonisation. H2SKID is a multi‑year (2025–2027) strategic industrial research collaboration involving the following entities: Sarralle (coordinator), ABC Compresores, ArcelorMittal Sestao, Erreka, Flubetech, Mugape, Sener, Team Group Engineering, Torraval, Tubos Reunidos Group and Zigor. It is also supported by ABC Tech, Tecnalia and Zigor’s R&D unit as members of the Basque Network of Science, Technology and Innovation (RVCTI), and by the BASQUE ENERGY Cluster for communication and dissemination activities.

H2SKID is funded by the Basque Government’s Department of Industry, Energy Transition and Sustainability (HAZITEK 2025 Programme) and by the European Regional Development Fund (ERDF 2021–2027).

Share it:

Green ammonia plant for Fortescue in Brazil

Case of success

Green ammonia plant for Fortescue in Brazil

Fortescue Future Industries (FFI), one of the world’s leading green energy players and a top-ten company on the ASX, continues to advance its commitment to producing green hydrogen and green ammonia from 100% renewable sources.

In line with this strategy, the company is developing a large-scale green ammonia plant in the industrial area of Porto do Pecém (Brazil), located within an Export Processing Zone (EPZ) in the municipalities of São Gonçalo do Amarante and Caucaia.

Sener is supporting the project as a key technology partner, delivering the Front-End Engineering Design (FEED) for all Outside Battery Limits (OSBL) infrastructure required for the seamless operation and integration of the hydrogen plant (1,200 MW) and the ammonia plant (with a nominal capacity of 2,700 metric tonnes per day – MTPD).

Sener’s scope

in the FEED of the OSBL infrastructure for the green hydrogen and ammonia plant

Sener will undertake the Front-End Engineering Design (FEED) for all OSBL infrastructure associated with FFI’s green hydrogen and ammonia facilities, covering the definition and integration of utilities and interface systems, as well as the design of a service corridor of over 10 kilometres for ammonia and water pipelines.

The scope also includes the engineering of the desalination plant, the seawater intake and outfall systems, the construction of ammonia storage in two 60,000 m³ tanks, and the adaptation of existing port infrastructure—both maritime and onshore. Sener will likewise prepare the capital expenditure (CAPEX) estimate for all OSBL facilities, with an accuracy of ±10%.

Key project figures

Initial electrolysis capacity of 1,200 MW.

Initial ammonia production of 2,700 MTPD.

Expansion up to 2,400 MW of total electrolysis capacity.

Future ammonia production capacity reaching 5,400 MTPD.

Main project systems

Electrolysis plant (1.2 GW + 1.2 GW).

Ammonia synthesis plant (2,700 + 2,700 MTPD).

Water desalination plant.

Seawater intake and outfall systems.

Nitrogen production system.

Cooling system.

Ammonia pipeline.

Ammonia storage tanks.

Boil-off gas (BOG) system.

Ship loading arms.

Drain vessel.

Flare system.

Auxiliary systems.

German LNG, the first onshore regasification terminal to be built in Germany

German LNG will be located in Brunsbüttel and will be able to produce up to 8 BCMA

Case of success

Sener/Energy

German LNG, the first onshore regasification terminal to be built in Germany

Share it:

German LNG, the first onshore regasification terminal to be built in Germany

Contacto

German LNG will be the first onshore regasification terminal in Germany, and it will allow the country to inject gas to the national network from the sea.

It is a strategic project for the energy transition process which will make a significant contribution to the energy supply of Germany and Europe.

This Liquefied Natural Gas (LNG) regasification terminal, which will be located in the German town of Brunsbüttel, in the North of the country, wil have the capacity to produce up to 8 BCMA (Billion Cubic Metres per Annum) of natural gas per year, which can be expanded to at least 10 BCMA. This represents approximately 10% of Germany’s current annual consumption.

Benefits

It will contribute to the security of energy supply in Germany and Europe

It will allow Germany to inject gas to the national network from the sea, offering an alternative to the gas imported by land.

Contributes to the Germany energy transition process.

Characteristics

Equipment

Two 165,000-m³ storage tanks.
Two jetties, unloading arms and pipelines.
Storage tanks.
Systems for regasification and gas emission.
A BOG (Boil-off Gas) recovery system.
A flare stack.
Auxiliary systems.
Series of buildings specially designed for the operations.

Services

Loading and unloading of carriers.
Storge of LNG.
Regasification.
Injection into the German natural gas grid.
Distribution of LNG via tankers and railway tanker wagons.

In figures

Storage

Two 165,000-m³ storage tanks

Production

Up to 8 BCMA (Billion Cubic Metres per Annum) of natural gas per year, which can be expanded to at least 10 BCMA.

The Joint Venture

Cobra (62%) and Sener (38%)

El consorcio formado por las empresas Cobra, una empresa del grupo VINCI, y SENER, llevarán a cabo los trabajos de ingeniería, compra y construcción (EPC), con una participación del 62 % y 38 % respectivamente.

The consortium comprising the companies Cobra, a company of the VINCI group, and Sener will carry out the EPC (Engineering, Procurement and Construction) contract, with a 62% and 38% share, respectively, for the client German LNG Terminal GmbH.

Two hydrogen-ready combined cycle power plants: Heilbronn and Altbach/Deizisau

GE Vernova’s first Class H power plants

Case of success

Two hydrogen-ready combined cycle power plants: Heilbronn and Altbach/Deizisau

Share it:

Two hydrogen-ready combined cycle power plants: Heilbronn and Altbach/Deizisau

Contact

We are part of an international consortium (Sener, General Electric and Bonatti) for the construction, maintenance and servicing work of two hydrogen-ready combined cycle power plants in Heilbronn and Altbach/Deizisau, Germany. This is a major energy transition project that will existing coal power plant sites into natural gas and, from the 2030s, green hydrogen plants.

The plants will be built on land adjacent to these coal plants and will share with them certain services such as the cooling tower, the workshop and warehouse or the control room.

, with an initial capacity to burn 20 % hydrogen (H2) and they will be technologically prepared for an expansion of up to 100 %.

The plants are both located on the banks of a navigable river, along which heavy equipment is transported to the plants.

Together with Bonatti, Sener is responsible for the complete detailed engineering, the supply of the BoP (balance of plant) and the complete construction of the power plant buildings and its chimney with its foundation.

1,300 megawatts of electricity generation capacity

is set to be produced at the two power plant sites.

Capacity to power 2.4 million German homes

(considered operation as intermediate-load power station and average 3-person-households)

Supply of steam for district heating for the citizens, commerce and industry

of Heilbronn and the larger Stuttgart area.

Prepared for 100 % operation with H2.

An initial capacity to burn 20 % hydrogen (H2).

A boost for the energy transition in Europe

The project is aligned to the European and national regulations in the decarbonization path towards 2050 to promote district heating in achieving the goals of efficiency, energy sustainability, use of renewables, and reduction of fossil fuel use.

Altbach/Deizisau power plant

A combined cycle gas turbine power plant (CCGT) with an electrical output of about 680 MW and a thermal output of up to 180 MW for heat extraction is planned for construction at the Altbach/Deizisau site.

After commissioning of the combined cycle power plant, scheduled for 2026, the coal-fired boilers, the associated flue gas cleaning system and the coal-fired auxiliary steam generators will be decommissioned.

Heilbronn power plant

With a maximum electrical output of 710 MW and around 190 MW of district heating capacity, the Heilbronn combined cycle gas turbine plant is being built to replace the currently coal-fired one and reduce carbon emissions by more than 50%.

To secure the supply of district heating, a heat storage facility with a capacity of 600 megawatt-hours and a hot water boiler system with a district heating capacity of approximately 170 MW are simultaneously being built.

During the conversion, part of the district heating grid will also be modernized in an energy-efficient manner by switching from a steam to a hot water network. The district heating grids supply around 300 industrial and commercial customers in Heilbronn and Neckarsulm, alongside around 150 residential buildings. The plant is expected to start operation by the end of 2026.

This way, the Heilbronn power plant will replace existing coal-fired plants with more efficient natural gas fired plants while enabling future fuel mix combustion of up to 20% by volume of hydrogen.

Pumped-storage facility in Salto de Chira, on the island of Gran Canaria

Stored energy from renewable sources

Case of success

Sener/Energy

Pumped-storage facility in Salto de Chira, on the island of Gran Canaria

Share it:

Pumped-storage facility in Salto de Chira, on the island of Gran Canaria

Stored energy from renewable sources

Contacto

Pumped storage facility in Salto de Chira

Sener is developing the construction engineering of the pumped-storage facility in Salto de Chira, on the island of Gran Canaria, designed and financed by Red Eléctrica.

This 200 MW hydroelectric storage facility (equivalent to 36% of the island’s peak demand) will connect the existing reservoirs of Chira and Soria, in the south of the island.

The facility will act as a large natural battery, providing a storage capacity of 3.5 GWh, enough to power the island for almost 7 hours.

Benefits

3.5 GWh storage capacity.

Enough to power the island for almost 7 hours.

Energy from renewable sources.

Stores surplus energy from wind and solar.

Maximises the island’s energy independence.

An innovative design conceived by Red Eléctrica.

Reduces fossil fuel imports.

HOW DOES IT WORK

Stores surplus energy

The pumped storage facility in Salto de Chira will be used to store surplus energy from renewable sources, such as wind and solar.

Reinforces the electricity supply

This facility will serve to reinforce the electricity supply on the island and promote the integration of renewables into the island’s electric grid.

CHARACTERISTICS

Hydroelectric storage facility

200 MW (equivalent to 36% of the island’s peak demand)

A large natural battery

It will connect the existing reservoirs of Chira and Soria

Reinforces the electricity supply to the island

It allows the island to be supplied with energy for hours at a time.

Sustainable project

It uses the surplus energy from renewable sources.

Construction design by Sener

For this project, Sener is doing the construction design work of the different elements that make up the pumped storage facility:

The access roads to the different areas of the project.
The underground access tunnels.
The intakes at the Chira and Soria reservoirs.
The buildings of the different platforms.
The hydromechanical and electromechanical equipment and installations.
The control system.

MEET OUR EXPERT

José Manuel Clamagirand

Water and Environment Director

“Sener is strongly committed to the energy transition towards a more sustainable model based on technology and innovation”.

“Our contribution to this project is an example of our experience in the field of renewable power integration and the optimisation of transport networks using various storage technologies. We are pleased to contribute to the development of this innovative design by Red Eléctrica for the Salto de Chira facility, which incorporates the latest technological advances and cutting-edge engineering to maximise its flexibility and performance”.

Gate Terminal, one of the largest LNG terminals in Europe

Case of success

Gate Terminal, one of the largest LNG terminals in Europe

Gate Terminal: one of the largest LNG terminals in Europe

At Sener we have participated in the construction of one of the main liquefied natural gas infrastructures in Europe by providing engineering, purchase management, construction, maintenance and improvements services to the plant

We are actively participating in the development, maintenance and improvement of the Gate Terminal regasification plant in Rotterdam, spanning its construction to its capacity expansion.

Gate Terminal is currently the continent’s LNG hub, as it contributes to the natural gas supply in the Netherlands and Northwest Europe. The terminal receives LNG for its customers, stores it, regasifies it and then supplies it to the gas transport network for distribution to households and industry.

Terminal characteristics

One of the largest liquefied natural gas (LNG) terminals in Europe

Gate Terminal is currently able to meet the needs for natural gas of the entire population of the Netherlands and part of Europe.

Expansion of regasification capacity up to 16 BCMa

In a first expansion phase, the capacity to supply natural gas was increased from 12 to 13.5 BCMa. An additional expansion of 2.5 BCMa is currently being carried out.

The terminal has three tanks with a capacity of 180,000 m3 each

and the expansion project with a fourth 180,000-m3 tank is underway.

Three quays

for simultaneous unloading of Q-Max boats (the largest LNG vessels in the world).

Three lorry loading areas and an area in which LNG is converted into natural gas.

Reference engineering in the construction, commissioning and expansion of Gate Terminal.

Sener Services provided to Gate Terminal

Gate Terminal B.V. entrusted Sener on four occasions with the design, construction and expansion of this terminal.

Main contractor for engineering, procurement and construction of the terminal (2007-2011)

We are participating as the main contractor, under the EPC modality, in the engineering, procurement and construction of the terminal in consortium with Techint, Entrepose and Vinci.

The scope of the contract included the execution of the terminal with three storage tanks with a capacity of 180,000 m3 each and an initial export of 12 BCMa (Billion Cubic Metres per Annum), as well as two docks capable of simultaneously unloading LNG vessels of up to 267,000 m3. Within the construction consortium, Sener participates in the project’s management, procurement and construction, and we were responsible for the execution management and the commissioning management, as well as for carrying out the engineering activities.

Maintenance and improvements in the terminal (2020 – 2022)

Following Gate Terminal’s turnkey delivery in 2011, we were once again contracted to provide the engineering, procurement and construction services (EPCM) required to maintain and improve the regasification plant.

Expansion of Gate Terminal

In 2022, Gate Terminal B.V. initiated the terminal’s extension project, which consists of two phases: increasing the plant’s natural gas send-out capacity with an additional 1.5 BCMa in a first phase (Extra Send-Out project); and an additional capacity of 2.5 BCMa and a 4th LNG tank in a second phase, reaching a total send-out capacity of 16 BCMa.

First phase: Extra Send-Out (ESO) Project (2022 – 2024)

We have carried out the engineering services and the procurement and construction management (EPCM) services of the send-out capacity expansion works with an additional 1.5 BCMa, bringing the total nameplate capacity from 12 BCMA to 13.5 BCMA.

The works consisted of the installation of a vaporiser and a high-pressure liquefied natural gas (LNG) pump together with all its associated facilities, such as equipment foundations, interconnection of piping and racks, power supply and process control. In addition, a new seawater pump was also supplied.

Sener has developed the required detailed engineering, together with the procurement management of all supplies, on behalf of Gate Terminal, and we have been in charge of the construction supervision.

Thanks to this project, Gate Terminal increases the capacity to supply gas from the sea to Northwest Europe and, therefore, advance on the path to the European continent’s energy independence.

Second phase: Expansion project for the fourth storage tank (2024 – 2026)

In collaboration with VINCI Construction Grands Projets – Entrepose Contracting and Sacyr Proyecta, we have been selected by Gate Terminal to execute a new expansion of the terminal in order to increase the capacity to supply natural gas from the plant and to connect the fourth LNG tank to the existing plant, together with a new BOG system.

In this new project, Sener is carrying out engineering services, as well as the project management, including procurement and construction management services. The works consisted of the installation of two vaporisers (ORV), a high-pressure liquefied natural gas (LNG) pump and a BOG compressor together with all its associated facilities, such as equipment foundations, interconnection of piping and racks, power supply and process control. Two new seawater pumps will also be installed.

Services

Execution management and commissioning management

Engineering services

Procurement and construction management (EPCM)

Design optimisation for a more efficient operation and maintenance

Guarantee of the plant’s uninterrupted operation over the next decade

Construction supervision

Improvement of work processes

Time optimisation

Awards

2011. Project of the Year Award from the European Construction Institute.

2011. Liquefied Natural Gas Project of the Year.

2012. Finalist in Project Excellence Awards.

Contact us

2.5 MW electrolyzer for Petronor’s refinery in Muskiz (Spain)

Decarbonization of strategic sectors

Case of success

Sener/Energy

2.5 MW electrolyzer for Petronor’s refinery in Muskiz (Spain)

Share it:

2.5 MW electrolyzer for Petronor’s refinery in Muskiz (Spain)

Contact

We have completed the EPC (engineering, procurement, and construction) contract for a 2.5 MW electrolysis plant for Repsol. The electrolyser, located within the Petronor industrial complex in Muskiz (Spain) and aimed at supplying the Basque Hydrogen Corridor, enabled the production of the Basque Country’s first renewable hydrogen at the end of 2023.

In this way, the electrolyser serves the refinery itself and various entities within the Left Bank Technology Park, located in the municipality of Abanto Zierbena.

The green energy used by the electrolyser to generate renewable hydrogen is provided by Repsol, while the pipelines carrying the renewable hydrogen from the refinery to the Technology Park were built by Nortegas.

Additionally, this renewable hydrogen will also be supplied to the initial buses and light vehicles of the logistics mobility platform at the Technology Park, which will include the Basque Country’s first hydrogen refuelling station.

This project is part of the Basque Hydrogen Corridor, BH2C, and contributes to the shift in the energy and economic model, advancing the decarbonisation of strategic sectors such as energy, mobility, industry, and services.

Characteristics

2,5 MWe Alkaline Electrolyser

Generation of 340 tonnes/year of H2 at 30 barg

H2 quality for mobility

Contact us

Dams & Hydropower

Engineering water-based solutions for clean, dispatchable energy

Large-scale generation, grid flexibility, and long-term energy storage through robust, efficient and environmentally integrated infrastructure

Dams and hydropower continue to play a key role in global decarbonization and energy security. As one of the most mature and reliable renewable energy sources, hydropower enables large-scale generation, grid flexibility, and long-term energy storage. At Sener, we offer comprehensive engineering and project management services for hydroelectric plants, dams and pumped storage systems, helping our clients unlock the full potential of water resources through robust, efficient and environmentally integrated infrastructure.

More than 2 GW in hydroelectric capacity engineered globally

We have participated in the design and modernization of large dams and hydropower systems across Europe and Latin America. Our services range from civil works to turbine integration, hydraulic modeling and digital asset management.

Our strategic vision is to position Sener among the world’s leaders in integrated water engineering, evolving towards a “Water Intelligence Ecosystem” that leverages smart infrastructures, digital twins, and AI for advanced hydropower management.

We deliver resilient hydropower solutions adapted to terrain, hydrology and sustainability goals

Our projects are designed to maximize energy output while minimizing environmental impact, integrating sediment control, fish migration and water resource management in every phase.

Why choose us

We combine hydrological, hydraulic, geotechnical, structural, electrical and control engineering to deliver tailor-made solutions for both new and existing assets. Our expertise covers gravity and arch dams, penstocks, spillways and all associated electromechanical systems. We also provide advisory and technical assistance for retrofitting and repowering plants to meet modern efficiency and environmental standards. In parallel, we apply advanced modeling and predictive maintenance strategies to optimize performance and extend asset lifespan.

How we work

We address hydropower infrastructure as complex, multidisciplinary systems. Our teams manage everything from preliminary studies and environmental permitting to detail design, construction supervision and O&M planning. We work in close coordination with local authorities, utility companies and financial institutions, ensuring alignment with technical, regulatory and funding requirements.

We create and manage hydropower projects from concept to commissioning

Whether for run-of-river plants, reservoirs or pumped storage systems, our work ensures safe operation, efficient energy generation and long-term resilience to hydrological variability.

Our integrated solutions for dams and hydropower

We deliver comprehensive expertise in dams and hydropower, covering civil and hydraulic engineering, hydropower systems, and advanced modelling. Services include pumped storage, asset modernization, and environmental integration. With strong capabilities in monitoring tools, permitting, and project management, we ensure efficient, sustainable, and reliable energy infrastructure across the entire hydropower lifecycle.

Pumped-storage facility in Salto de Chira, on the island of Gran Canaria

Saber más

Virtual Models of the Guadiana Hydrographic Confederation Dams

Saber más

Our integrated solutions for dams and hydropower

BIM

Integrating Building Information Modeling to streamline design, construction, and asset management.

Seismic design

Engineering structures to withstand seismic forces and ensure occupant safety.

Planning policy advice

Advising on planning policies to support sustainable development and compliance.

Energy efficiency

Improving energy performance through smart design and operational strategies.

Construction management

Managing construction projects to ensure timely delivery, quality, and cost control.

Comissioning

Ensuring systems are tested and validated for optimal performance before operational launch.

Civil engineering

Delivering structural and infrastructure solutions for resilient and efficient environments.

Area Energy Planning

Developing regional energy strategies to optimize sustainability, cost, and resource use.

At Sener, we turn hydropower into a modern tool for sustainability — combining water resource intelligence with engineering precision and renewable ambition.

Cogeneration

Hybrid plants for a sustainable energy system

Integrating heat and power for industrial efficiency and sustainability

Sener develops cogeneration and combined cycle plants that are both efficient and highly flexible. These facilities produce electricity and useful heat simultaneously, reducing fuel consumption and lowering emissions. By integrating cogeneration into industrial processes, Sener enables clients to decarbonize while maintaining operational reliability.

We integrate energy and process with proven reliability

Our cogeneration solutions are engineered to fit seamlessly within existing industrial processes. By coupling heat and power generation, we achieve efficiencies far above conventional plants. Projects delivered in Spain and across Europe demonstrate our ability to ensure resilience while reducing operating costs and emissions. This makes Sener a trusted partner for industries that depend on both energy security and sustainability.

Why choose us

Sener has decades of experience in generation projects and the industrial world. We have implemented advanced cogeneration plants that supply process steam and power to refineries and petrochemical complexes, often under demanding operational conditions. Our designs integrate multiple liquid and gaseous fuels and can adapt to continuous and discontinuous production, guaranteeing security of supply.

How we work

Our methodology begins with a comprehensive assessment of industrial energy demand, including process steam, heat, and electricity needs. We then model scenarios to determine the optimal configuration, whether single-shaft or multi-shaft, liquid, gaseous, or dual fuel. During implementation, we deliver turnkey EPC contracts that include design, procurement, construction, and start-up. Post-commissioning, we provide O&M services, monitoring efficiency and supporting fuel transitions such as the gradual adoption of hydrogen.

We ensure performance through flexible, future-ready design

Our cogeneration plants are designed for maximum flexibility. They can accommodate multiple fuels, incorporate CHP, and adapt to varying production regimes. By embedding predictive monitoring and planning for hydrogen readiness, we secure long-term performance and compliance with tightening environmental standards. This ensures that plants remain competitive, efficient, and aligned with decarbonization goals.

Delivering cogeneration projects across energy markets

Sener has executed cogeneration projects in Spain, Germany, and other European markets, working alongside industrial leaders.

Scholven 1 Natural Gas Cogeneration Plant (Germany)

Saber más

Comprehensive cogeneration services for industry and utilities

Our services span feasibility studies, detailed engineering, EPC delivery, commissioning, and lifecycle support.

Seismic design

Engineering structures to withstand seismic forces and ensure occupant safety.

Planning policy advice

Advising on planning policies to support sustainable development and compliance.

Energy efficiency

Improving energy performance through smart design and operational strategies.

Area Energy Planning

Developing regional energy strategies to optimize sustainability, cost, and resource use.

At Sener, we design cogeneration plants that integrate heat and power, cut fuel use and emissions, and deliver reliable, future-ready energy for industry and utilities.

Spain advances in offshore power grids with the CONECCMAR project, led by Sener

Share it:

Share it:

Sener contributes to the design of the first portable, containerised electrolyser developed in the Basque Country

Share it:

Share it:

Energy

Sustainable Fuels

Green Hydrogen & Carriers

Green ammonia plant for Fortescue in Brazil

Green ammonia plant for Fortescue in Brazil

Sener’s scope

in the FEED of the OSBL infrastructure for the green hydrogen and ammonia plant

Key project figures

Initial electrolysis capacity of 1,200 MW.

Initial ammonia production of 2,700 MTPD.

Expansion up to 2,400 MW of total electrolysis capacity.

Future ammonia production capacity reaching 5,400 MTPD.

Main project systems

Electrolysis plant (1.2 GW + 1.2 GW).

Ammonia synthesis plant (2,700 + 2,700 MTPD).

Water desalination plant.

Seawater intake and outfall systems.

Nitrogen production system.

Cooling system.

Ammonia pipeline.

Ammonia storage tanks.

Boil-off gas (BOG) system.

Ship loading arms.

Drain vessel.

Flare system.

Auxiliary systems.

Energy

Gas Solutions

LNG – Liquefied Natural Gas

German LNG, the first onshore regasification terminal to be built in Germany

German LNG will be located in Brunsbüttel and will be able to produce up to 8 BCMA

German LNG, the first onshore regasification terminal to be built in Germany

Share it:

German LNG, the first onshore regasification terminal to be built in Germany

Benefits

It will contribute to the security of energy supply in Germany and Europe

Contributes to the Germany energy transition process.

Characteristics

Equipment

Services

In figures

Storage

Production

The Joint Venture

Cobra (62%) and Sener (38%)

Energy

Thermal Generation

CCGT – Combined Cycle Gas Turbines

Two hydrogen-ready combined cycle power plants: Heilbronn and Altbach/Deizisau

GE Vernova’s first Class H power plants

Two hydrogen-ready combined cycle power plants: Heilbronn and Altbach/Deizisau

Share it:

Two hydrogen-ready combined cycle power plants: Heilbronn and Altbach/Deizisau

1,300 megawatts of electricity generation capacity

Capacity to power 2.4 million German homes

Supply of steam for district heating for the citizens, commerce and industry

Prepared for 100 % operation with H2.

A boost for the energy transition in Europe

Altbach/Deizisau power plant

Heilbronn power plant

Energy

Renewable and Low-Carbon Solutions Generation

Dams & Hydropower

Pumped-storage facility in Salto de Chira, on the island of Gran Canaria

Stored energy from renewable sources

Pumped-storage facility in Salto de Chira, on the island of Gran Canaria

Share it:

Pumped-storage facility in Salto de Chira, on the island of Gran Canaria

Pumped storage facility in Salto de Chira

Benefits

3.5 GWh storage capacity.

Energy from renewable sources.

Maximises the island’s energy independence.

Reduces fossil fuel imports.