IDEA’s corporate philosophy is based on the decarbonisation of the planet, which is why we collaborate in projects where the Green Hydrogen energy carrier is used as a raw material or fuel.

We offer engineering and consulting services throughout the lifetime of green H2, the study of photovoltaic plants for renewable electricity generation, design of the electricity distribution lines and associated substations for energy transport, concurrent engineering with the electrolyser technologist for the definition of the hydrogen plant, consultancy and definition of the H2 storage and handling system, to finally make the integration for its final use, both as raw material for industrial use and as fuel for transport.

Green Hydrogen

H2 Green Definition

Renewable hydrogen, also known as green hydrogen, is produced through a chemical process known as water electrolysis, where through electric current from renewable sources, hydrogen is separated from the oxygen in the water; this is a process in which CO2 is not emitted into the atmosphere and energy is produced.


This process is the decomposition of water molecules (H2O) into its elements, hydrogen (H2) and oxygen (O2), when an external electric current (electricity from renewables) is applied.

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    The water used contains salts and minerals to conduct electricity.
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    Two electrodes (cathode and anode) immersed in water connected to a continuous power source.
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    The dissociation of H2 and O2, occurs when the electrodes attract the oppositely charged ions to themselves.
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    An oxidation-reduction reaction occurs.

Types of Electrolysers

solid state electrolysis

Conventional Alkaline Electrolysis

This involves the immersion of both electrodes in an alkaline liquid electrolyte which conducts OH– anions. The electrodes are separated by a diaphragm.
  • No need for noble metals.
  • Low current densities.
  • Not ideal for accumulating renewable energy→ Response time is high. They are attached to a battery as energy accumulators.
  • Approx. 40 MW capacity.
solid state electrolysis

Proton-Conducting Polymeric Membrane Electrolysis (PEM)

This is a type of electrolysis where the electrolyte is a solid polymeric membrane that conducts H+.
  • It requires noble metals.
  • The current densities obtained are the highest.
  • Ideal for storing renewable energy → Very fast response time.
  • Approx. 6-10 MW capacity.
solid state electrolysis

Solid State Electrolysis

It is a solid system that works at high temperatures (500-1000 °C). The electrolyte is an oxygen ion conductor (O2-).
  • It requires noble metals.
  • It works at high pressure and can be reversed to a fuel cell.
  • Not ideal for storing renewable energy→ High temperatures.
  • Approx. 10 kW capacity.

Services offered by IDEA in the design of H2Green Plants

Photovoltaic Plant

  • Energy audits and feasibility studies
  • Technical processing
  • Processing and administrative management
  • Project development and engineering
  • Construction
  • Commissioning
  • Maintenance

Distribution Lines and Substations

Engineering for the implementation of high voltage systems, both DISTRIBUTION AND TRANSPORT LINES (HV and LV up to 400 KV) as well as SUBSTATIONS AND GENERATION PLANTS.

All transport and distribution network projects involve different specialties such as civil, mechanical and electrical works, remote control, environmental impact, topography, etc.

Stages of the Project:

Previous Studies

  • Consultancy and feasibility studies.
  • Basic engineering.
  • Permit acquisition.

Development of the Project

  • Administrative authorisation projects.
  • Construction projects: civil, mechanical and electrical works, automation, installations.
  • Detailed engineering: specifications, drawings and budgets.
  • Topography.
  • Environmental impact.

Execution of the Work.

  • Comprehensive construction management: logistics and procurement, cost control, deadlines and quality.
  • Site management and supervision.
  • Health and safety coordination.

Concurrent Engineering in Plant Design

IDEA, together with ICONSA, a GROUP company, and thanks to our expertise in photovoltaic plants, electrical distribution, and in the management and storage of H2 for the generation of ammonia, carries out the Consultancy work as Concurrent Engineering with Technologists specialised in the electrolysis process for the generation of H2.

We collaborate with partners nationwide, with more than 20 years of experience in the electrolysis processes for the generation of H2, such as ARIEMA.

Analysis of PI&D processes

  • Customised adaptation to productive systems.
  • Matter and energy balances.
  • Analysis of possible alternatives.

Determination of Equipment and Installations

  • Electrolyser.
  • Water storage tank.
  • H2 and O2 pressure tank.
  • Topography.
  • H2 and O2 compression.
  • Storage of H2 in type IV cylinders.
  • Air cooler.

H2 Consultancy

  • Technical feasibility studies for the implementation of H2 manufacturing units.
  • Studies for the reuse of current facilities.
  • Economic feasibility studies.

H2 handling and storage

IDEA and ICONSA offer extensive experience in the development of projects for the main industries and large Hydrogen consumers: the Petrochemical and Fertiliser Industries.

Study and Design of Plants

  • Design of new process units, storage units, gas scrubbing units …
  • Adaptation of current plants to new manufacturing processes.
  • Capacity expansion studies for current plants.

Equipment Study and Design

  • Compressors, separators, heat exchangers… to adapt the H2 consumed to the conditions required by clients.
  • Analysis and improvements in the operation of current equipment.

H2 storage

  • Type IV cylinders in 300 bar containers.
  • In large metal tanks.

Final Use Integration

  • Industrial Sector
    To produce green ammonia or methanol and process heat by feeding it into the natural gas network as hydrogen or by methanation with CO2 capture.
  • Residential Sector
    To produce alternative fuel to natural gas.



Contact us

You may use the contact form at the bottom and email us. And of course, you can call us by phone at (+34) 968 500 805 , and we will resolve any enquiries.

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