H2HEAT TECHNOLOGY
H2HEAT is designed to move green hydrogen for heating from idea to application and from laboratory development to the market. The project brings together renewable energy, hydrogen production, smart energy management, combined heat and power, and heat-pump technology in one integrated demonstration in Gran Canaria, Spain.
One integrated technology system
The value of H2HEAT lies in the connection between its individual technologies. The project is not testing an electrolyser, a CHP unit or a control system in isolation. It is demonstrating how these components can operate as one flexible energy system.
Combined Heating & Power by 2G Solutions
Producing green hydrogen is only useful if it can be converted into dependable energy for a real consumer. H2HEAT addresses this challenge through a 100% hydrogen combined heat and power system developed by project partner 2G. Most hydrogen heating applications are still at the research, development or early demonstration stage.
Hydrogen blending is being explored in condensing boilers, while hybrid systems combine hydrogen boilers with heat pumps. H2HEAT takes a more ambitious route. Its 100% hydrogen CHP will be demonstrated at commercial scale and connected to the heating needs.
Electrolyser by Stargate Hydrogen
Alkaline electrolysers are among the more mature technologies for producing hydrogen. However, conventional designs can depend on electrode materials that include precious metals. These materials add cost and create a strategic risk as demand for electrolysers grows.
H2HEAT partner Stargate Hydrogen is developing an advanced alkaline electrolyser based on nanoceramic active materials. The objective is straightforward: reduce reliance on precious metals without sacrificing efficiency, performance or hydrogen quality.
Stable combustion and precise injection
Hydrogen behaves differently from natural gas. It has a high flame speed and a wide flammability range, so the combustion process must be controlled with great precision. In the 2G system, hydrogen and air are managed close to the combustion chamber. Hydrogen is injected through a Hoerbiger injection valve, while the turbocharger compresses the combustion air.
Flexible operation
A hospital cannot depend on a system that only works under ideal conditions. The H2-CHP must respond to changing heat and electricity requirements. It will therefore be designed to start, stop and operate at part load. It will also be capable of island-mode operation and rapid load response, helping it adapt to consumer demand and renewable-energy availability.
H2-CHP and heat-pump integration
H2HEAT combines the 2G hydrogen CHP with a high-efficiency heat pump. The combination is particularly relevant to industrial and commercial users that need low-temperature heat below 100°C. Heat pumps are well suited to this type of demand because they transfer heat rather than generate it directly.
Smart energy management
Renewable electricity is variable. Offshore wind production does not always match the electricity needed by the electrolyser, the storage system, the CHP or the hospital. H2HEAT will address this challenge through a smart digital control system that coordinates supply, production, storage and demand.
Designed for marine conditions
Hydrogen projects on islands and near the sea face a practical engineering problem: salt, humidity and wind can accelerate corrosion and increase maintenance requirements. Previous island demonstrations have shown that marine conditions cannot be treated as a minor design detail.
From demonstration to replication
H2HEAT will demonstrate the complete technology chain in an operational environment and monitor its performance over an extended period. The project is intended to reach at least Technology Readiness Level 7, providing evidence on technical performance, reliability, safety, operation and maintenance, and cost effectiveness.
The demonstration at Gran Canaria is also a test of the business case for green hydrogen heating. Hospitals, hotels and other large buildings need reliable heat every day. They cannot adopt new energy systems based on laboratory results alone. They need proven performance, clear operating procedures, manageable maintenance and a credible route to long-term supply.
By connecting renewable electricity, low-cost electrolysis, smart control and 100% hydrogen CHP with a real heat demand, H2HEAT will provide the practical evidence needed to move the technology towards wider deployment across the Canary Islands and other European island regions.
Technology at a glance
| Technology | Role in H2HEAT |
|---|---|
| Offshore wind | Provides renewable electricity for hydrogen production. |
| Advanced alkaline electrolyser | Produces green hydrogen and oxygen using nanoceramic active materials without precious-metal electrodes. |
| Hydrogen storage and distribution | Manages the supply of hydrogen between production and the hospital energy system. |
| 100% hydrogen CHP | Converts hydrogen into electricity and useful heat for end user. |
| Heat pump | Raises the amount of useful low-temperature heat delivered to the hospital. |
| EMS, DSM and SCADA | Coordinates variable renewable generation, hydrogen production, storage and heat demand. |
| Nearshore infrastructure | Enables testing in marine conditions with practical access for maintenance and monitoring. |
Why this technology matters
H2HEAT is not proposing hydrogen as a universal replacement for every heating technology. Heat pumps will often be the most efficient option where suitable electricity and heat sources are available. The project focuses on a harder problem: how green hydrogen can serve large heat users that need reliable, flexible and dispatchable energy, particularly in island systems with limited grid capacity.
Its contribution is therefore practical. H2HEAT will test the full chain from renewable power to hydrogen production, storage, conversion and useful heat. It will address the technical barriers, cost pressures, marine risks and control requirements that must be solved before green hydrogen heating can move from promising concept to dependable infrastructure.
In doing so, H2HEAT will advance green hydrogen for heating and oxygen both from idea to application and from lab to market.
