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A novel hydrogen combustion engine technology trial, led by the European Marine Energy Centre (EMEC), has been installed at Kirkwall Airport in Orkney.

It is the first time hydrogen has been used to meet both the power and heat demands of a commercial airport in the UK.

Manufactured by German firm 2G Energy, the system is described as the first 100% hydrogen combined heat and power (CHP) unit of its kind to be installed in the UK. It was positioned airside at Kirkwall Airport and coupled with the airport鈥檚 existing heating system to supply heat to the main terminal building and power across the entire site.

Funded by the Scottish government via Highlands & Islands Enterprise and supported by work through the Sustainable Aviation Test Environment (SATE) and Rural Energy Hubs projects, the trial brought together representatives from EMEC and 2G, with support from Highlands & Islands Airports Limited (HIAL), which operates Kirkwall Airport.

The CHP system used green hydrogen, supplied by EMEC, to generate electricity and recover by-product heat.

Working with airport ground staff, additional electrical loads were activated to test the system, allowing the CHP to supply a steady output. System performance and integration were monitored with the CHP system operating at about 60% capacity. During the trial, the CHP powered the airport terminal and runway lighting, and met the heating demand without the need for the airport鈥檚 boilers to run.

EMEC operations and maintenance manager Leonore Van Velzen said: 鈥淭his project was initially driven by an energy consumption study delivered by EMEC through the ReFLEX Orkney project, which identified key opportunities to decarbonise airport operations.

鈥淥rkney is well established as a hub for energy innovation, where new technologies and their roles in delivering a future clean energy system are demonstrated.

鈥淭his trial is a great example of collaboration in action, combining EMEC鈥檚 hydrogen expertise, the technical capabilities of 2G, and the operational insight of HIAL鈥檚 airport team, specifically the airport fire service. Seeing hydrogen deployed in a live airport environment is a significant step forward in exploring practical decarbonisation solutions, and we鈥檙e proud to have supported the safe delivery of this first-of-its-kind demonstration.鈥�

2G managing director Mark Holtmann, said: 鈥淒emonstrating how hydrogen can reliably deliver both power and heat in such a critical infrastructure setting is an important step towards decarbonising energy-intensive operations. This project showcases what鈥檚 possible when innovation and collaboration come together, and we鈥檙e proud to see 2G鈥檚 technology contributing to Scotland鈥檚 leadership in the transition to net zero aviation.鈥�

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