Alfa Laval has been selected to provide electrolyzer cooling technology for the Onuba H2 project in Huelva, a landmark development that is set to become the largest renewable hydrogen project in Southern Europe.
Led by Moeve, the project is being developed at the La Rábida Energy Park as the industrial anchor of the Andalusian Green Hydrogen Valley, one of Europe’s most ambitious renewable hydrogen initiatives.
Onuba H2 will initially feature 300 MW of electrolysis capacity, with an option to add a further 105 MW. Once operational, the plant is expected to produce up to 45,000 tonnes of green hydrogen annually, supporting the decarbonization of transport and energy-intensive industries.
Alfa Laval will supply 60 heat exchangers covering balance-of-plant cooling, electrolyzer cooling and gas cooling. The equipment will play a critical role in controlling operating temperatures across the facility, helping ensure the efficiency, reliability and safety of large-scale hydrogen production.
“We are honored to contribute with our expertise and technology to the Onuba H2 project, which stands at the forefront of Europe’s energy transition,” said Thomas Møller, President Energy Division, Alfa Laval. “Our heat transfer solutions are designed to support the ambitious goals of decarbonizing industry and transport, while advancing Europe’s energy security.”
The project’s strategic importance extends beyond Spain. The European Commission has designated the Andalusian Green Hydrogen Valley a Project of Common Interest (PCI), a status intended to facilitate access to public funding and accelerate infrastructure supporting Europe’s energy transition and security.
Green hydrogen is expected to play a critical role in cutting carbon emissions from sectors where direct electrification remains challenging, including heavy transport and energy-intensive industrial operations.
With abundant renewable energy resources, established infrastructure and a strategic location, Andalusia is emerging as a major hub for green hydrogen. Onuba H2 is positioned to put that advantage to work at industrial scale—strengthening Spain’s role in Europe’s hydrogen economy while helping drive the continent’s broader shift toward cleaner energy.
