CAF's HEMU prototype to be tested on the Spanish network

On 6 June 2023 the FCH2Rail project, in which a bi-mode demonstrator train with hydrogen fuel cells is being developed, has achieved an important milestone by obtaining authorisation to run in tests on the Spanish national network, and having completed the first of the routes planned with the arrival of the unit at Canfranc station, in the Aragonese Pyrenees. 

This is an outstanding highlight, because the Canfranc line is a particularly demanding line due to its steep and high gradients, which involve a great challenge for the new power generation systems. To this end, the demonstrator train, a Renfe’s Civia commuter unit, has run on the Zaragoza - Canfranc line both in electric mode, in the electrified area, and in hybrid mode, combining energy from hydrogen fuel cells and batteries in the non-electrified sections.

A new stage of on-track testing is now underway with the aim of testing the new technology in a wide range of power and energy demand conditions, simulating different commercial services. To this end, the train is scheduled to run on different lines of the Spanish network, mainly on lines in Aragon, Madrid and Galicia. The test scenarios include running under different climatic and operating conditions. This will allow a more complete characterisation of the new on-board technology, for the subsequent evaluation of the competitiveness of the new bi-mode hybrid propulsion solution with hydrogen fuel cells as a sustainable alternative to the diesel traction currently used on many lines.

After the static testing phase at the CAF’s plant in Zaragoza and the first hydrogen refuelling, the dynamic tests began in mid-2022 on a closed track, which have served to optimise the new power system prior to the current testing phase on representative lines of the Spanish network. The start of this new testing phase has meant the first authorisation from Adif for the circulation in tests of a hydrogen train on the Spanish railway infrastructure, passing all the risk analysis and safety validation processes inherent to the testing of new technologies. At the same time, the train drivers and train managers from Renfe have received the necessary training to drive the CIVIA train converted to a bi-mode hydrogen train.

This project began in early 2021 and is scheduled for completion by the end of 2024. It has a 14 million EUR  budget, 10 million of which is being funded by the Clean Hydrogen Partnership, formerly FCH2 JU, a European Commission agency dedicated to promoting the development of hydrogen and fuel cells.