Stara Zagora is a strategic logistic centre in Bulgaria and the Balkan Peninsula. It is also host to one of the biggest power production complexes in Europe (Maritsa East). This makes it the perfect location to showcase the versatility and potential of green hydrogen as means to improve air quality in the city, reduce CO2 emissions for energy production and mobility applications, and generate economic welfare. The demonstration of clean, safe, and sustainable hydrogen technology applications will improve public perception of hydrogen ecosystems, and kick start a hydrogen-based economy not only in the region but across the country. ZAHYR will install and demonstrate two electrolysers with a combined installed power of 5MW, to be run on green electricity produced in a new 20MW PV plant. The hydrogen produced will be used in various transport and energy applications. These include the installation of two Hydrogen Refuelling Stations to service a fleet of 10 city buses, 2 heavy transport trucks and 2 light-duty vehicles. A bi-fuel gas turbine will be installed in which blending limits between hydrogen and natural gas will be tested. A 1MW fuel cell at Stara Zagora will provide the municipality’s public night lighting, showcasing how this municipality can become net zero emission. Finally, a broad training and education program will be set up resulting in a master’s degree. An intense replicability activity will be carried out based on the organization of the Hydrogen Valley Development Group.

The hydrogen fuel cell (FC) bus is one of very few options for the elimination of harmful local emissions and the decarbonisation of public transport. Its performance has been validated in Europe in recent years through various demonstration projects, however, a number of actions are required to allow the commercialisation of FC buses. These include addressing the high ownership costs relative to conventional buses, ensuring the FC buses can meet the high availability levels demanded by public transport, developing the refuelling infrastructure to provide reliable, low-cost hydrogen and improving the understanding of the potential of FC buses for zero emission public transport. JIVE will pave the way to commercialisation by addressing these issues through the deployment of 142 fuel cell buses across 8 locations, more than doubling the number of FC buses operating in Europe. JIVE will use coordinated procurement activities to unlock the economies of scale which are required to reduce the cost of the buses. They will operate in large fleets of 10-30 buses, reducing the overhead costs per bus, as well as allowing more efficient supply chains and maintenance operations compared to previous deployments. By working at this scale and with bus OEMs with proven vehicles, JIVE will ensure reliability at the level required for commercialisation. JIVE will also test new hydrogen refuelling stations with the required capacity to serve fleets in excess of 20 buses. This will not only reduce the costs of hydrogen and increase the availability of equipment but will also test the ability to offer >99% reliability, which is required for the commercialisation of FC buses. A dissemination campaign will use the project results to demonstrate the technical readiness of FC buses to bus operators and the economic viability of hydrogen as a zero emission bus fuel to policy makers will help to catalyse the future development and expansion of the hydrogen bus sector.