The hydrogen core network forms an essential basis for the development of a German hydrogen economy. The distribution networks are essential for supplying power stations, industry and other consumers, a large proportion of which cannot be supplied directly via the hydrogen core network. They enable hydrogen to be distributed throughout the country.

One example is the joint study 'Hydrogen Network Central Germany 2.0', in which a hydrogen infrastructure has been developed for the Central German region with 54 partners (network operators, consumers, producers, supporters). This includes 1,099 km of hydrogen pipelines and connects the hydrogen core network with the future hydrogen consumers and producers in the region.

A key focus in the development of the hydrogen infrastructure is the conversion of existing gas networks for the transport and distribution of hydrogen. The necessary steps include the assessment of H2-readiness and the definition of measures for the demand-oriented adaptation of the networks, including the determination of the resulting costs.

The assessment of the H?-readiness of the existing gas infrastructure requires detailed data from network operators, but also the structured collection and provision of information regarding the hydrogen-related suitability of products used in the gas system. For this purpose, the HydrogenReady database verifHy has been set up.

In addition, the conversion process must be prepared for each network. This includes the definition of a target network structure and conversion areas, but also, for example, the installation of shut-off valves to separate sub-networks during conversion.

The German gas infrastructure can be used for a CO?-free energy supply and can be converted to hydrogen with appropriate network upgrading measures. Network operators should start planning the H2 conversion of gas networks at all levels at an early stage.