Dynamic hydrogen storage: Integrated model of electrolysis and gas conditioning
Fluctuating renewable energies can be used to produce hydrogen with dynamically operating electrolysis units. Hydrogen can be stored and used as energy carrier to make renewable energies dispatchable. However, the hydrogen needs to be conditioned after electrolysis, as it has to fulfill rigorous criteria concerning purity and pressure level. The corresponding gas conditioning steps are energy-intense and significantly contribute to the overall process costs. In addition, the electrolysis and the gas conditioning are directly coupled by the hydrogen flux and consequently affect each other. In this research project, we quantify the energy demand of the complete process chain by the use of dynamic models. Furthermore, we will determine the influence of process and system parameters on the energy demand and the system dynamics. This study will help to identify energy saving potentials for power-to-gas applications, and therefore promote the use of hydrogen as energy storage medium and the integration of renewable energies in the long term.
JARA-ENERGY Seed Fund projectCopyright: JARA
September 1, 2015 to August 31, 2016
Institute of Energy and Climate Research, Electrochemical Process Engineering (IEK-3), FZ Jülich, Website: http://www.fz-juelich.de/iek/iek-3/EN/Home/home_node.html