Phoebus-Julich: An autonomous energy supply system comprising photovoltaics, electrolytic hydrogen, fuel cell

摘要

The fluctuating offer of renewable energies and their, in most cases, not synchronous use make it necessary to develop processes of energy storage both for short-term, relatively small amounts of energy with great power fluctuations and for long-term (seasonal large energy volumes. The growing share of solar electric energy makes the storage problem an ever increasing priority since grid storage Is only possible to a limited extent. A hydrogen storage system based on water electrolysis, storage of the H_2/O_2 product gases, and reconversion into Electric energy via a fuel cell is well suited for the long-term storage of electricity.