TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Schäfer, Dominik
A1  - Janßen, Tomke
A1  - Fang, Qingping
A1  - Merten, Frank
A1  - Blum, Ludger
T1  - System-supporting operation of solid-oxide electrolysis stacks
N2  - Flexible, system-oriented operating strategies are becoming increasingly important in terms of achieving a climate-neutral energy system transformation. Solid-oxide electrolysis (SOEC) can play an important role in the production of green synthesis gas from renewable energy in the future. Therefore, it is important to investigate the extent to which SOEC can be used flexibly and which feedback effects and constraints must be taken into account. In this study, we derived a specific load profile from an energy turnaround scenario that supports the energy system. SOEC short-stacks were operated and we investigated the impact that the load profile has on electrical stack performance and stack degradation as well as the product gas composition by means of Fourier-transform infrared spectroscopy. The stacks could follow the grid-related requirement profiles of secondary control power and minute reserves very well with transition times of less than two minutes per 25% of relative power. Only short-term disturbances of the H2/CO ratio were observed during transitions due to the adjustment of feed gases. No elevated degradation effects resulting from flexible operation were apparent over 1300 h, although other causes of degradation were present.
T2  - Energies
VL  - 14
Y1  - 2021
UN  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bsz:wup4-opus-76579
U6  - https://dx.doi.org/10.3390/en14030544
DO  - https://dx.doi.org/10.3390/en14030544
IS  - 3
ER  -