Techno economic design of a solid oxide electrolysis system with solar thermal steam supply and thermal energy storage for the generation of renewable hydrogen. (19th October 2017)

• Record Type: Journal Article
• Authors: Seitz, M.; von Storch, H.; Nechache, A.; Bauer, D.
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 42(2017)
• Page Start: 26192
• Page End: 26202
• Publication Date: 2017-10-19
• Subjects: Power-to-Gas -- Solid oxide electrolysis system -- Direct steam generation -- Latent heat thermal energy storage -- Phase change material -- Economic yield assessment; ASR Area specific resistance -- CAPEX Capital expenditures -- CSP Concentrating solar power -- DNI Direct normal irradiance -- EPC Engineering-procurement-construction -- HHV Higher heating value -- HTF Heat transfer fluid -- HTX Heat exchanger -- IAM Incidence angle modifier -- LCOH Levelized costs of hydrogen -- LHTES Latent heat thermal energy storage -- OPEX Operational expenditures -- PCM Phase change material -- SC Steam conversion -- SF Solar field -- SOEC Solid oxide electrolysis cell -- TES Thermal energy storage -- TMY Typical meteorological year -- TTD Terminal temperature difference; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.08.192
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The dependency of renewable energy systems on environmental influences such as sun or wind availability is one of the greatest challenges in the energy transition. For this purpose, it is important to develop electro chemical storage systems for long-term storing of renewable electricity in the form of hydrogen or methane. In the presented work, an electrolysis system with solid-oxide electrolyser stacks is designed. A solar thermal receiver is used to produce the steam supplied to the electrolyser stacks. On the other hand, a thermal energy storage, using a phase change material, is used for the extension of the operational hours during the night time. The system is optimized to minimize the levelized costs of hydrogen and compared to a system without a thermal energy storage. Finally, the cost sensitivity for the four main components of the cost structure is evaluated and discussed. Highlights: Coupling of a solar thermal receiver with a solid oxide electrolysis cell. Latent heat thermal energy storage integration into the system. Parametric study for determination of the lowest hydrogen costs. Sensitivity study of four main components of the cost structure.