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Thermochemical Systems



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  • Test stand CWS - Heat storage in lime stone
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    Immobile thermochemical heat accumulator on a pilot plant scale: As part of the BMWi project CWS, a thermochemical heat accumulator on a pilot plant scale was set up at DLR in Cologne. The reactor has a thermal power of up to 10 kW and a capacity of 8 kWh of chemically stored energy (corresponds to approx. 22 kg Ca(OH)2).

    Credit: DLR..

  • Hydrogen storage with metal hydrides
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  • Test facility THETA
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Research Area Management: Dr. Marc Linder

The research area „Thermochemical Systems“ focuses on reversible gas-solid reactions and their application in the fields of energy storage and conversion. Different reaction systems utilizing hydrogen, oxygen or water vapor as gaseous reactants are investigated for applications in industrial processes, solar power plants as well as for mobile applications. The main focus of the research area is on the realization of innovative storage and reactor concepts and their demonstration in laboratory or pilot plant scale.

 

Research areas and current projects:

Thermochemical Storage of Heat

Since the thermal energy is chemically stored as heat of reaction, this storage technology offers several advantages such as:

  • high storage density
  • loss-free long-term storage
  • low-cost storage materials

Depending on the reaction system, the thermochemical storage can be used in a wide temperature range - starting from below room temperature up to 1000 °C.

Heat transformation

Due to the pressure dependency of gas-solid reactions, thermochemical systems can also be used to transform heat. In this case the temperature of the discharging process can be higher than the temperature necessary for the charging process which is especially interesting for the thermal upgrade of industrial waste heat.

Solid State Hydrogen Storage

The principle of solid state hydrogen storage is based on a chemical bonding between the hydrogen gas and a solid material. Therefore, solid state hydrogen offers the possibility to safely store hydrogen at low pressures with high storage densities. Depending on the storage material, the chemical reaction can also be used for other applications such as thermal energy storage or gas separation.

Automotive thermal management

Gas-solid reactions also offer the possibility to separate the reactants easily. Therefore, the thermochemical storage is principally loss-free and its heat release controllable. In combination with high storage and power densities, thermochemical systems can therefore offer interesting applications in the context of automotive thermal management.


Contact
Dr.-Ing. Marc Linder
Acting Head of Department Thermal Process Technology,
Research Area Manager Thermochemical Systems

German Aerospace Center

Institute of Engineering Thermodynamics
, Thermal Process Technology
Stuttgart

Tel.: +49 711 6862-8034

Fax: +49 711 6862-632

Publications

Literature of the research area Thermochemical Systems


Publications to be found on DLR ELIB
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Arbeitsgebiete
High-performance Thermochemical Reactors
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