Development of a high temperature storage unit for integration with solar dynamic systems

Physics

Scientific paper

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Corrosion Prevention, Heat Storage, Lithium Fluorides, Phase Change Materials, Solar Dynamic Power Systems, Energy Storage, Recrystallization, Space Station Power Supplies, Spacecraft Power Supplies, Tanks (Containers)

Scientific paper

Lithium fluoride in its capacity as a suitable energy storage material is investigated. Energy is stored as latent heat by melting the LiF. The energy is later released during recrystallization of the salt. Drawbacks to this system are described. The high corrosivity in molten state may lead to container failure in long term use. In order to avoid destruction of canisters, a graphite container is developed as graphite is not wetted by liquid LiF and thus does not suffer any corrosion. In order to match the mechanical forces caused by the volume increase during melting, a channel-like internal structure is tested. The melt formed first can expand into these channels and no pressure is built up. The results of these tests are presented.

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