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The aim of
the ITES-project is the development of a thermal energy storage system
for parabolic trough power plants with direct steam generation. Steam is
produced in the solar field by pre-heating, evaporating and superheating
the water. The thermal storage system has to provide the same process
when it is discharged. For this reason individual storage concepts are
used for the three sections: Sensible heat storage in concrete material
and latent heat storage in phase-change materials. Both types have
already been examined in previous research projects.
The design
and operation of a solar power plant with such energy storage is
analyzed for transient behavior and yearly electricity production. The
three storage modules for a steam temperature of 400°C are designed,
erected and operated at the DISS test loop at the Plataforma Solar de
Almeria (PSA). Further work-packages deal with increasing the storage
temperature to 500°C and special control aspects for direct steam
generation.
Schematic
diagram of a direct steam generation power plant with thermal energy
storage
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