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If the superheated steam for the turbines is already generated in the collector, this is referred to as direct solar steam generation. If this is utilised, solar thermal power plants work particularly efficiently. Combined with a new storage solution, they can also deliver electricity at night and at times with low solar irradiation. The newly published BINE-Projektinfo brochure 11/2017, entitled “Night-time electricity from solar power plants”, presents the system consisting of latent heat and cascade storage units.
Storage system for solar thermal power plants further developed
The cascade storage system consists of three tanks with different temperature levels (527 °C, 400 °C and 306 °C). This multi-stage solution enables the heat energy from the collector to be almost completely stored. The tanks absorb the heat in molten salts through temperature increases. The molten salts are located in insulated steel tanks. The latent heat storage unit forms the fourth part of the overall system. This is used when the injected steam has cooled down to such an extent that only the condensation energy can be decoupled.
The storage system is designed for use in all solar thermal power plants with direct steam generation: it is suitable for parabolic troughs, linear Fresnel collectors and tower receivers.
Researchers from the German Aerospace Centre have further developed the latent heat storage system based on nitrate salts together with its industrial partner Linde AG.
You found all informations about the BINE Projectinfo brochure entitled "Night-time electricity from solar power plants" here:
http://www.bine.info/en/press/press-releases/press/pressemitteilung/sonnenstrom-...
Uwe Milles/Birgit Schneider
presse(at)bine.info
About BINE Information Service
Energy research for practical applications
The BINE Information Service reports on energy research topics, such as new materials, systems and components, as well as innovative concepts and methods. The knowledge gained is incorporated into the implementation of new technologies in practice, because first-rate information provides a basis for pioneering decisions, whether in the planning of energy-optimised buildings, increasing the efficiency of industrial processes, or integrating renewable energy sources into existing systems.
About FIZ Karlsruhe
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The BINE-Projektinfo “Night-time electricity from solar power plants”
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