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Properties of Granular Materials as Heat Transfer and Storage Medium for CSP Plants with Thermal Energy Storage and Moving Bed Heat Exchanger

Baumann, Torsten und Roßkopf, Christian und Zunft, Stefan (2013) Properties of Granular Materials as Heat Transfer and Storage Medium for CSP Plants with Thermal Energy Storage and Moving Bed Heat Exchanger. EUROMAT, 2013-09-08 - 2013-09-13, Sevilla, Spanien.

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Kurzfassung

The dispatchability of Concentrating Solar Power (CSP) plants and a further reduction of levelized electricity costs are strong incentives for the development of cost-efficient technical solutions for thermal storage systems. A heat storage system using movable fine-grained particles as storage material is a technology option that offers novel low-cost solutions. To deploy such a storage concept, the application of a Moving Bed Heat Exchanger is likely the most efficient way to recover the stored heat from the particles and to run a Rankine steam cycle. The granular inventory has to meet solar-specific requirements. Also, the materials’ properties and their long-term behavior provide important information on the optimal design and operation of the storage/heat-exchanger system. To that end, granular natural and ceramic materials have been experimentally characterized with regard to their application as sensible heat transfer and storage media in a dynamic high temperature operation. Those materials potentially offer high heat capacities and high operation temperatures. Thermo-physical, thermo-mechanical, tribological and rheological measurements have been conducted. Thermal bulk conductivity is found to be only marginally affected by the solid’s conductivity. Specific heat is almost the same for all solids. Ceramics entirely withstand thermal cycling, while quartz sand is prone to severe degradation. Most materials are found to attain a saturated state of attrition when they are sheared under mechanical load, where quartz sand offers the lowest mass fraction of debris at saturation level. In the grain size range regarded here, all materials show an excellent flowability. Nevertheless, the presence of debris affects the flowability and thus requires consideration in the design of the device. Concluding, ceramic materials are found to have advantages, but natural products offer a considerably more economical solution.

elib-URL des Eintrags:https://elib.dlr.de/86287/
Dokumentart:Konferenzbeitrag (Poster)
Titel:Properties of Granular Materials as Heat Transfer and Storage Medium for CSP Plants with Thermal Energy Storage and Moving Bed Heat Exchanger
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Baumann, Torstentorsten.baumann (at) dlr.dehttps://orcid.org/0000-0002-6748-4009NICHT SPEZIFIZIERT
Roßkopf, Christianchristian.rosskopf (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Zunft, Stefanstefan.zunft (at) dlr.dehttps://orcid.org/0000-0002-8499-3067NICHT SPEZIFIZIERT
Datum:September 2013
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:granular materials, moving bed, heat exchanger, thermophysical, attrition, rheology
Veranstaltungstitel:EUROMAT
Veranstaltungsort:Sevilla, Spanien
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:8 September 2013
Veranstaltungsende:13 September 2013
Veranstalter :Federation of European Materials Societies
HGF - Forschungsbereich:Energie
HGF - Programm:Rationelle Energieumwandlung und Nutzung (alt)
HGF - Programmthema:Energieeffiziente Prozesse (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E EV - Energieverfahrenstechnik
DLR - Teilgebiet (Projekt, Vorhaben):E - Thermochemische Prozesse (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Thermische Prozesstechnik
Hinterlegt von: Baumann, Dr.Ing. Torsten
Hinterlegt am:09 Dez 2013 14:27
Letzte Änderung:24 Jun 2024 14:58

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