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Properties of Granular Materials as Heat Transfer and Storage Medium in CSP application

Baumann, Torsten and Zunft, Stefan (2015) Properties of Granular Materials as Heat Transfer and Storage Medium in CSP application. Solar Energy Materials and Solar Cells, 143, pp. 38-47. Elsevier. DOI: 10.1016/j.solmat.2015.06.037 ISSN 0927-0248

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Official URL: http://www.sciencedirect.com/science/article/pii/S0927024815003062


A selection of granular natural and ceramic materials have been experimentally characterized with regard to their application as heat transfer and storage media in concentrating solar power plants. Thermophysical, thermomechanical, tribological and rheological measurements have been conducted in order to identify the most suitable candidates for this dynamic high temperature operation. Ceramic materials are found to comprise some advantages, but natural products offer a considerably more economical solution. Thermal bulk conductivity is found to be only marginally affected by the solid’s conductivity, while specific heat is almost the same for all solids. Ceramics entirely withstand thermal cycling, while quartz-containing materials are prone to severe degradation. Most materials are found to attain a saturated state of attrition while being sheared under load, wherein quartz sand offers the lowest mass fraction of debris at saturation level. In the investigated grain size range, all materials show excellent flowability. The generation of debris requires consideration in the design of the CSP storage components.

Item URL in elib:https://elib.dlr.de/96432/
Document Type:Article
Title:Properties of Granular Materials as Heat Transfer and Storage Medium in CSP application
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Baumann, Torstentorsten.baumann (at) dlr.deUNSPECIFIED
Zunft, Stefanstefan.zunft (at) dlr.deUNSPECIFIED
Date:December 2015
Journal or Publication Title:Solar Energy Materials and Solar Cells
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.solmat.2015.06.037
Page Range:pp. 38-47
Keywords:granular material; CSP; thermal energy storage; moving bed; heat exchanger
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Energy-efficient Processes (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Thermochemical Processes (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Baumann, Dr.Ing. Torsten
Deposited On:02 Dec 2015 08:25
Last Modified:31 Jul 2019 19:53

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