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Material issues for concentrated solar power (CSP)

Schmücker, Martin (2019) Material issues for concentrated solar power (CSP). Pacific Rim Conference of Ceramic Societies, 27.10.2019- 31.10.2019, Ginowan, Okinawa (Japan).

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Abstract

By concentrated solar radiation, thermal energy can be obtained to be used for power generation or for thermal process engineering. However, there are still a number of material issues to be resolved: Specific functional demands must be fulfilled and long-term stability under cyclic thermal load and harsh environmental conditions is required. In case of open volumetric solar absorbers ubiquitous mineral dust may deposit on hot SiC surfaces. The influence of mineral dust on absorbance and corrosion was investigated in detail. Refractive ceramic particles can be used in specially designed particle receivers. High absorbance, sufficient mechanical stability and low production costs are the crucial properties. Pros and cons of commercial alumina-based pellets ("Proppants") and possible alternative raw materials are discussed. Heat storage and related material challenges is another important topic in CSP technology. A new cost-cutting approach for salt-based heat storage is "diluting" the salt melt with cheap inorganic materials. Beside specific heat capacity and costs, stability against highly corrosive nitrate melts is the most important property of such filler materials. Another approach for heat storage is heat-absorption and release, respectively, by reversible chemical reactions. Manganese-based redox systems are promising materials for heat storage. Thermodynamic conditions, microstructure and its influence on redox kinetics will be discussed.

Item URL in elib:https://elib.dlr.de/130378/
Document Type:Conference or Workshop Item (Speech)
Title:Material issues for concentrated solar power (CSP)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmücker, MartinMartin.Schmuecker (at) dlr.deUNSPECIFIED
Date:2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CSP, absorber, airborne dust, thermal storage, absorbing particles
Event Title:Pacific Rim Conference of Ceramic Societies
Event Location:Ginowan, Okinawa (Japan)
Event Type:international Conference
Event Dates:27.10.2019- 31.10.2019
HGF - Research field:Energy
HGF - Program:Energy Efficiency, Materials and Resources
HGF - Program Themes:Methods and Concepts for Materials Development
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Materials for Energy Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Structural and Functional Ceramics
Deposited By: Schmücker, Dr.rer.nat.hab. Martin
Deposited On:11 Nov 2019 18:21
Last Modified:11 Nov 2019 18:21

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