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Thermal model for the optimization of a solar rotary kiln to be used as high temperature thermochemical reactor

Tescari, Stefania and Neises, Martina and de Oliveira, Lamark and Roeb, Martin and Sattler, Christian and Neveu, Pierre (2013) Thermal model for the optimization of a solar rotary kiln to be used as high temperature thermochemical reactor. Solar Energy, 95, pp. 279-289. Elsevier. ISSN 0038-092X.

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Official URL: http://dx.doi.org/10.1016/j.solener.2013.06.021


The present study focuses on a thermal model describing a rotary kiln reactor. Several applications can be foreseen for this reactor, for example high temperature heat storage for thermal solar power plants. The energy is provided by concentrated solar radiation that heats up the cavity walls. A thermal model, describing the reactor behavior, is developed and validated. Particular attention is given to the radiation model, which constitutes the most important heat transfer. An innovative way of modeling the reactor aperture through a fictive surface at an imposed equivalent temperature leads to a significant decrease of the simulation time, without decreasing the precision of the solution. The model is validated by comparison first with other models, which make different assumptions and second with experimental results. After the validation, the model can be used for simulating the behavior under different operating condition or to define the possible improvements by a change of the reactor geometry such as the insulation’s thermal conductivity or thickness.

Item URL in elib:https://elib.dlr.de/83505/
Document Type:Article
Title:Thermal model for the optimization of a solar rotary kiln to be used as high temperature thermochemical reactor
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Tescari, Stefaniastefania.tescari (at) dlr.deUNSPECIFIED
Neises, Martinamartina.neises (at) dlr.deUNSPECIFIED
de Oliveira, Lamarklamark.de-oliveira (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.roeb (at) dlr.deUNSPECIFIED
Sattler, Christianchristian.sattler (at) dlr.deUNSPECIFIED
Date:18 June 2013
Journal or Publication Title:Solar Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 279-289
EditorsEmailEditor's ORCID iD
Epstein, Michaelmichael.epstein@weizmann.ac.ilUNSPECIFIED
Keywords:Cavity reactor; Rotary kiln; Radiation model; Equivalent aperture temperature; High temperature solar reactor
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solare Verfahrenstechnik (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solare Verfahrenstechnik
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:22 Jul 2013 14:57
Last Modified:22 Jul 2013 14:57

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