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Experimental and Numerical analysis of a Solar Rotary Kiln for Continuous Treatment of Particle Material

Tescari, Stefania and Moumin, Gkiokchan and Bulfin, Brendan and de Oliveira, Lamark and Schaefer, Stefan and Overbeck, Nicolas and Willsch, Christian and Spenke, Carsten and Thelen, Martin and Roeb, Martin and Sattler, Christian (2018) Experimental and Numerical analysis of a Solar Rotary Kiln for Continuous Treatment of Particle Material. In: AIP Conference Proceedings, 2033 (103001). SolarPACES 2017, 26.-29. Sep. 2017, Santiago, Chile. DOI: 10.063/1.5067148

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Official URL: https://aip.scitation.org/doi/abs/10.1063/1.5067148

Abstract

Several energy intensive industrial processes, such as cement production, require particulate material to be treated at high temperatures. Renewable energy could be used to remove the reliance upon fossil fuels in such processes, and of the available technologies concentrated solar energy is perfectly adapted to provide a high temperature energy source. With this objective, the present study focuses on a solar reactor continuously transferring concentrated solar radiation to a bed of flowing particles. Rotary kilns are the chosen concept due to their technical maturity, easy control and simple design. The feasibility of a solar driven rotary kiln has already been proven at lab-scale, with the successful calcination of materials up to a scale of kg/h. The present work describes a large solar rotary kiln able to heat particles to over 1000 °C at flow rates of up to 20 kg/h. The thermal performance of the reactor was evaluated through an on-sun experimental campaign, performed in the high flux solar simulator at the DLR. During one test, 17 kg/h of particles were heated up to 990 °C, with a thermal efficiency of 45 %. An improvement of the efficiency can be obtained by optimizing the reactor. To do this, a numerical model was developed and its parameters fit to the measured data. Simulations were used to quantify the different heat loss mechanisms, and to explore ways of reducing them. The promising experimental results, together with the mprovements suggested by the model, provide the basis for an upcoming chemical campaign, where the calcination of CaCO3 and the effect of endothermic reactions on the temperature distribution will be investigated.

Item URL in elib:https://elib.dlr.de/117171/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental and Numerical analysis of a Solar Rotary Kiln for Continuous Treatment of Particle Material
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Tescari, StefaniaStefania.Tescari (at) dlr.deUNSPECIFIED
Moumin, GkiokchanGkiokchan.Moumin (at) dlr.deUNSPECIFIED
Bulfin, Brendanbrendan.bulfin (at) dlr.deUNSPECIFIED
de Oliveira, Lamarklamark.de-oliveira (at) dlr.deUNSPECIFIED
Schaefer, StefanS.Schaefer (at) dlr.deUNSPECIFIED
Overbeck, NicolasNicolas.Overbeck (at) dlr.deUNSPECIFIED
Willsch, ChristianChristian.Willsch (at) dlr.deUNSPECIFIED
Spenke, Carstencarsten.spenke (at) dlr.deUNSPECIFIED
Thelen, MartinMartin.Thelen (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.Roeb (at) dlr.deUNSPECIFIED
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124
Date:July 2018
Journal or Publication Title:AIP Conference Proceedings
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:2033
DOI :10.063/1.5067148
Status:Published
Keywords:concentrated solar Radiation, Rotary kiln, cement, particles, phosphate
Event Title:SolarPACES 2017
Event Location:Santiago, Chile
Event Type:international Conference
Event Dates:26.-29. Sep. 2017
Organizer:SolarPACES
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Solar Fuels
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solar Chemical Engineering
Institute of Solar Research > Großanlagen und solare Materialien
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:18 Dec 2017 12:00
Last Modified:14 Feb 2020 15:53

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