Numerical approach to the flux distribution effect on a solar rotary kiln performance

Alessandro Gallo*, Elisa Alonso, Ricardo Pérez-Enciso, Edward Fuentealba, Carlos Pérez-Rábago

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

New investigations on solar thermochemical storage and other high temperature process are starting at the University of Antofagasta. A small cavity-type solar rotary reactor will be constructed to develop gas-solid reactions. For this reactor concept, is expected that the most part of the solid reactants will remain in the central sector of the drum. Thus, high temperatures at this area will benefit the process performance. Since the radiation profile feeding the solar reactor could have a significant effect on the temperature distribution, in this work it is presented a numerical model to analyze how the use of different concentrators affects the cavity walls temperature. First, a reference case was simulated with flat profile radiation. Then, a solar simulator composed of an elliptical mirror and a high power lamp and a multi-faceted concentrator were considered for the analysis. Their radiation profiles were obtained by ray tracing simulations and integrated in a CFD model that predicts the cavity temperature. It was found a relation between the flux profile and the temperature distribution. This way, higher temperatures were achieved at the back side of the cavity, where the most part of the radiation impinged. The most homogeneous temperature distribution was achieved for the multi-faceted concentrator case, in which lower differences between the back and the lateral wall were found.

Original languageEnglish
Title of host publicationSolarPACES 2015
Subtitle of host publicationInternational Conference on Concentrating Solar Power and Chemical Energy Systems
EditorsVikesh Rajpaul, Christoph Richter
PublisherAmerican Institute of Physics Inc.
Volume1734
ISBN (Electronic)9780735413863
DOIs
StatePublished - 31 May 2016
Externally publishedYes
Event21st International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2015 - Cape Town, South Africa
Duration: 13 Oct 201516 Oct 2015

Publication series

NameAIP Conference Proceedings
Volume1734
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference21st International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2015
Country/TerritorySouth Africa
CityCape Town
Period13/10/1516/10/15

Bibliographical note

Funding Information:
The authors acknowledge the financial support provided by the FONDECYT project number 3150026 of CONICYT (Chile), the Education Ministry of Chile Grant PMI ANT 1201, and CONICYT/FONDAP No 15110019 (Solar Energy Research Center SERC Chile). They also acknowledge the financial support provided by CONACyT (Mexico) through grant 123757.

Publisher Copyright:
© 2016 Author(s).

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