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.
|Title of host publication||SolarPACES 2015|
|Subtitle of host publication||International Conference on Concentrating Solar Power and Chemical Energy Systems|
|Editors||Vikesh Rajpaul, Christoph Richter|
|Publisher||American Institute of Physics Inc.|
|State||Published - 31 May 2016|
|Event||21st International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2015 - Cape Town, South Africa|
Duration: 13 Oct 2015 → 16 Oct 2015
|Name||AIP Conference Proceedings|
|Conference||21st International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2015|
|Period||13/10/15 → 16/10/15|
Bibliographical noteFunding 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.
© 2016 Author(s).