RT Journal Article
T1 A lab-scale rotary kiln for thermal treatment of particulate materials under high concentrated solar radiation: Experimental assessment and transient numerical modeling
A1 Gallo, Alessandro
A1 Alonso, Elisa
A1 Pérez Rábago, Carlos
A1 Fuentealba, Edward L.
A1 Roldán, María Isabel
AB Rotary kilns are worldwide used for industrial processes that involve thermal treatments of particulate materials.However, a great amount of fossil fuels is employed in such processes. As alternative, solar rotary kilns areconsidered for this application due to their versatility and potential to substitute traditional fossil-fuel drivendevices. In order to boost the development of this technology, efforts have to be focused on the control of theparticle temperature during the treatment. In this context, a lab-scale rotary kiln was built and tested using a 7-kWe high-flux solar simulator at University of Antofagasta. It was conceived to treat particulate materials ofdifferent nature and it is able to reach temperatures higher than 800 °C under different operation strategies.Silicon carbide was selected for initial tests because it is inert, endures high temperatures (up to 1600 °C) and ithas been proposed as thermal storage vector in several researches on concentrated solar power. In a first stage,the empty kiln was preheated up to about 800 °C, reaching a steady state in less than three hours and with apower of approximately 370 W entering the kiln cavity. Afterwards, 43 g of silicon carbide were introduced inthe furnace and the system was heated again up to a second steady state above 800 °C. In this stage, particlesshowed a fast increment of their temperature and exceeded 700 °C in less than three minutes after loading. Aone-dimensional transient numerical model was also developed to perform the thermal analysis of the kiln andthe estimation of both the particle temperature and the system efficiency. Numerical results showed goodagreement with experimental data and thermal losses could be quantified in detail. Therefore, the model wasalso used to predict the thermal behavior of a solar rotary kiln working in batch mode.
PB ELSEVIER BV
SN 0038-092X
YR 2019
FD 2019-08
LK https://hdl.handle.net/10016/35649
UL https://hdl.handle.net/10016/35649
LA eng
NO The authors acknowledge the financial support provided by theFONDECYT project number 3150026 of CONICYT (Chile), theEducation Ministry of Chile Grant PMI ANT 1201, as well as CONICYT/FONDAP/15110019 “Solar Energy Research Center” SERC-Chile.The authors also gratefully acknowledge the financial support received from the Sectorial Fund CONACYT-SENER-EnergySustainability, through grant 207450, Mexican Center for Innovation inSolar Energy (CeMIE-Sol), whithin strategic project P-10 “Solar Fuelsand Industrial Processes” (COSOLpi).Special thanks go to the students Lou Cardinale, Rodrigo Méndez,and Daniel Vidal who gave a precious contribution during the experimental trials at LaCoSA of University of Antofagasta.
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RD 1 sept. 2024