Modelling a Calcium-Looping Fluidised Bed Calcination Reactor with Solar-Driven Heat Flux

A new unidimensional computational model is developed to simulate a calcination reactor in a Calcium-looping process for thermochemical energy storage in concentrating solar power systems. The proposed reactor is an absorber tube exposed to concentrated solar radiation. This tube is also the riser o...

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Autores principales:	Mayra Alvarez Rivero, Diogo Rodrigues, Carla I.C. Pinheiro, João P Cardoso, L. Filipe Mendes
Formato:	article
Lenguaje:	EN
Publicado:	AIDIC Servizi S.r.l. 2021
Materias:	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
Acceso en línea:	https://doaj.org/article/c694ba5001a246779f139d2d829d975c
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spelling	oai:doaj.org-article:c694ba5001a246779f139d2d829d975c2021-11-15T21:47:34ZModelling a Calcium-Looping Fluidised Bed Calcination Reactor with Solar-Driven Heat Flux10.3303/CET21881452283-9216https://doaj.org/article/c694ba5001a246779f139d2d829d975c2021-11-01T00:00:00Zhttps://www.cetjournal.it/index.php/cet/article/view/11938https://doaj.org/toc/2283-9216A new unidimensional computational model is developed to simulate a calcination reactor in a Calcium-looping process for thermochemical energy storage in concentrating solar power systems. The proposed reactor is an absorber tube exposed to concentrated solar radiation. This tube is also the riser of a circulating fluidised bed where the calcination reaction takes place. The proposed heat transfer process models are based on the core-annulus model and the hydrodynamic model is a modified version of the Kunii-Levenspiel model. The model considers the change in the mass flow rate of species and the density change of the phases in the axial direction of the reactor, usually considered constant in the models found in the literature. A higher calcination efficiency, up to 8 p.p., is obtained for the studied reference case when assuming constant density and mass flow rate. Simulations were performed by imposing a solar-driven non-uniform heat flux distribution on the reactor wall. The results show that a 6 m height reactor allows achieving a calcination efficiency of 66% for the reference conditions used. A sensitivity analysis shows that the solids mass flow rate and the inlet bed temperature are the parameters that most affect the calcination process efficiency.Mayra Alvarez RiveroDiogo RodriguesCarla I.C. PinheiroJoão P CardosoL. Filipe MendesAIDIC Servizi S.r.l.articleChemical engineeringTP155-156Computer engineering. Computer hardwareTK7885-7895ENChemical Engineering Transactions, Vol 88 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
spellingShingle	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895 Mayra Alvarez Rivero Diogo Rodrigues Carla I.C. Pinheiro João P Cardoso L. Filipe Mendes Modelling a Calcium-Looping Fluidised Bed Calcination Reactor with Solar-Driven Heat Flux
description	A new unidimensional computational model is developed to simulate a calcination reactor in a Calcium-looping process for thermochemical energy storage in concentrating solar power systems. The proposed reactor is an absorber tube exposed to concentrated solar radiation. This tube is also the riser of a circulating fluidised bed where the calcination reaction takes place. The proposed heat transfer process models are based on the core-annulus model and the hydrodynamic model is a modified version of the Kunii-Levenspiel model. The model considers the change in the mass flow rate of species and the density change of the phases in the axial direction of the reactor, usually considered constant in the models found in the literature. A higher calcination efficiency, up to 8 p.p., is obtained for the studied reference case when assuming constant density and mass flow rate. Simulations were performed by imposing a solar-driven non-uniform heat flux distribution on the reactor wall. The results show that a 6 m height reactor allows achieving a calcination efficiency of 66% for the reference conditions used. A sensitivity analysis shows that the solids mass flow rate and the inlet bed temperature are the parameters that most affect the calcination process efficiency.
format	article
author	Mayra Alvarez Rivero Diogo Rodrigues Carla I.C. Pinheiro João P Cardoso L. Filipe Mendes
author_facet	Mayra Alvarez Rivero Diogo Rodrigues Carla I.C. Pinheiro João P Cardoso L. Filipe Mendes
author_sort	Mayra Alvarez Rivero
title	Modelling a Calcium-Looping Fluidised Bed Calcination Reactor with Solar-Driven Heat Flux
title_short	Modelling a Calcium-Looping Fluidised Bed Calcination Reactor with Solar-Driven Heat Flux
title_full	Modelling a Calcium-Looping Fluidised Bed Calcination Reactor with Solar-Driven Heat Flux
title_fullStr	Modelling a Calcium-Looping Fluidised Bed Calcination Reactor with Solar-Driven Heat Flux
title_full_unstemmed	Modelling a Calcium-Looping Fluidised Bed Calcination Reactor with Solar-Driven Heat Flux
title_sort	modelling a calcium-looping fluidised bed calcination reactor with solar-driven heat flux
publisher	AIDIC Servizi S.r.l.
publishDate	2021
url	https://doaj.org/article/c694ba5001a246779f139d2d829d975c
work_keys_str_mv	AT mayraalvarezrivero modellingacalciumloopingfluidisedbedcalcinationreactorwithsolardrivenheatflux AT diogorodrigues modellingacalciumloopingfluidisedbedcalcinationreactorwithsolardrivenheatflux AT carlaicpinheiro modellingacalciumloopingfluidisedbedcalcinationreactorwithsolardrivenheatflux AT joaopcardoso modellingacalciumloopingfluidisedbedcalcinationreactorwithsolardrivenheatflux AT lfilipemendes modellingacalciumloopingfluidisedbedcalcinationreactorwithsolardrivenheatflux
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Modelling a Calcium-Looping Fluidised Bed Calcination Reactor with Solar-Driven Heat Flux

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