Numerical investigation on the scale-up rules of a supercritical water fluidized bed reactor using the two-fluid model

The supercritical water fluidized bed reactor (SCWFBR) is a novel hydrogen production technique, so the understanding on its scale-up is limited. In this regard, the trial-and-error procedure is not an option for traditional experimental research because it is costly and high risk. To overcome these...

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Autores principales:	Hao Zhang, Yinghui Wu, Xizhong An, Aibing Yu
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	numerical simulation scale-up supercritical water fluidized bed reactor two-fluid model Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/de82911f1cd3427e814599e72ed1f82c
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spelling	oai:doaj.org-article:de82911f1cd3427e814599e72ed1f82c2021-11-26T11:19:48ZNumerical investigation on the scale-up rules of a supercritical water fluidized bed reactor using the two-fluid model1994-20601997-003X10.1080/19942060.2021.1995047https://doaj.org/article/de82911f1cd3427e814599e72ed1f82c2021-01-01T00:00:00Zhttp://dx.doi.org/10.1080/19942060.2021.1995047https://doaj.org/toc/1994-2060https://doaj.org/toc/1997-003XThe supercritical water fluidized bed reactor (SCWFBR) is a novel hydrogen production technique, so the understanding on its scale-up is limited. In this regard, the trial-and-error procedure is not an option for traditional experimental research because it is costly and high risk. To overcome these problems, numerical simulations were carried out in this study based on the two-fluid model (TFM) to examine the capability of different scale-up rules for the SCWFBR. The numerical model was first validated based on experimental results. Then, four different-sized SCWFBRs were designed, in which numerical simulations for both air–solid and supercritical water (SCW)–solid systems were conducted following different scale-up rules. The distributions of solid volume fraction, solid velocity and pressure in these reactors were fully investigated. Comparisons among the numerical results showed that keeping the Reynolds number, Froude number and dimensional inlet velocity constant is critical for the scale-up of both SCWFBRs and traditional gas–solid fluidized bed reactors (FBRs). Moreover, keeping the particle diameter constant is helpful in obtaining the similarity of the multiphase flow behavior. For the SCWFBR, but not for the traditional gas–solid FBR, a constant density ratio between solid and fluid should be kept during the scale-up. Finally, for the SCW–solid system with more active particle motions, the effect of the interparticle collisions should be considered in the scaling parameters at high Reynolds numbers.Hao ZhangYinghui WuXizhong AnAibing YuTaylor & Francis Grouparticlenumerical simulationscale-upsupercritical waterfluidized bed reactortwo-fluid modelEngineering (General). Civil engineering (General)TA1-2040ENEngineering Applications of Computational Fluid Mechanics, Vol 15, Iss 1, Pp 1830-1842 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	numerical simulation scale-up supercritical water fluidized bed reactor two-fluid model Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	numerical simulation scale-up supercritical water fluidized bed reactor two-fluid model Engineering (General). Civil engineering (General) TA1-2040 Hao Zhang Yinghui Wu Xizhong An Aibing Yu Numerical investigation on the scale-up rules of a supercritical water fluidized bed reactor using the two-fluid model
description	The supercritical water fluidized bed reactor (SCWFBR) is a novel hydrogen production technique, so the understanding on its scale-up is limited. In this regard, the trial-and-error procedure is not an option for traditional experimental research because it is costly and high risk. To overcome these problems, numerical simulations were carried out in this study based on the two-fluid model (TFM) to examine the capability of different scale-up rules for the SCWFBR. The numerical model was first validated based on experimental results. Then, four different-sized SCWFBRs were designed, in which numerical simulations for both air–solid and supercritical water (SCW)–solid systems were conducted following different scale-up rules. The distributions of solid volume fraction, solid velocity and pressure in these reactors were fully investigated. Comparisons among the numerical results showed that keeping the Reynolds number, Froude number and dimensional inlet velocity constant is critical for the scale-up of both SCWFBRs and traditional gas–solid fluidized bed reactors (FBRs). Moreover, keeping the particle diameter constant is helpful in obtaining the similarity of the multiphase flow behavior. For the SCWFBR, but not for the traditional gas–solid FBR, a constant density ratio between solid and fluid should be kept during the scale-up. Finally, for the SCW–solid system with more active particle motions, the effect of the interparticle collisions should be considered in the scaling parameters at high Reynolds numbers.
format	article
author	Hao Zhang Yinghui Wu Xizhong An Aibing Yu
author_facet	Hao Zhang Yinghui Wu Xizhong An Aibing Yu
author_sort	Hao Zhang
title	Numerical investigation on the scale-up rules of a supercritical water fluidized bed reactor using the two-fluid model
title_short	Numerical investigation on the scale-up rules of a supercritical water fluidized bed reactor using the two-fluid model
title_full	Numerical investigation on the scale-up rules of a supercritical water fluidized bed reactor using the two-fluid model
title_fullStr	Numerical investigation on the scale-up rules of a supercritical water fluidized bed reactor using the two-fluid model
title_full_unstemmed	Numerical investigation on the scale-up rules of a supercritical water fluidized bed reactor using the two-fluid model
title_sort	numerical investigation on the scale-up rules of a supercritical water fluidized bed reactor using the two-fluid model
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/de82911f1cd3427e814599e72ed1f82c
work_keys_str_mv	AT haozhang numericalinvestigationonthescaleuprulesofasupercriticalwaterfluidizedbedreactorusingthetwofluidmodel AT yinghuiwu numericalinvestigationonthescaleuprulesofasupercriticalwaterfluidizedbedreactorusingthetwofluidmodel AT xizhongan numericalinvestigationonthescaleuprulesofasupercriticalwaterfluidizedbedreactorusingthetwofluidmodel AT aibingyu numericalinvestigationonthescaleuprulesofasupercriticalwaterfluidizedbedreactorusingthetwofluidmodel
_version_	1718409503538413568

Numerical investigation on the scale-up rules of a supercritical water fluidized bed reactor using the two-fluid model

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