scholarly journals Heat Transfer within Direct Heating Integrated Moving Bed Torrefier by Method of Lines

2021 ◽  
Vol 11 (01) ◽  
pp. 1-13
Author(s):  
Bosikawa Mosi Fabrice ◽  
Sumuna Temo Vertomene ◽  
Mbuyi Katshiatshia Haddy
Keyword(s):  
Heat Transfer ◽  
Method Of Lines ◽  
Moving Bed ◽  
Direct Heating

Heat Transfer Modeling in a Counter-Current Moving-Bed Tubular Reactor for High-Temperature Thermochemical Energy Storage

2021 ◽  
Author(s):  
Wei Huang ◽  
Eric Million ◽  
Kelvin Randhir ◽  
Joerg Petrasch ◽  
James Klausner ◽  
...  
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Tubular Reactor ◽  
Operating Conditions ◽  
Transfer Model ◽  
Reactor Performance ◽  
Low Oxygen ◽  
Moving Bed ◽  
Oxidation Reactor ◽  
Counter Current

Abstract An axisymmetric model coupling counter-current gas-solid flow, heat transfer, and thermochemical redox reactions in a moving-bed tubular reactor was developed. The counter-current flow enhances convective heat transfer and a low oxygen partial pressure environment is maintained for thermal reduction within the reaction zone by using oxygen depleted inlet gas. A similar concept can be used for the oxidation reactor which releases high-temperature heat that can be used for power generation or as process heat. The heat transfer model was validated with published results for packed bed reactors. After validation, the model was applied to simulate the moving-bed reactor performance, through which the effects of the main geometric parameters and operating conditions were studied to provide guidance for lab-scale reactor fabrication and testing.

Properties of solid particles as heat transfer fluid in a gravity driven moving bed solar receiver

2019 ◽  
Vol 200 ◽  
pp. 110007 ◽  
Author(s):  
Fuliang Nie ◽  
Zhiying Cui ◽  
Fengwu Bai ◽  
Zhifeng Wang
Keyword(s):  
Heat Transfer ◽  
Solid Particles ◽  
Heat Transfer Fluid ◽  
Moving Bed ◽  
Gravity Driven ◽  
Solar Receiver

Lumped analysis criteria for heat transfer in a diluted co – current moving bed heat exchanger with isothermal walls

2020 ◽  
Vol 361 ◽  
pp. 1038-1059
Author(s):  
Sávio L. Bertoli ◽  
Juscelino de Almeida ◽  
Carolina K. de Souza ◽  
Aline Lovatel ◽  
Natan Padoin ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Moving Bed

scholarly journals Heat transfer simulation on drying proccsses of nonfired pelletscontaining combined water in the moving bed reactor.

1991 ◽  
Vol 31 (1) ◽  
pp. 24-31 ◽  
Author(s):  
Tomohiro Akiyama ◽  
Reijiro Takahashi ◽  
Jun-ichiro Yagi
Keyword(s):  
Heat Transfer ◽  
Moving Bed ◽  
Heat Transfer Simulation

scholarly journals Construction of a New Type of Coal Moisture Control Device Based on the Characteristic of Indirect Drying Process of Coking Coal

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4162
Author(s):  
Ming Yan ◽  
Xinnan Song ◽  
Jin Tian ◽  
Xuebin Lv ◽  
Ze Zhang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Mass Transfer Rate ◽  
Bottom Layer ◽  
High Heat ◽  
Control Device ◽  
Condensation Process ◽  
Moving Bed ◽  
Moisture Control ◽  
New Type ◽  
Drying Efficiency

This paper presents an in-depth study on the indirect drying characteristics and interface renewal. By comparing the drying rate curve, it is found that shortening the surface drying stage, which contains a repeated evaporation-diffusion-condensation process of moisture, is the key to improve the total drying efficiency. By stirring the coal and realizing the interface renewal between the bottom layer and the surface layer, the drying efficiency reached seven times than that of static indirect drying. Based on indirect heat transfer with high heat and mass transfer rate, a new type of indirect heat transfer moving bed coal moisture control device is designed. At the same time, Fluent fluid mechanics software is used for mathematical modeling and simulation experiments. It is proved that the designed moving bed coal moisture control device has a good application prospect in coal pre-drying technology.

Heat Transfer in a Rotary Reactor, Direct Heating

2008 ◽  
pp. 69-91
Author(s):  
Daizo Kunii ◽  
Tatsu Chisaki
Keyword(s):  
Heat Transfer ◽  
Direct Heating ◽  
Rotary Reactor

Semi-Analytical Solution of a Non-Linear Heat Transfer Model for a Tubular Co-Current Moving-Bed Reactor with a First-Order Chemical Reaction in the Solid Phase

2021 ◽  
Author(s):  
Lucas Ivan de Souza Vereza Medeiros ◽  
Sávio Leandro Bertoli ◽  
Marcel Jefferson Gonçalves ◽  
Tuany Gabriela Hoffmann ◽  
Betina Louise Angioletti ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Chemical Reaction ◽  
Solid Phase ◽  
Transfer Model ◽  
Moving Bed ◽  
First Order ◽  
Order Chemical Reaction ◽  
Non Linear ◽  
Linear Problems ◽  
First Order Chemical Reaction

Abstract The development of mathematical models plays a fundamental role in the design, optimization and control of processes. Regarding heat transfer in moving bed reactors, the chemical reaction implies in the inclusion of a non-homogeneous and non-linear term in model equations, making the analytical integration a very difficult task. Up to date, there is not an analytic and/or a semi-analytic solution to a heat transfer model of a moving bed reactor (MBR) with isothermal walls to distributed parameter in the solid phase. Therefore, starting from analytical solutions of the associated homogeneous (linear) problems and through the spectral expansion of the non-homogeneous vector, this work presents strategies for determining semi-analytical solutions of non-homogeneous and non-linear problems. A MBR with a first-order chemical reaction in the solid phase - kaolinite dehydroxylation in the kaolinite flash calcination process - is selected as the case study; however, the strategies can easily be applied to other non-linear models. Results for conversion, and fluid and particle temperatures, are given for different parameter values. The solutions perform stable, fast and accurate. When compared with a hybrid Finite Difference and Finite Analytic (FD\&FA) numerical method, the solution showed a very good agreement.

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