Mathematical Modeling of Pulverized Coal Combustion in Entrained Flow Reactor PDF Download
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Author:
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Category :
Languages : en
Pages : 236
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 236
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Author: K. Takeda
Publisher:
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Category :
Languages : en
Pages :
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Author: Anil Goyal
Publisher:
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Category :
Languages : en
Pages : 594
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Author: L. Smoot
Publisher: Springer Science & Business Media
ISBN: 1475716966
Category : Science
Languages : en
Pages : 336
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Book Description
viii and approaches could be adapted to other coal conversion and combustion problems, we have not considered combustion or gasification in fluidized or fixed beds or in situ processes. In addition, we have not considered other fossil-fuel combustion problems associated with oil shale, tar sands, etc., even though many aspects of pulverized-coal combustion would relate to these problems. For the case of pulverized-coal models, we have attempted to provide a detailed description of the model foundations. Parts I and II of this book emphasize general principles for describing reacting, turbulent or laminar, multiphase systems. General conservation equations are developed and summarized. The basis for computing thermochemical equilibrium in complex, heterogeneous mixtures is presented, together with techniques for rapid computation and reference to required input data. Rate processes are then discussed, including pertinent aspects of turbulence, chemical kinetics, radiative heat transfer, and gas-particle convective-diffusive interactions. Much of Part II deals with parameters and coefficients for describing these complex rate processes. This part of the book provides recommended values of coefficients and parameters for treating complex reacting flows. Parts I and II may well be suitable for use in an advanced course in reacting flows, and have been written partly with that in mind. Part III deals with more specific aspects of pulverized-coal characteristics and rate processes. Following a general description of coal structure and constitution, coal pyrolysis and char oxidation processes are considered.
Author: K. M. Sprouse
Publisher:
ISBN:
Category :
Languages : en
Pages : 64
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Author: K. M. Sprouse
Publisher:
ISBN:
Category : Coal gasification
Languages : en
Pages : 64
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Author: Vivek V. Ranade
Publisher: CRC Press
ISBN: 1482215284
Category : Science
Languages : en
Pages : 292
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Book Description
Harness State-of-the-Art Computational Modeling Tools Computational Modeling of Pulverized Coal Fired Boilers successfully establishes the use of computational modeling as an effective means to simulate and enhance boiler performance. This text factors in how computational flow models can provide a framework for developing a greater understanding of the underlying processes in PC boilers. It also provides a detailed account of the methodology of computational modeling of pulverized coal boilers, as well as an apt approach to modeling complex processes occurring in PC boilers in a manageable way. Connects Modeling with Real-Life Applications Restricted to the combustion side of the boiler (the authors assume some prior background of reaction engineering and numerical techniques), the book describes the individual aspects of combustion and heat recovery sections of PC boilers that can be used to further improve the design methodologies, optimize boiler performance, and solve practical boiler-related problems. The book provides guidelines on implementing the material in commercial CFD solvers, summarizes key points, and presents relevant case studies. It can also be used to model larger boilers based on conventional, super-critical, or ultra-super critical technologies as well as based on oxy-fuel technologies. Consisting of six chapters, this functional text: Provides a general introduction Explains the overall approach and methodology Explores kinetics of coal pyrolysis (devolatilization) and combustion and methods of its evaluation Presents computational flow modeling approach to simulate pulverized coal fired boiler Covers modeling aspects from formulation of model equations to simulation methodology Determines typical results obtained with computational flow models Discusses the phenomenological models or reactor network models Includes practical applications of computational modeling Computational Modeling of Pulverized Coal Fired Boilers explores the potential of computational models for better engineering of pulverized coal boilers, providing an ideal resource for practicing engineers working in utility industries. It also benefits boiler design companies, industrial consultants, R & D laboratories, and engineering scientists/research students.
Author: Saurav Pokharel
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 0
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Coal is one of the major fossil fuels used for power generation. Coal consumption is decreasing on a global scale, but it is predicted to be in use for power generation until decades to come because of its affordability, reliability, and abundance. However, the carbon intensity of electricity from coal is very high (1000g CO2/KWh). The oxy-fuel combustion and co-firing of coal with biomass are promising technologies to decrease the carbon footprint of coal. This work aims to study the conversion of coal char and pine char in a quartz tube reactor numerically. The effect of fuel type, particle size, and the conversion environment(oxy-combustion and air-like environment) are investigated. Besides that, the performance of a simple SNOR (single nth order reaction) model in predicting the burnout and temperature history of solid fuel particles is also evaluated. The SNOR model is calibrated using the more sophisticated, network-based CBK/E and CBK/G models through the commercially available software “PC Coal Lab”. The SNOR model is verified against the CBK/E and CBK/G models and validated against the experimental data. Simulation results showed that the pine char burned hotter and faster as compared to the coal char which agrees with the experimental results. Both fuels burned with higher peak temperature in an air-like environment than in the oxy-combustion environment because of the greater heat capacity of CO2 and smaller diffusivity of O2 in the oxy-combustion environment. Overall, the simulation results were in good agreement with the experimental results in terms of char temperature history, burnout times, and char core diameter.
Author: Balbir S. Arora
Publisher:
ISBN:
Category :
Languages : en
Pages : 216
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Author: B. M. Visser
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 16
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Book Description
