Analysis of slab heating characteristics in a reheating furnace

Wang, Jin; Liu, Yiwei; Sundén, Bengt; Yang, Ran; Baleta, Jakov; Vujanović, Milan

doi:10.1016/j.enconman.2017.04.005

Cited by 48 publications

(16 citation statements)

References 25 publications

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“…CO further oxidizes to CO 2 , and it is visible that CO 2 follows the flame shape as a final combustion product. The highest mass fraction of H 2 O is generated close to the fuel inlets due to the moisture evaporation process, while along the rotary kiln H 2 the flame shape as a combustion process product. While observing the mass fraction of O 2 through the domain, it is obvious that all oxygen from primary air is consumed in the combustion area, and the lack of oxygen follows the fluctuated flame shape.…”

Section: Resultsmentioning

confidence: 99%

“…The main disadvantage of coal as an energy resource lies in high CO 2 emissions with consequently harmful influence on the environment [1]. The thermal power generation sector along with industrial furnaces is the major energy consumer in China with the apparent problem of lower thermal efficiency which increases the generation of pollutant emissions [2].…”

Section: Introductionmentioning

confidence: 99%

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Improving Pulverized Coal and Biomass Co‐Combustion in a Cement Rotary Kiln by Computational Fluid Dynamics

et al. 2019

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The cement industry is one of the largest pollutant emitters. One way to cope with high pollutant emissions is to co‐combust biomass with pulverized coal. A mathematical model was developed, which is detailed enough to consider the complex physical and chemical behavior of the co‐combustion process but simple enough to perform simulations with a real geometry of cement rotary kiln within reasonable time. Numerical simulation with a 20‐% share of pulverized biomass of total fuel heating value was performed. An industrial rotary kiln geometry was simulated; temperature and velocity fields along with mass fractions of released volatiles and combustion products were analyzed. The model allows better insights in the co‐firing process with the main goal to reduce CO2 emissions by optimizing the combustion process inside the rotary kiln.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving Pulverized Coal and Biomass Co‐Combustion in a Cement Rotary Kiln by Computational Fluid Dynamics

et al. 2019

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“…An optimum response surface was calculated leading to a selection of the design parameters which will be subsequently used as a basis for the experimental analysis of the prototype. Wang et al [88] analyzed slab heating characteristics in a reheating furnace. For this process, the performance is strictly related to the combustion process and to the fluid dynamics.…”

Section: Advanced Combustion Techniques and Fuelsmentioning

confidence: 99%

Recent Advances in the Analysis of Sustainable Energy Systems

et al. 2018

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EU energy policy is more and more promoting a resilient, efficient and sustainable energy system. Several agreements have been signed in the last few months that set ambitious goals in terms of energy efficiency and emission reductions and to reduce the energy consumption in buildings. These actions are expected to fulfill the goals negotiated at the Paris Agreement in 2015. The successful development of this ambitious energy policy needs to be supported by scientific knowledge: a huge effort must be made in order to develop more efficient energy conversion technologies based both on renewables and fossil fuels. Similarly, researchers are also expected to work on the integration of conventional and novel systems, also taking into account the needs for the management of the novel energy systems in terms of energy storage and devices management. Therefore, a multi-disciplinary approach is required in order to achieve these goals. To ensure that the scientists belonging to the different disciplines are aware of the scientific progress in the other research areas, specific Conferences are periodically organized. One of the most popular conferences in this area is the Sustainable Development of Energy, Water and Environment Systems (SDEWES) Series Conference. The 12th Sustainable Development of Energy, Water and Environment Systems Conference was recently held in Dubrovnik, Croatia. The present Special Issue of Energies, specifically dedicated to the 12th SDEWES Conference, is focused on five main fields: energy policy and energy efficiency in smart energy systems, polygeneration and district heating, advanced combustion techniques and fuels, biomass and building efficiency.

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“…The similar approach for investigating radiative heat transfer impact was used in the numerical modelling of heat transfer in strong swirl flow of furnaces [15]. In [16], the authors performed analysis of thermal efficiency with emphasis on the radiative impact calculated by DOM in reheating furnace. AVL FIRE™ was already employed for steady calculations in biomass combustion in a rotary kiln in [17], where the similar framework is applied for the simulations in this work.…”

Section: Introductionmentioning

confidence: 99%

Assessment of radiative heat transfer impact on a temperature distribution inside a real industrial swirled furnace

et al. 2020

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Combustion systems will continue to share a portion in energy sectors along the current energy transition, and therefore the attention is still given to the further improvements of their energy efficiency. Modern research and development processes of combustion systems are improbable without the usage of predictive numerical tools such as Computational Fluid Dynamics (CFD). The radiative heat transfer in participating media is modelled in this work with Discrete Transfer Radiative Method (DTRM) and Discrete Ordinates Method (DOM) by finite volume discretisation, in order to predict heat transfer inside combustion chamber accurately. DTRM trace the rays in different directions from each face of the generated mesh. At the same time, DOM is described with the angle discretisation, where for each spatial angle the radiative transport equation needs to be solved. In combination with the steady combustion model in AVL FIRE? CFD code, both models are applied for computation of temperature distribution in a real oil-fired industrial furnace for which the experimental results are available. For calculation of the absorption coefficient in both models weighted sum of grey gasses model is used. The focus of this work is to estimate radiative heat transfer with DTRM and DOM models and to validate obtained results against experimental data and calculations without radiative heat transfer, where approximately 25 % higher temperatures are achieved. The validation results showed good agreement with the experimental data with a better prediction of the DOM model in the temperature trend near the furnace outlet. Both radiation modelling approaches show capability for the computation of radiative heat transfer in participating media on a complex validation case of the combustion process in oil-fired furnace.

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Analysis of slab heating characteristics in a reheating furnace

Cited by 48 publications

References 25 publications

Improving Pulverized Coal and Biomass Co‐Combustion in a Cement Rotary Kiln by Computational Fluid Dynamics

Improving Pulverized Coal and Biomass Co‐Combustion in a Cement Rotary Kiln by Computational Fluid Dynamics

Recent Advances in the Analysis of Sustainable Energy Systems

Assessment of radiative heat transfer impact on a temperature distribution inside a real industrial swirled furnace

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