Three-dimensional Mathematical Modeling and Designing of Hot Stove

Kimura, Yuri; Takatani, Kouji; Otsu, N

doi:10.2355/isijinternational.50.1040

Cited by 13 publications

(6 citation statements)

References 9 publications

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“…Since the flow in the hot blast stove adopted in this study did not have a Mach number greater than 0.3, the incompressible ideal gas model was implemented, while a fully compressible model requires high computational cost. In addition, it has been implemented for various studies on the flow that involves a combustion process [23][24][25]. With the assumptions, the continuity, linear momentum, and energy equations are described as follows:…”

Section: Numerical Modellingmentioning

confidence: 99%

Temperature and Thermal Stress Analysis of a Hot Blast Stove with an Internal Combustion Chamber

et al. 2023

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In this study, the temperature and thermal stress fields of an internal combustion hot blast stove were calculated and analysed. Turbulent, species transport, chemical reaction, radiation, and porous media models were implemented in a computational fluid dynamics model. Thermal boundary conditions on the structure of the hot blast stove were calculated based on the analytic adiabatic Y-plus method. A method to interpolate the thermal boundary conditions to a finite element mesh was developed, and the boundary conditions were mapped through the proposed method. In the on-gas period, the vortex was generated in the dome, and it made the variation of the temperature field in the checker chamber. The maximum temperature of the flue gas reached 1841 K in the on-gas period. In the on-blast period, the flow was considerably even compared to the on-gas period, and the average blast temperature reached 1345 K. The outer region of the checker chamber is shown to be continuously exposed to a higher temperature, which makes the region the main domain in managing the deterioration of the refractory linings. The shell temperature did not change during the operation due to the lower thermal diffusivity of the refractory linings, where the inner surface of the refractory had a maximum temperature change from 1441 K to 1659 K. The maximum temperature of the shell was 418.4 K at the conical region of the checker chamber side. The conical region had the higher maximum and middle principal thermal stresses due to the presence of a large temperature gradient around the conical region, where the largest maximum and middle principal stresses were 300.6 MPa and 192.0 MPa, respectively. The conical region was found to be a significant area of interest where it had a higher temperature and thermal stress.

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Section: Numerical Modellingmentioning

confidence: 99%

Temperature and Thermal Stress Analysis of a Hot Blast Stove with an Internal Combustion Chamber

et al. 2023

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“…21,22) The numerical simulations of the entire hot blast stove have made some progress. For instance, Kimura et al 23) studied the phenomenon of the heat and mass transfer in a hot blast stove with a three-dimensional mathematical model and designed the layout and operation conditions of lattice bricks for a new stove. Zeterholm et al 24) developed a mathematical model with the finite-difference approximation to evaluate the heat transfer performance of a hot blast stove and simulated the influence of a new oxygen fuel technology and the cycle time on a hot blast stove.…”

Section: Numerical Study Of Combustion and Air Supply Characteristicsmentioning

confidence: 99%

Numerical Study of Combustion and Air Supply Characteristics and Structural Optimization of Top Combustion Hot Blast Stoves

Zhang

Chen

et al. 2021

ISIJ Int.

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“…The aim of the present work is to explore a method to calculate the thermal efficiency of hot blast stoves through simulation results without relying on on-site test data, making it possible to evaluate the energy efficiency of the hot blast stove in operation and design. In recent years, numerical studies have been widely used to simulate the performance of specific components of hot blast stoves, such as burners and combustion chambers [14][15][16][17], regenerators [18][19][20], and even entire hot blast stoves [21][22][23][24][25][26][27]. These studies have mainly focused on the influence of the structure of hot blast stoves on the combustion, heat transfer, and turbulent processes.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on the Thermal Efficiency of Hot Blast Stoves

Zhang,

Tang,

Wang

2024

Processes

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Thermal efficiency is one of the important indices used to evaluate the operational energy efficiency of hot blast stoves. In this study, a method for calculating the thermal efficiency of hot blast stoves was developed based on simulation results. The working process of top combustion hot blast stoves was numerically simulated through the established 3D fluid flow heat transfer model. The system thermal efficiency of hot blast stoves was calculated according to the simulation data, referring to the Chinese national standard, “measurement and calculation method of the heat balance of blast furnace hot blast stove” (GB/T 32287-2015). In particular, a “segmented calculation and accumulate by time” method was proposed based on the air supply curve to more precisely calculate the heat carried away by the hot blast. The results indicate that when the burning air supply cycles increased from 120 to 240 min, the thermal efficiency showed a trend of first decreasing and then increasing, with the value ranging between 70.39% and 72.48%. The reason for the decrease in thermal efficiency at a burning cycle of 150 min is explained based on heat transfer theory combined with the structural characteristics of hot blast stoves. This study provides a convenient and effective method for calculating the thermal efficiency of hot blast stoves, which helps us to evaluate and improve the operating process of hot blast stoves.

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Three-dimensional Mathematical Modeling and Designing of Hot Stove

Cited by 13 publications

References 9 publications

Temperature and Thermal Stress Analysis of a Hot Blast Stove with an Internal Combustion Chamber

Temperature and Thermal Stress Analysis of a Hot Blast Stove with an Internal Combustion Chamber

Numerical Study of Combustion and Air Supply Characteristics and Structural Optimization of Top Combustion Hot Blast Stoves

Numerical Simulation Study on the Thermal Efficiency of Hot Blast Stoves

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