CFD Analysis of Batch-Type Reheating Furnace With Regeneratve Burners

2008 ◽  
Author(s):  
Bin Wu ◽  
Tom Roesel ◽  
Andrew M. Arnold ◽  
Zhaojiang Xu ◽  
Eugene Arnold ◽  
...  
Keyword(s):  
Product Quality ◽  
Three Dimensional ◽  
Control Process ◽  
Flow Characteristics ◽  
Steel Production ◽  
Value Added ◽  
Heating Process ◽  
Cfd Analysis ◽  
Reheating Furnace ◽  
Quality Control Process

A reheating furnace is a critical component in value-added steel production. These furnaces can have a significant impact on product quality and total cost. Due to the higher efficiency of regenerative burners, a growing number of reheating furnaces are using this technology. To better understand the regenerative burner operation, a Computational Fluid Dynamics (CFD) analysis has been conducted to examine the transient and three dimensional flow characteristics in the No.3 reheating furnace at ArcelorMittal Steelton. Simulation results with traditional burners and regenerative burners have been analyzed to understand the effect of retrofitting a furnace with these more modern burners. The temperature distribution on the billets has also been monitored throughout the simulated heating process providing insight into the optimization of billet residence time and improvement of the product quality control process.

CFD Analysis of Batch-Type Reheating Furnace for Improved Heating Performance

2008 ◽  
Author(s):  
Bin Wu ◽  
Tom Roesel ◽  
Andrew M. Arnold ◽  
Zhaojiang Xu ◽  
Eugene Arnold ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Production Capacity ◽  
Steel Production ◽  
Value Added ◽  
Furnace Operation ◽  
Temperature Fields ◽  
Cfd Analysis ◽  
Reheating Furnace ◽  
Batch Type ◽  
Fuel Flow

A reheating furnace is a critical component in value-added steel production. These furnaces can have a significant impact on both product quality and total cost. In order to obtain a better understanding of the furnace operation which influences the temperature distribution, a Computational Fluid Dynamics (CFD) analysis has been conducted to examine the transient and three dimensional temperature fields in a prototype of the number three reheating furnace located at ArcelorMittal. Also, a series of simulations have been conducted to maximize the furnace performance. These parametric studies include different burner designs, fuel flow rates, and combustion air supplies to optimize the heating capacity of the furnace. The comparison of the simulation results assists in understanding the effective factors which are critical to the improvement of the furnace’s production capacity, thus providing insight into furnace optimization.

CFD Analysis of Batch-Type Reheating Furnace

2007 ◽  
Author(s):  
Bin Wu ◽  
Andrew M. Arnold ◽  
Eugene Arnold ◽  
George Downey ◽  
Chenn Q. Zhou
Keyword(s):  
Three Dimensional ◽  
Furnace Operation ◽  
Operating Conditions ◽  
Temperature Fields ◽  
Cfd Analysis ◽  
Reheating Furnace ◽  
Batch Type ◽  
Billet Quality ◽  
Actual Operating ◽  
Computational Fluid Dynamics Cfd

In the steelmaking industry, reheating furnaces are used to heat the billets or blooms to the rolling temperature; the uniformity of the temperature in the furnace determines billet quality. In order to obtain a better understanding of the furnace operation, which influences the temperature distribution; Computational Fluid Dynamics (CFD) analysis is conducted to examine the transient and three dimensional temperature fields in a reheating furnace using the commercial software Fluent®. A number of actual operating conditions, based on the ArcelorMittal Steelton No.3 reheating furnace, are computed. The numerical results are used to optimize the operating parameters and thus help to improve the steel quality.

CFD Analysis of Composite Axial Water Turbine

2010 ◽  
Author(s):  
Jifeng Wang ◽  
Norbert Mu¨ller
Keyword(s):  
Design Method ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Cfd Analysis ◽  
Computational Investigation ◽  
Rotating Speed ◽  
Fundamental Understanding ◽  
Water Turbine ◽  
Water Turbines

This paper presents computational investigation of the flow in composite material axial water turbines using Finite Volume based commercial CFD package namely Fluent. Based on three dimensional numerical flow analysis and fluid-structure interaction, the flow characteristics of water turbines including nozzle, impeller and diffuser are predicted. Two particulare cases are studied and compared. The extract power of water turbine in different rotating speed and water inlet velocity are analyzed. The calculated results will provide a fundamental understanding of the impeller as water turbine, and this design method is used to shorten the design period and improve the water turbine’s performance.

Modeling of Steel Slab Reheating Process in a Walking Beam Reheating Furnace

2016 ◽  
Author(s):  
Guangwu Tang ◽  
Arturo Saavedra ◽  
Tyamo Okosun ◽  
Bin Wu ◽  
Chenn Q. Zhou ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Three Dimensional ◽  
Heat Transfer Model ◽  
Furnace Operation ◽  
Production Data ◽  
Heating Process ◽  
Transfer Model ◽  
Transfer Coefficients ◽  
Reheating Furnace ◽  
Reheating Process

Slab reheating is a very important step in steel product manufacturing. A small improvement in reheating efficiency can translate into big savings to steel mills in terms of fuel consumption and productivity. Computational fluid dynamics (CFD) has been employed in conducting numerical simulations of the slab reheating furnace operation. However, a full industrial scale three-dimensional (3D) simulation of a slab reheating furnace, while comprehensive, is not an efficient way to conduct broad studies of the slab heating process. In this paper, a comprehensive two-dimensional (2D) numerical heat transfer model for slab reheating in a walking beam furnace was developed using the finite difference method. The 2D heat transfer model utilizes the heat transfer coefficients derived from a 3D reheating furnace CFD model which was validated by using mill instrumented slab trials. The 2D heat transfer model is capable of predicting slab temperature evolutions during the reheating processes based on the real time furnace conditions and steel physical properties. The 2D model was validated by using mill instrumented slab trials and production data. Good agreement between the model predictions and production data was obtained.

scholarly journals ANALISIS PENGENDALIAN KUALITAS PRODUK KORAN PADA PT. RADAR SULTENG MEMBANGUN DI KOTA PALU

2020 ◽  
Vol 5 (3) ◽  
pp. 287-297
Author(s):  
Zahro’in Nitafiyah ◽  
Saharuddin Kaseng ◽  
Syamsuddin Syamsuddin
Keyword(s):  
Quality Control ◽  
Product Quality ◽  
Control Chart ◽  
Control Process ◽  
Control Analysis ◽  
Statistical Tools ◽  
Product Quality Control ◽  
Quality Control Analysis ◽  
Quality Control Process ◽  
Quality Control Chart

This study aims to determine how the implementation of quality control using statistical aids is useful in an effort to control the level of product damage in the company. Quality control analysis is carried out using statistical tools in the form of check sheets and p control maps. Check sheets are used to present data to make it easier to understand data for the purposes of subsequent analysis. P control maps are used to monitor damaged products whether they are still in control or not. The results of the P control chart analysis show that the process has been carried out well. This can be seen in the final product quality control chart with the final number of CL values showing 0.0049, UCL 0.0091, LCL 0.0007 with a proportion of 0.0050 defects which means that the quality control process is within controlled limits because the value of the defect proportion is smaller than the UCL value. Penelitian ini bertujuan untuk mengetahui bagaimana pelaksanaan pengendalian kualitas menggunakan alat bantu statistik bermanfaat dalam upaya mengendalikan tingkat kerusakan produk di perusahaan. Analisis pengendalian kualitas dilakukan menggunakan alat bantu statistik berupa check sheet dan peta kendali p. Check sheet digunakan untuk menyajikan data agar memudahkan dalam memahami data untuk keperluan analisis selanjutnya. Peta kendali p digunakan untuk memonitor produk yang rusak apakah masih berada dalam kendali atau tidak. Hasil analisis peta kendali p menunjukkan bahwa proses sudah terlaksana dengan baik. Hal ini dapat dilihat pada grafik kendali kualitas produk akhir dengan jumlah akhir nilai CL menunjukkan 0.0049, UCL 0.0091, LCL 0.0007 dengan proporsi cacat 0.0050 yang berarti proses pengendalian kualitas berada dalam batas terkendali karena nilai proporsi cacat lebih kecil dari nilai UCL.

Three Dimensional Analysis of the Slab Reheating Furnace

2014 ◽  
Vol 610 ◽  
pp. 1029-1033 ◽  
Author(s):  
Jiin Yuh Jang ◽  
Chien Nan Lin ◽  
Cheng Yuan Lee ◽  
Chao Hua Wang
Keyword(s):  
Heat Transfer ◽  
Radiation Heat Transfer ◽  
Three Dimensional ◽  
Coke Oven ◽  
Heating Process ◽  
Coke Oven Gas ◽  
Radiation Heat ◽  
Reheating Furnace ◽  
Heating Efficiency ◽  
Total Input

This paper studies the chemical combustion reaction of coke oven gas coupled with radiation heat transfer in the slab reheating furnace. Three dimensional temperature distributions of the produced gases and slabs in the combustion furnace are investigates numerically. Numerical results reveal that the radiation heat transfer dominates the heating process in the combustion furnace; it is around 95% of total input heating energy. The heating efficiency is examined for the sake of energy saving in the combustion furnace.

CFD Analysis of Turbulent Flow in a Nuclear Fuel Bundle With Mixing Vane

2002 ◽  
Author(s):  
Wang Kee In ◽  
Dong Seok Oh ◽  
Tae Hyun Chun
Keyword(s):  
Turbulent Flow ◽  
Nuclear Fuel ◽  
Cfd Simulation ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Cfd Analysis ◽  
Mean Flow ◽  
Cfd Models ◽  
Fuel Bundle ◽  
Rod Array

A computational fluid dynamics (CFD) analysis was performed to investigate the coolant mixing in a nuclear fuel bundle that is promoted by the mixing vane on the grid spacer. Single and multiple subchannels of one grid span of the fuel bundle were modeled to simulate a 5×5 rod array experiment with the mixing vane. The three-dimensional CFD models were generated by a structured multi-block method. The standard k-ε turbulence model was used in the current CFD simulation since it is practically useful and converges well for the complex turbulent flow in a nuclear fuel bundle. The CFD predictions of axial and lateral mean flow velocities showed a somewhat large difference from the experimental results near the spacer but represented the overall characteristics of coolant mixing well in a nuclear fuel bundle with the mixing vane. Comparison of single and multiple subchannel predictions shows good agreement of the flow characteristics in the central subchannel of the rod array. The simulation of multiple subchannels shows a slightly off-centered swirl in the peripheral subchannels due to the external wall of the rod array. It also shows no significant swirl and crossflow in the wall subchannels and the corner subchannels.

Thermal Runaway and its Control in Microwave Heated Ceramics

1992 ◽  
Vol 269 ◽  
Author(s):  
Gregory A. Kriegsmann
Keyword(s):  
Microwave Power ◽  
Initial Conditions ◽  
Physical Phenomenon ◽  
Three Dimensional ◽  
Control Process ◽  
Independent Solution ◽  
Cylindrical Sample ◽  
Thermal Runaway ◽  
Amplitude Equation ◽  
Heating Process

ABSTRACTThe heating of a ceramic slab under TEM illumination is modeled and analyzed in the small Biot number regime. The temperature distribution is almost spatially uniform in this limit and its evolution in time is governed by a first order nonlinear amplitude equation. This equation admits a time independent solution which is a multivalued function of the microwave power. The dynamics of the heating process are deduced, from the amplitude equation and the multivalued response, and are dependent upon the microwave power and initial conditions. The results of this analysis give a plausible explanation of certain difficulties arising in sintering experiments, such as thermal runaway. A simple control process is presented and analyzed which mitigates against these deleterious effects. Abbreviated parameter studies are performed showing trends in the controlled heating process.A quasi-three-dimensional problem modeling the heating process of a thin cylindrical sample in a waveguide applicator is also presented. For certain excitations the physical phenomenon deduced from this model and the required control process are the same as those obtained for the slab. For other excitations there is a strong spatial structure along the axis of the sample. For a certain choice of parameters the middle portion of the sample is at an elevated temperature while the remaining portion is at a much lower temperature. This phenomenon may be useful in joining applications.

scholarly journals CFD analysis of helical nozzles effects on the energy separation in a vortex tube

2012 ◽  
Vol 16 (1) ◽  
pp. 151-166 ◽  
Author(s):  
Nader Pourmahmoud ◽  
Hassan Zadeh ◽  
Omid Moutaby ◽  
Abdolreza Bramo
Keyword(s):  
Vortex Tube ◽  
Numerical Models ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Vortex Chamber ◽  
Energy Separation ◽  
Outlet Temperature ◽  
Computational Domain ◽  
Cfd Analysis ◽  
Swirl Velocity

In this article computational fluid dynamics (CFD) analysis of a three-dimensional steady state compressible and turbulent flow has been carried out through a vortex tube. The numerical models use the k-? turbulence model to simulate an axisymmetric computational domain along with periodic boundary conditions. The present research has focused on the energy separation and flow field behavior of a vortex tube by utilizing both straight and helical nozzles. Three kinds of nozzles set include of 3 and 6 straight and 3 helical nozzles have been investigated and their principal effects as cold temperature difference was compared. The studied vortex tubes dimensions are kept the same for all models. The numerical values of hot and cold outlet temperature differences indicate the considerable operating role of helical nozzles, even a few numbers of that in comparing with straight nozzles. The results showed that this type of nozzles causes to form higher swirl velocity in the vortex chamber than the straight one. To be presented numerical results in this paper are validated by both available experimental data and flow characteristics such as stagnation point situation and the location of maximum wall temperature as two important facts. These comparisons showed reasonable agreement.

scholarly journals CONCEPTUAL MODELS OF THE QUALITY CONTROL PROCESS

2000 ◽  
Vol 5 (1) ◽  
pp. 143-152
Author(s):  
A. Ribikauskas ◽  
O. Vasilecas ◽  
A. Čaplinskas
Keyword(s):  
Quality Control ◽  
Product Quality ◽  
Conceptual Models ◽  
Logic Program ◽  
Control Process ◽  
Quality Inspection ◽  
Knowledge Based ◽  
Quality Control Process ◽  
Inspection Process ◽  
Quality Category

This paper discusses issues of conceptual modelling of the product quality control process. Special attention is paid to the quality inspection. This process can be considered as a kind of product sorting the aim of which is to identify the product quality category. It is supposed that the sorting can be done according to prescriptive norms and standards. The paper considers the specific features of knowledge described by those norms and standards, discusses how to represent this knowledge by a logic program, and proposes a knowledge‐based architecture of the software system that acts as a part of the quality system and implements the product quality inspection process.

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