Heat Transfer Model of Roller Quench in Strip Continuous Heat Treatment Process

2010 ◽  
Vol 160-162 ◽  
pp. 536-543
Author(s):  
Rui Feng Dou ◽  
Zhi Wen ◽  
Xun Liang Liu ◽  
Guo Feng Lou
Keyword(s):  
Heat Transfer ◽  
Heat Treatment ◽  
Correlation Function ◽  
Treatment Process ◽  
Transfer Model ◽  
Heat Treatment Process ◽  
Contact Heat ◽  
Contact Heat Transfer ◽  
Continuous Heat Treatment ◽  
Continuous Heat

Roller quench is a rapid cooling technique used in strip continuous heat-treatment process, which is one of the most important processes in producing cold-rolled strip steel. Heat transports by contact heat transfer in roller quench, for the complex characteristics of contact heat transfer, roller quench is very difficulty to simulate. In this paper a roller quench heat transfer model is build based on Fourier-Kirchhoff differential equations. A new correlation function of contact conductance is developed from statistical mechanics model results by least square method. This correlation function solves the heat transfer boundary condition in contact region between strip and roller. In this model the contact radiation is also considered. The roller quench model predicts the heat transfer characteristics of roller quench. The model is useful for the designing and controlling of the roller quench system.

Heat Transfer Model for Continuous Heat Treatment of Metallic Ribbon Wire

2016 ◽  
Vol 54 (5) ◽  
pp. 370-378 ◽  
Author(s):  
Woo Yang Jang ◽  
Hee-Soo Kim ◽  
Il-Cheon Lee ◽  
Dae Sung Kim ◽  
Hee Jin Jang
Keyword(s):  
Heat Transfer ◽  
Heat Treatment ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Continuous Heat Treatment ◽  
Continuous Heat

Heat Transfer Model in a Rotary Drum During the Fermentation Process

2020 ◽  
Vol 77 (1) ◽  
pp. 151-160
Author(s):  
Norazaliza Mohd Jamil ◽  
Aainaa Izyan Nafsun ◽  
Abdul Rahman Mohd Kasim
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Heat Transfer Coefficient ◽  
Fermentation Process ◽  
Transfer Model ◽  
Kutta Method ◽  
Contact Heat ◽  
Contact Heat Transfer ◽  
Runge Kutta Method ◽  
Rotary Drum

A new mathematical model describing heat transfer during the fermentation process in a rotary drum is proposed. The model includes representations of the kinetic reactions, the temperature of the solid bed, and physical structures within the rotary drum. The model is developed using five ordinary differential equations and was then solved using the Runge-Kutta method embedded in MATLAB software. A reasonable behaviour for the temperature profile to the fermentation process is achieved. The results show that the mass of the solid bed, contact heat transfer coefficient, and the wall temperature has a significant effect on the fermentation process in a rotary drum.

Convective Heat Transfer between Covered Kiln Wall and Material Bed

2013 ◽  
Vol 805-806 ◽  
pp. 492-495 ◽  
Author(s):  
Xiao Yan Yang ◽  
You Gang Xiao ◽  
Xian Ming Lei ◽  
Guo Xin Chen
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Convective Heat Transfer Coefficient ◽  
Transient Heat Conduction ◽  
Transfer Model ◽  
Contact Heat ◽  
Conduction Model ◽  
Contact Heat Transfer

According to kiln structure and material movement features, the transient heat conduction model of material bed and the contact heat transfer model at the interface of covered kiln wall and material bed are built. Considering their contribution to the convective heat transfer of material bed, the convective heat transfer coefficient between covered kiln wall and material bed is proposed, and its formula is obtained, with which the convective heat transfer between covered kiln wall and material bed can be calculated conveniently, so the heat transfer prediction within the rotary kiln can be done more easily.

Computer Simulation of Heat Treatment Process for 125MN Plunger

2008 ◽  
Vol 575-578 ◽  
pp. 1129-1133
Author(s):  
Chun Li Mo ◽  
Jin Ling ◽  
Yi Kun Luan ◽  
Cai Ping Shen
Keyword(s):  
Heat Transfer ◽  
Heat Treatment ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Real Time ◽  
High Speed ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Warm Up ◽  
Holding Period

The heavy 125MN Plunger is weight 140 ton, its heat treatment process include two part, one is heat and another is quenching in order to attain certain hardness on its surface and toughness on its body. Differential temperature heat process were made in well resistance furnace, the heat time include warm-up and holding period and high-speed increasing period. The total time is about 30-40 hours.The differential heat treatment process is an essential step in the production of heavy plunger, and it determines the hardness distribution on the sample surface. In this paper, a program to calculate real-time temperature during the heat treatment process was developed based on a great deal of experiments. Using this subroutine program the temperature field of hollow heavy plunger during differential heat treatment process was calculated. The result shows that the simulated temperature was agreed with the real temperature in the warm-up and holding period of the heat treatment process. In the calculation temperature field ,based on the convectional heat transfer coefficient and radiate heat transfer coefficient, the corrected heat transfer coefficient were induced to compose comprehensive heat transfer coefficient. The temperature predicted in warm-up and holding period were correct, the error was below 1%. At the high-speed increasing period, the time when the external temperature reach enacting was predict accurately. So the computer simulation can give real time prediction to decide parameters of the heat treatment process. The result also show that the program developed is sample and applied , it fit for predicting temperature at workshop real time and it is available to deal with complex process .

scholarly journals Simulation and validation of heat transfer during wood heat treatment process

2017 ◽  
Vol 7 ◽  
pp. 3806-3812 ◽  
Author(s):  
Jiali Zhang ◽  
Lijie Qu ◽  
Zhenyu Wang ◽  
Zijian Zhao ◽  
Zhengbin He ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Treatment ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Simulation And Validation

Inter-particle contact heat transfer model: an extension to soils at elevated temperatures

2005 ◽  
Vol 29 (2) ◽  
pp. 131-144 ◽  
Author(s):  
W. H. Leong ◽  
V. R. Tarnawski ◽  
F. Gori ◽  
G. D. Buchan ◽  
J. Sundberg
Keyword(s):  
Heat Transfer ◽  
Elevated Temperatures ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Contact Heat ◽  
Particle Contact ◽  
Contact Heat Transfer
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