Research on the Temperature Uniformity of Vacuum Furnace and Size Optimization of Working Zone

Xiu, Haohua; Xu, Tao; Jian, Tang; Fan, Lulu; Xu, Tao; Yoshino, Tatsuo

doi:10.1109/icicta.2015.200

Cited by 4 publications

(1 citation statement)

References 4 publications

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“…As a typical manufacture equipment for industrial sintering products, the multi-temperature zone electrical heating furnaces and their precise control are extremely important in engineering practice. The uniformity and consistency of temperature field distribution within the multi-temperature zone systems (MTZSs) are two key factors characterizing the control accuracy of MTZSs, and thus, the simultaneous stable temperature uniformity and consistency control are two challenging objectives to be achieved to guarantee both product quality and production efficiency (Haohua et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous stable control of temperature field distribution uniformity and consistency for multi-temperature zone systems

Sang

Yuan

et al. 2021

Transactions of the Institute of Measurement and Control

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As a key factor characterizing the control accuracy of multi-temperature zone systems (MTZSs), the stable control of temperature field distribution uniformity and consistency is of critical importance for MTZSs, and it largely determines the product quality and production efficiency. Due to the complicated multiple input and output properties, as well as the various external variations in practice, however, it is extremely difficult to monitor the temperature field distribution in production process. To address the uniform and consistent temperature field distribution problem in MTZSs, a multi-variable dynamic matrix control (DMC)-based predictive control mechanism is proposed in this paper. Specifically, we first establish a finite element-based heat transfer model to analyse heat transfer within the multi-temperature zone, and then propose a multi-variable DMC-based decoupling design method to decompose the entire system into multiple subsystems with single-input single-output for temperature uniformity distribution control in MTZS. By utilizing the ANSYS tools to analyse the transient field temperatures, we obtain both time and space distribution characteristics of the transient temperature field with the proposed control method, and also compare such results with those obtained using the PID control method. Finally, we apply the proposed multi-variable DMC control mechanism onto a multi-temperature sintering furnace of a practical industrial product line for verification. Results show that, with the proposed control mechanism adopted, the difference between the highest and lowest temperature of any workpiece could be maintained within 5°C in the heat rising up period, which convincingly verifies the effectiveness of the proposed predictive control algorithm in different cases.

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Section: Introductionmentioning

confidence: 99%

Simultaneous stable control of temperature field distribution uniformity and consistency for multi-temperature zone systems

Sang

Yuan

et al. 2021

Transactions of the Institute of Measurement and Control

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Uniformizing the temperature of turbine blades during the heat treatment process from the perspective of radiation energy distribution

Liu,

Bu,

et al. 2024

Applied Thermal Engineering

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Thermal Analysis of Vacuum Resistance Furnace

et al. 2019

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The current paper describes the effect of insulation thickness in a vacuum resistance furnace. An existing furnace was optimized for insulation thickness using analytical and numerical studies. Furnace heating efficiency was improved up to 64% by controlling the heat flow at the insulation face. The numerical results were validated experimentally and vice versa. The numerical results predicted a decrease in heat flow of 70%, while the experimentally achieved value was 64%. The percentage difference in numerical and experimental results was calculated to be 1.5–5% maximum in temperature value. The effect of mesh finesse was evaluated for thermal analysis and it was concluded that a very little difference of 5 °C occurs when element size is reduced 5 times. The study using numerical methods will help in designing better and upgraded furnaces with greater energy savings. Also, the application of numerical methods is proposed as an effective design and performance prediction tool during manufacturing and operational activities of vacuum furnaces, respectively.

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Research on the Temperature Uniformity of Vacuum Furnace and Size Optimization of Working Zone

Cited by 4 publications

References 4 publications

Simultaneous stable control of temperature field distribution uniformity and consistency for multi-temperature zone systems

Simultaneous stable control of temperature field distribution uniformity and consistency for multi-temperature zone systems

Uniformizing the temperature of turbine blades during the heat treatment process from the perspective of radiation energy distribution

Thermal Analysis of Vacuum Resistance Furnace

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