Design of structure and control system of semiconductor refrigeration box

doi:10.1016/j.cjche.2020.07.035

Abstract

Abstract: In order to create low temperature environment for the valve testing, a new type of semiconductor refrigeration box based on semiconductor refrigeration chip and programmable logic controller (PLC) control system is designed. The power of the semiconductor refrigeration chip is determined by calculating the heat dissipation characteristics of the semiconductor refrigeration box. Combining natural convection heat dissipation with forced air cooling, the heat sink of semiconductor refrigeration chip is designed. In the control strategy, switch control is combined with an intelligent control strategy. Adaptive single neuron optimization algorithm based on quadratic optimization is adopted to adjust and optimize the parameters of the proportional-integral-derivative (PID) controllers in real time. Taking into account the limited hardware capabilities of the PLC, the Jacobian information in parameter adjustment is redesigned into a simplified form of identification. The actual test results of refrigeration box show good control performance.

Key words: Semiconductor refrigeration, Structure design, PLC, Optimization algorithm

摘要： In order to create low temperature environment for the valve testing, a new type of semiconductor refrigeration box based on semiconductor refrigeration chip and programmable logic controller (PLC) control system is designed. The power of the semiconductor refrigeration chip is determined by calculating the heat dissipation characteristics of the semiconductor refrigeration box. Combining natural convection heat dissipation with forced air cooling, the heat sink of semiconductor refrigeration chip is designed. In the control strategy, switch control is combined with an intelligent control strategy. Adaptive single neuron optimization algorithm based on quadratic optimization is adopted to adjust and optimize the parameters of the proportional-integral-derivative (PID) controllers in real time. Taking into account the limited hardware capabilities of the PLC, the Jacobian information in parameter adjustment is redesigned into a simplified form of identification. The actual test results of refrigeration box show good control performance.

关键词: Semiconductor refrigeration, Structure design, PLC, Optimization algorithm

Meng Yu, Zhiyun Zou. Design of structure and control system of semiconductor refrigeration box[J]. Chinese Journal of Chemical Engineering, 2020, 28(11): 2792-2798.

Meng Yu, Zhiyun Zou. Design of structure and control system of semiconductor refrigeration box[J]. 中国化学工程学报, 2020, 28(11): 2792-2798.

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