One-point temperature control of reactive distillation: A thermodynamics-based assessment

The temperature control and the composition control for the production process was used to evaluated a method to control the quality of methyl ester production in a reactive distillation column. The optimum condition at steady state was selected as the base case condition for the control study by using Aspen Dynamic Simulation. In this work, two controller settings for PID controller of each control loop were based on the Zeigler-Nichol and the Tyreus-Luyben tuning formulae. The controllability and performance of both control structures were compared. The result shows that the control loop using the Ziegler-Nichols setting gave better control performance than the other using the Tyreus-Luyben setting. It also found that the control structure based on temperature control gives the same control performance as the other based on composition control, but less expensive and less complicated to implement.

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Research of Multi-Point Temperature Control Method in the Heating System of 3D Glass Hot Bending Machine

Journal of Physics Conference Series ◽

10.1088/1742-6596/1974/1/012002 ◽

2021 ◽

Vol 1974 (1) ◽

pp. 012002

Author(s):

Zhaobo Xu ◽

Pingfa Feng ◽

Huiting Zha ◽

Chao Xu ◽

Yuan Ma ◽

...

Keyword(s):

Temperature Control ◽

Control Method ◽

Heating System ◽

Point Temperature

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Analysis of perspective air preparation network designs in launch complex temperature control systems

Engineering Journal Science and Innovation ◽

10.18698/2308-6033-2021-9-2111 ◽

2021 ◽

Author(s):

V.V. Kozlov ◽

P.V. Krylov ◽

E.S. Piskun

Keyword(s):

Control Systems ◽

Temperature Control ◽

Dew Point ◽

Compressed Air ◽

Temperature Control System ◽

Point Temperature ◽

Dew Point Temperature ◽

Adsorbent Regeneration ◽

Complex Functions ◽

Complex Temperature

The purpose of the research is to perform a comparative analysis of compressed air preparation systems on the basis of moisture content. The article discusses conventional and perspective methods for drying compressed air using condensation, adsorption and membrane technologies. The article considers a temperature control system with the required dew point of minus 25°С at the exit under standard conditions, which corresponds to the dew point temperature plus 3 °С at a pressure of 1.0 MPa, or class 4 according to GOST R ISO 8573-1–2016. The main advantages of using advanced technological drying system designs are described, including the design of a modern drier with a rotary adsorber that can reduce the dew point temperature of compressed air to minus 25…30 °С at 1.0 MPa pressure without any losses on the adsorbent regeneration. This research is the first to analyze the applicability of modern adsorption and membrane modules to the launch complex functions. All the air drying designs were considered in this paper in relation to air temperature control systems based on air refrigerators using the I-d hygrometric chart for variable pressures.

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