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Plate type heat exchanger model construction method based on fuzzy PID control

A technology of plate heat exchanger and construction method, which is applied to electric controllers, controllers with specific characteristics, etc., can solve the problems of poor PID control effect and difficulty in building plate heat exchanger models, and achieve precise control and improved control. quality effect

Active Publication Date: 2017-08-18
HENAN INST OF ENG
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, aiming at the problem that the plate heat exchanger model is difficult to build and its conventional PID control effect is poor, to provide a dynamic energy conservation modeling theory based on the plate heat exchanger Determine the model structure and combine with fuzzy theory to optimize the model of plate heat exchanger based on fuzzy PID control.

Method used

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  • Plate type heat exchanger model construction method based on fuzzy PID control
  • Plate type heat exchanger model construction method based on fuzzy PID control
  • Plate type heat exchanger model construction method based on fuzzy PID control

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[0045] Example: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 and Figure 8 , and the present invention is described in detail below in conjunction with accompanying drawing, and model is carried out simulation verification by Matlab software (referring to appendix image 3 ).

[0046] A method for building a plate heat exchanger model based on fuzzy PID control, characterized in that: the model structure is determined according to the dynamic energy conservation modeling theory of the plate heat exchanger, and the simplified model parameters and constraint conditions are simplified to obtain its simplified Model, and combined with fuzzy control theory to optimize the model, which specifically includes the following steps:

[0047] Step 1. According to the dynamic energy conservation modeling theory of the plate heat exchanger, the model structure is determined according to the overall heat transfer coefficient, and the plate heat e...

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Abstract

The invention discloses a plate type heat exchanger model construction method based on fuzzy PID control, aiming to solve the problems that a plate type heat exchanger model is difficult to construct, and the conventional PID control effect is bad. According to the unstable state energy balance, a plate type heat exchanger mathematics model is established and a plate type heat exchanger test system is built; according to the related data and the corresponding constraint conditions, simplified system transfer functions are obtained; and through the combination with the fuzzy theory, the characteristics of pure lagging and large inertia of the plate type heat exchanger can be better optimized. Therefore, the control quality of the plate type heat exchanger outlet temperature-control system can be effectively improved.

Description

Technical field: [0001] The invention relates to the field of heat exchange, in particular to a method for building a plate heat exchanger model based on fuzzy PID control. Background technique: [0002] Heat exchange equipment is a common equipment in chemical production. It makes the material outlet temperature meet the process production requirements through the heat exchange of cold and hot fluids. The plate heat exchanger, which is stacked by a series of corrugated metal sheets, is a new type of high-efficiency heat exchange equipment. It is widely used in industrial production fields such as chemical industry, pharmaceuticals, petroleum, energy, refrigeration and textiles. [0003] How to accurately control the outlet temperature of the plate heat exchanger is one of the important factors for the quality of the process product. Due to the many application fields of plate heat exchangers, corresponding dynamic mathematical models can be established under different assu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 黄全振陈素霞李小魁孙清原邓丽霞郭新军瓮嘉民付国定
Owner HENAN INST OF ENG
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