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Multi-temperature target set value switching multi-parameter prediction control algorithm for process medium of circulating cooling water system

A predictive control algorithm and circulating cooling water technology, applied in the direction of prediction, calculation, data processing applications, etc., can solve problems such as applications without deep learning, achieve good generalization ability, save computing time and overhead, and improve accuracy

Active Publication Date: 2019-07-12
CHONGQING UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, in the related field of circulating cooling water system, there is no application of deep learning

Method used

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  • Multi-temperature target set value switching multi-parameter prediction control algorithm for process medium of circulating cooling water system
  • Multi-temperature target set value switching multi-parameter prediction control algorithm for process medium of circulating cooling water system
  • Multi-temperature target set value switching multi-parameter prediction control algorithm for process medium of circulating cooling water system

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Embodiment Construction

[0079] The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0080] In this embodiment, taking chemical plant A as an example, the energy-saving control of circulating cooling water is carried out. . From Figure 1-3 It can be seen that a circulating cooling water system process medium multi-temperature target set value switching multi-parameter predictive control algorithm, wherein the circulating cooling water system includes N' cooling towers, suction pools, and feed water pump units arranged along the circulating water path , outlet pipe group, M' heat exchangers in the production area and return pipe group; a cooling pool is provided in the cooling tower; in this embodiment, M' is a positive integer, and there are three heat exchanger groups: heat exchange in the synthesis area Heat exchanger group, heat exchanger group in urea area, heat exchanger grou...

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Abstract

The invention discloses a multi-temperature target set value switching multi-parameter predictive control algorithm for a process medium of a circulating cooling water system. The multi-parameter predictive control algorithm comprises the following specific steps: acquiring historical data of the circulating cooling water system; screening characteristic variables from the historical data, and dividing the characteristic variables into a training sample set and a test sample set after data processing; carrying out greedy unsupervised pre-training on the training sample set layer by layer to obtain a weight matrix W of an input layer and a hidden layer of deep neural network initialization, and a threshold matrix B of the input layer and the hidden layer; performing parameter fine tuning toobtain an initial process medium temperature prediction model; testing and evaluating again; and obtaining a cooling water supply and return pressure difference set value and a process medium temperature predicted value by obtaining current data. The method has the beneficial effects of accurate cooling and high precision, and can save energy to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of circulating cooling water in industrial production, in particular to a multi-parameter predictive control algorithm for switching between multi-temperature target setting values ​​of a process medium in a circulating cooling water system. Background technique [0002] In the industrial production process of chemical industry, electric power, metallurgy, etc., the system often generates a lot of heat due to friction, combustion, chemical reaction, etc., which will cause the temperature of equipment and system to rise, affect the quality of the process medium in the production area, and cause serious economic losses. The circulating cooling water system is a common engineering system for controlling the temperature of the process medium at the industrial production site. It uses the heat transfer medium to transfer the heat generated in the production process to the natural environment to achieve the purpose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q10/04G06K9/62
CPCG06Q10/04G06F30/20G06F18/214Y02P80/10
Inventor 左为恒宋璐璐李昌春
Owner CHONGQING UNIV
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