A Refrigeration System Temperature Optimal Control Method Based on Fruit Fly Algorithm

A refrigeration system, fruit fly algorithm technology, applied in refrigeration and liquefaction, controllers with specific characteristics, refrigerators, etc., can solve problems such as high hardware configuration requirements and unfavorable engineering implementation.

Active Publication Date: 2020-10-27
SOUTHEAST UNIV
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Problems solved by technology

However, these methods require a large number of calculations and have high requirements for hardware configuration, which is not conducive to the realization of the project

Method used

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  • A Refrigeration System Temperature Optimal Control Method Based on Fruit Fly Algorithm
  • A Refrigeration System Temperature Optimal Control Method Based on Fruit Fly Algorithm
  • A Refrigeration System Temperature Optimal Control Method Based on Fruit Fly Algorithm

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Embodiment Construction

[0066] The technical solution of the present invention will be further introduced below in combination with specific implementation methods and accompanying drawings.

[0067] This specific embodiment discloses a temperature optimization control method of a refrigeration system based on the fruit fly algorithm, including the following steps:

[0068] S1: Establish a mathematical model of the refrigeration system; the refrigeration system such as figure 1 shown;

[0069] S2: Carry out a step response experiment on the mathematical model of the refrigeration system obtained in step S1, and use the least square method to identify the transfer function of the obtained response curve to obtain a linearized model of the refrigeration system, such as image 3 shown;

[0070] S3: Perform relative gain matrix analysis on the linearized model obtained in step S2 to obtain the valve opening A v The outlet temperature T of the secondary flux to the evaporator e,sec,out The transfer fu...

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Abstract

The invention discloses a temperature optimization control method of a refrigeration system based on the fruit fly algorithm, comprising the following steps: S1: establishing a mathematical model of the refrigeration system; S2: performing a step response experiment on the mathematical model of the refrigeration system obtained in step S1, And use the least squares method to identify the transfer function of the obtained response curve to obtain the linearization model of the refrigeration system; S3: conduct relative gain matrix analysis on the linearization model obtained in step S2, and obtain the valve opening A v The outlet temperature T of the secondary flux to the evaporator e,sec,out The transfer function G11 of the compressor, the outlet temperature T from the compressor speed N to the secondary flux of the evaporator e,sec,out The transfer function G12, from the valve opening A v to evaporator superheat T sh The transfer function G21 and from the compressor speed N to the evaporator superheat T sh The transfer function G22 of the refrigeration system and the relationship between various variables in the refrigeration system, and design the first PID controller and the second PID controller; S4: use the fruit fly algorithm to optimize the control parameters of the two PID controllers.

Description

technical field [0001] The invention relates to the field of refrigeration system control, in particular to a method for optimally controlling the temperature of a refrigeration system based on a fruit fly algorithm. Background technique [0002] Today, refrigeration systems play a vital role in the daily life of human beings. Controlling temperature through refrigeration technology touches various fields such as human comfort, food storage, food transportation and environment. However, when the refrigeration system is working, it needs to consume electric energy to move heat from the inside of the system to the outside of the system, and this process requires high energy consumption. At the same time, with the development of society and the process of urbanization, refrigeration technology has been applied to all parts of the world, which has accelerated the growth of carbon emissions around the world. According to surveys, nearly 30% of the world's energy consumption is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02F25B41/06G05B11/42G06N3/00F25B41/31
CPCF25B49/022G06N3/006G05B11/42F25B2500/18F25B41/31
Inventor 孙立秦宇枭金宇晖
Owner SOUTHEAST UNIV
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