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Theoretical and experimental study on intelligent control of variable capacity refrigeration system.

[In Chinese. / En chinois.]

Author(s) : CHEN M., YANG Z., CHEN A., et al.

Type of article: Article

Summary

In order to improve the superheat control precision of the variable capacity refrigeration system,and establish the simple superheat control method,an intelligent superheat control strategy based on the traditional PID control strategy was proposed,with various influencing factors considered. The actual superheat control effect of the intelligent control strategy was checked in a cold store with constant temperature and humidity,and was compared with the control effect of thermostatic expansion valve. The experimental results show that:the intelligent control strategy gives a better performance such as faster dynamic response,lower overshoot,and shorter oscillation time compared with traditional PID control strategy. It is advantageous to superheat stability,if the compressor frequency changes as the interference factors are inputted in advance. The intelligent control strategy is better than the thermal expansion valve on the superheat control effect,and the cold store cooling time is shortened by 37.14%.

Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 30020475
  • Languages: Chinese
  • Source: Journal of Refrigeration - vol. 36 - n. 163
  • Publication date: 2015/06

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