Share

IIR document

Identification and digital control of a household refrigeration system with a variable speed compressor.

Author(s) : PIEDRAHITA-VELASQUEZ C. A., CIRO-VELASQUEZ H. J., GOMEZ-BOTERO M. A.

Type of article: Article, IJR article

Summary

This paper presents an autoregressive–moving-average model with exogenous inputs (ARMAX model) and a digital controller for a household refrigeration system that uses a variable speed compressor. The ARMAX model takes as inputs the RPM of the compressor and environmental variables, such as temperature and relative humidity. Additionally, the output variables were defined as the temperatures of the freezer, the evaporator plate, and the compartment air and the compartment air relative humidity. The results of the experimental tests showed that the ARMAX model reproduces with high accuracy the dynamic behavior of the refrigeration system with less than 7% error. Tests of energy consumption and food storage were performed according to the NTC 2078 standard, which applies to household refrigeration systems manufactured or sold in Colombia. These tests indicated that the refrigeration system with a variable speed compressor consumes 15% less energy than an equivalent conventional refrigeration system and that the temperature profiles inside the compartment are more stable.

Available documents

Format PDF

Pages: 178-187

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Identification and digital control of a household refrigeration system with a variable speed compressor.
  • Record ID : 30012679
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 48
  • Publication date: 2014/12

Links


See other articles in this issue (23)
See the source

Indexing