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Operating characteristics of a linear compressor in the cryocooler.

Author(s) : YOU X., QIU L., ZHANG H.

Type of article: IJR article

Summary

Linear compressors have been widely used in the cryocoolers and refrigerators due to the advantages of high efficiency, low vibration level and compact construction. However, due to the complicated dynamic characteristics of the linear compressor, the impedance matching of the cryocooler is still an issue. In this study, the operating characteristics of a linear compressor are studied based on the electrical and mechanical impedance. The influences of the load impedance on the displacement and efficiency are analyzed. A new efficiency map under the total impedance is proposed. Experiments on a pulse tube cryocooler with a linear compressor are conducted to verify the theoretical analyses. The maximum theoretical efficiency of 0.86 is obtained at 963+0i N s m−1. It is not affected by the displacement or the current. Two different routines by fixing the current at 20 A or fixing the voltage at 50 V are tested on the new efficiency map. The results show the feasibility of using the new map to find a better impedance matching and to achieve an efficiency of 0.68. The research is helpful to improve the whole cryocooler performance.

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Pages: 215-223

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Details

  • Original title: Operating characteristics of a linear compressor in the cryocooler.
  • Record ID : 30028712
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 129
  • Publication date: 2021/09
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.05.011
  • Document available for consultation in the library of the IIR headquarters only.

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