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Investigation of the starting modes of the low-temperature refrigerating machines working on the mixtures of refrigerants.

Author(s) : ROZHENTSEV A., NAER V.

Type of article: Article, IJR article

Summary

The starting mode of a small low-temperature Joule-Thomson refrigerating machine is in focus of the experimental investigation reported here. The refrigerating machine operates by the Linde cycle. A mixture of hydrocarbons-isobutane/ethane/methane - is used as a refrigerant. The object of cooling is a small testing chamber to be cooled down and thermostabilized at the temperature level of -70 to-80°C. The starting modes were studied under heavy-duty heat load on the system resulting from the initial thermal equilibrium between the whole system and ambience. The experimental data demonstrate a crucial effect of the low-boiling mixture components condensation in the refrigerant high-pressure flow on the machine starting performance. Excessive values of the discharge pressure, compression ratio and compressor input power have been observed during the start-up process which may last for tens of minutes affecting the refrigerating machine reliability. Some probable causes of the phenomena and countermeasures are pointed out.

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Pages: 901-910

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Details

  • Original title: Investigation of the starting modes of the low-temperature refrigerating machines working on the mixtures of refrigerants.
  • Record ID : 2009-1419
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 5
  • Publication date: 2009/08

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