Influence of liquid refrigerant injection on the performance of an inverter-driven scroll compressor

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61 Citations (Scopus)

Abstract

The operation of a scroll compressor at high compression ratios can cause excessively high discharge temperatures, which can be detrimental to the reliability and efficiency of the compressor. In the present study, the performance of an inverter-driven scroll compressor with liquid refrigerant injection was measured with a variation of compressor frequency, injection pressure, and injection location. The influence of the liquid injection on the performance is presented as a function of operating parameters and injection location by comparing the results with those for the non-injection case. It was found that liquid injection under high frequency was very effective at attaining higher performance and reliability of the compressor, but injection under low frequency showed some disadvantages. For high frequency at a given injection ratio, the injection at α = 180°, for an injection angle at an injection port, yielded slightly better performance of the compressor as compared to that at α = 90°.

Original languageEnglish
Pages (from-to)87-94
Number of pages8
JournalInternational Journal of Refrigeration
Volume26
Issue number1
DOIs
Publication statusPublished - 2003 Jan

Keywords

  • Injection
  • Measurement
  • Performance
  • Refrigerating compressor
  • Scroll compressor
  • Test
  • Variable speed

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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