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A novel experimental rig to investigate the effect of the refrigerant on the oil supply of a variable capacity reciprocating compressor.

Number: 1307

Author(s) : BRAGA V. M., DESCHAMPS C. J.

Summary

Lubrication plays a key role in assuring the reliability and efficiency of compressors and thus it has been the subject of many studies. However, the available investigations do not consider the presence of refrigerant and its effects on the oil supply. This paper reports the development of a novel experimental rig to measure the oil flow rate provided by the screw pump of the oil supply system of a hermetic variable capacity reciprocating compressor considering the presence of the refrigerant in contact with the lubricating oil. Experimental tests were carried out to investigate the effects brought about by the interactions between the AB ISO VG 5 oil and both air and R-600a as working fluids, considering that the oil and air are immiscible. The oil flow rate was measured under different operating conditions to assess the influence of the evaporating temperature and compressor speed on the oil flow rate. The results show that when compared to measurements with air, the presence of refrigerant gas decreases the oil flow rate, and this effect seems to be slightly potentialized by the increase of the evaporating pressure.

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Pages: 7 p.

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  • Original title: A novel experimental rig to investigate the effect of the refrigerant on the oil supply of a variable capacity reciprocating compressor.
  • Record ID : 30030307
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 26th International Compressor Engineering Conference at Purdue.
  • Publication date: 2022/07/15

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