Experimental research on indicator diagrams of a water-lubricated twin-screw air compressor.

Number: pap. 1146

Author(s) : WANG C., TIAN Y., CHEN W., et al.


In recent years, water-lubricated twin-screw compressors have attracted more and more attention, because this type of compressors can produce the high-quality air completely free of oil and there is no contamination. However, poor sealing and lubricating properties of water might result in different operating characteristics compared with those of oil-injected compressors. A good understanding of the operating mechanism is essential in any attempt to increase the performance of the compressor, which can be achieved by means of the indicator diagram. In this paper, a prototype of the water-lubricated twin-screw air compressor was developed and a test rig was established. A series of pressure transducers were arranged in consecutive positions of the casing to measure the pressure distribution inside working chamber of the compressor. In addition, volumetric efficiency, adiabatic efficiency and mechanical efficiency of the compressor under different operating conditions were calculated based on measured volumeric flowrate and power consumption. As a result, the influence mechanism of rotating speed, discharge pressure and water injection flow-rate on the compressor performance and working process was analyzed based on indicator diagrams.

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  • Original title: Experimental research on indicator diagrams of a water-lubricated twin-screw air compressor.
  • Record ID : 30024230
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09


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