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Differences in the application technologies of screw and reciprocating compressors.

Author(s) : PITT A. J.

Type of article: Periodical article

Summary

The main difference in performance of screw versus reciprocating compressors is in their volumetric efficiency. Due to the effect of clearance volume, the volumetric efficiency of a reciprocating compressor falls with increasing compression ratio. As the loss in a screw compressor is mainly in leakage paths between discharge and suction the decrease in volumetric efficiency is not so great. The opposite is the case for isentropic efficiency. Factors which favour the screw design are the ease of using an economiser, usage with varied refrigerants and fully modulating unloading devices. Some problems exist in choosing an oil for lubrication and sealing which does not fall to a very low viscosity at discharge temperature. These and other factors affecting choice are discussed. D.W.H.

Details

  • Original title: Differences in the application technologies of screw and reciprocating compressors.
  • Record ID : 1996-0134
  • Languages: English
  • Source: Inst. Refrig., Adv. Proof - 7 p.; 5 fig.; 1 tabl.
  • Publication date: 1995/04/06

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