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Developments in compression and expansion.

Author(s) : SMITH I. K.

Type of article: Periodical article

Summary

The author conducted tests on a Groll compressor and two types of rotary expander. The Groll compressor is a unique design of vane rotary compressor in which the vanes are carried in cylindrical mountings and are oscillated by a shaft crank. These vanes do not contact the cylinder barrel and therefore do not have the wear problems of normal vane rotaries. The tests showed this machine to have volumetric and adiabatic efficiencies similar to or slightly better than a vane rotary and much better than a reciprocating compressor. The two-phase expanders intended to replace the expansion valve were a rotary vane machine and a screw machine. Of these the rotary showed some promise and a modified version of the screw did likewise. The author concludes that the Groll compressor warrants further development over a range of sizes, and the possibility of rotary expanders for very large plants, ie over 1 megawatt input, may show power savings. D.W.H.

Details

  • Original title: Developments in compression and expansion.
  • Record ID : 1993-1368
  • Languages: English
  • Source: Inst. Refrig., Adv. Proof - 11 p.; 20 fig.; 9 ref.
  • Publication date: 1992/03/05
  • Document available for consultation in the library of the IIR headquarters only.

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