Investigation of Scroll Fluid Machinery for Cryogenic Helium Refrigerators.

摘要

The objective of the program was to investigate the applicability of scroll fluid machinery (compressors and expenders) to cryogenic helium refrigerators or liquefiers for superconductive ship propulsion systems. Thermodynamic cycles for appropriate refrigerator/liquefier systems have been analyzed; and, based on the results of this analysis, typical performance characteristics for a scroll compressor and a scroll expander suitable for these systems have been defined. Design requirements for the scroll compressor, a 90 SCFM unit with a 16 to 1 pressure ratio, have been established and a design for an experimental, oil-lubricated unit suitable for laboratory testing evolved. The design is based, in part, on information obtained from tests on the Arthur D. Little, Inc. (ADL) 1 to 3 Hp scroll compressor. The results of these tests are described.