THE OPTIMIZATION OF CRYOGENIC HELIUM UNIT WITH ENERGY-CRYOGENIC STEP

Abstract

The actual task is the creation of cryogenic helium units in which compression of helium has made in centrifugal compressors. Through of small degrees of compression of helium in one step it fails now to develop suitable for this purpose helium turbo compression. In the given article continuing cycle of the early publications of the writer, the helium refrigerator with energy-cryogenic step is considered. The most simple diagram of energy-cryogenic step realizing gaseous expander cycle is applied to simplification of optimization calculations and following analysis. The step makes operation for a drive of cold helium turbocompression and at the same time —  a cold for heat elimination of compression. The working bodies of energy-cryogenic step are nitrogen, neon and argon. Helium is compressed in cold four-step centrifugal compressor, since temperature 85,8 K. The optimization of the refrigerator on a level 4,5 K was carried out at the same value of cold-productivity 576 W. The fulfilled optimization has shown that the creation of the rather effective helium refrigerator on a basis only of machines of dynamic operation is possible.