Optimization of helium liquefier in terms of reduced factors

Abstract

A screw compressor ensures supply of gaseous helium into a cryoblock at the rate of 45 g/sec at a pressure of 1.75 MPa and a temperature of 300 K. The capacity of the liquefier is 90 _+ 5 liter/h. The helium liquefied in the liquefier is led into a cryostat of an electric drive system. The evaporating gaseous helium is used to cool supports and shields, warms up, and is sucked into the compressor. The purpose of optimization is to minimize specific reduced expenditure, reduced mass, and reduced volume of the cryoblock and the liquefier: