Evolution of the standard helium liquefier and refrigerator range designed by air liquide dta, france

Abstract

The standard helium liquefier and refrigerator range, called Helial and designed by Air Liquide DTA, has recently been upgraded in order to improve the efficiency of these machines. Indeed, over the multi-range markets requiring these cryogenic systems, (international laboratories, aerospace applications, synchrotrons, HTS applications...), the technological solution has to provide increasingly high performances. The new Helial Evolution range, equipped with very reliable DTA turbo-expanders, constitutes a highly efficient product for this wide application field. The optimizations, adaptations and results of the Helial Evolution series, doubling the performance for the same power consumption, will be presented. © 2008 American Institute of Physics.