NEW CRYOCOOLER-BASED HELIUM LIQUEFACTION AND PURIFICATION TECHNIQUES. FROM RECOV

NEW CRYOCOOLER-BASED HELIUM LIQUEFACTION AND PURIFICATION TECHNIQUES. FROM RECOV

Editorial:
PRENSAS DE LA UNIVERSIDAD DE Z
Año de edición:
ISBN:
978-84-16933-62-4
Páginas:
224
Encuadernación:
Rústica
Colección:
COLECCIÓN DE ESTUDIOS DE FÍSICA
-5%
30,00 €
28,50 €
IVA incluido
Agotado

The purpose of this thesis is to present the development of an emerging
technology for small-scale helium recovery, focusing in all the needed steps: helium
recovery, helium purification and helium liquefaction. This technology uses
cryocoolers for both, the liquefaction and the purification, in a novel way: the gas is
simply in direct thermal contact with the cryocooler, and, the process takes advantage
smartly of the outstanding helium properties. The technology is efficient, modular and
scalable, making feasible the installation in almost any facility, from very small size
(e.g. average helium consumption less than 1 L/day), to medium size (e.g. 200 L/day).
Finally, we present the ultra-pure liquid helium concept "Clean Helium"
(hydrogen-free liquid helium) that has been produced with the technology presented
here. "Clean Helium" solves a global issue: The blocking of fine capillary tubes used
as flow impedances in 4He evaporation cryostats to achieve temperatures below 4.2 K.