Efficient liquefaction of hydrogen is a crucial part for the large-scale storage and long-
distance transportation of hydrogen. Helium Brayton cycle based on high-speed turbo …

Large-scale helium cryogenic systems are widely used in superconducting systems, nuclear
fusion engineering, space exploration and large scientific engineering, etc. However, its …

Large-scale helium cryo-refrigerator is widely used in superconducting systems, nuclear
fusion engineering, and scientific researches, etc., however, its energy efficiency is quite …

In this paper, a simple, general and scalable hierarchical control framework is proposed and
validated through the interconnection of the Joule–Thomson and the Brayton cycle stages of …

Helium liquefaction systems are widely used in nuclear fission, superconductivity, space
industries, and other scientific instruments. However, the efficiency of these systems is quite …

In this paper, a complete industrial validation of a recently published scheme for on-line
adaptation of the control updating period in model predictive control is proposed. The …

The problems of designing and employing cryogenic systems operating in transient modes
over a considerable operating time as well as various methods of simulating transient …

Abstract Analysis of data obtained during the spring 2013 commissioning of the new 4.5 K
refrigeration system at Jefferson Lab (JLab) for the 12 GeV upgrade indicated a wide …

In this paper, a nonlinear observer of the thermal loads applied to the helium bath of a
cryogenic refrigerator is proposed. The thermal loads represent a time-varying thermal …

In this paper, a multivariable model-based non-linear controller for Warm Compression
Stations (WCS) is proposed. The strategy is to replace all the PID loops controlling the WCS …