CEC-ICMC 2015 - Timetable, Abstracts and Presentations

Study of a multi-strategy controller on a helium liquefier

Not scheduled

2h

JW Marriott Starr Pass Resort

Poster Presentation CEC-01 - Large-Scale Refrigeration and Liquefaction

Speaker

Liqiang Liu (Technical Institute of Physics and Chemistry of CAS-Academia Si)

Description

Helium liquefier is widely used in the fields of superconducting, nuclear fusion energy and high-energy physics. However, the present PID controlling system of the liquefier is not well able to keep the compressor suction pressure, outlet pressure and turbine inlet pressure all in the expected range. Thus, a multi-strategy controller for a helium liquefier is proposed in this paper. A dynamic simulation model of this liquefier is also developed and shown. To study the control effect, an operation process including cool-down, steady-state and pulse of heat is described. The simulation result of this process is presented and compared with the result of the present PID controlling system.