Speaker
Dr
Tao Yan
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
Description
Abstract. A 40L/h Helium Liquefier is established at the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences. A measurement and control system based on Siemens PLC S7-300 for this Helium Liquefier is developed. Proper sensors are selected, for example, three types of transmitters are adopted respectively according to detailed temperature measurement requirements. Siemens S7-300 PLC CPU315-2PN/DP is as master station and two sets of ET200M DP remote expand I/O is as slave station. Profibus-DP field communication is established between the master station and the slave stations. The upper computer Human Machine Interface (HMI) is compiled using Siemens configuration software WinCC V7.0. The upper computer communicates with PLC by means of industrial Ethernet. A specific control logic for this Helium Liquefier is developed. The control of the inlet and outlet pressures for the compressor and the control of the turbine loop are discussed in this paper. After several months’ commissioning, the temperature before the throttle valve has reached to conversion temperature.
Keywords: 40L/h Helium Liquefier, Measurement and control system, PLC, control logic
ACKNOWLEDGMENTS:
This work is supported by the Key Laboratory of Cryogenics, TIPC, CAS(CRYOQN201307).
Author
Ms
Jing Li
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
Co-authors
Dr
Bin Dong
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
Dr
Bingming Wang
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
Prof.
Lianyou Xiong
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
Prof.
Liqiang Liu
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
Dr
Tao Yan
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
Mr
Teng Liu
(Beijing Sciample Technology Co., Ltd., Beijing, 100190, China)
Mr
Xiangdong Xu
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
Dr
Zhongjun Hu
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
