| Paper |
Title |
Page |
| THPPC116 |
Temperature Precise Control in a Large Scale Helium Refrigerator |
1331 |
| |
- Wu,J.H. wu, Q. Li, W. Pan
TIPC, BeiJing, People's Republic of China
|
|
| |
Precise control of operating load temperature is a key requirement for application of a large scale helium refrigerator. Strict control logic and time sequence are necessary in the process related to main components including a fine load, turbine expanders and compressors. However control process sequence may become disordered due to improper PID parameter settings and logic equations and causes temperature oscillation, load augmentation or protection of the compressors and cryogenic valve function failure etc. Combination of experimental studies and simulation models, effect of PID parameters adjustment on the control process is present in detail. The methods and rules of general parameter settings are revealed and the suitable control logic equations are derived for temperature stabilization.
|
|
|
Poster THPPC116 [0.584 MB]
|
|
| |