Speakers
Description
Throughout the progression of particle accelerator technology, there has been a significant upsurge in the demand for cooling capabilities within the superfluid helium temperature range. The integration of cold compressors not only minimizes the size of heat exchangers but also optimizes the utilization of cold exergy. In the context of multi-stage serial centrifugal cold compressors, the operation in pumping down, along with dynamic load conditions, is prone to surge phenomena due to the substantial fluctuation in flow rates. To reduce the expenses of manual control, this paper presents the dynamic model for the superfluid helium system and associated components, validations are also carried out by comparison of the model’s calculated results with the test results through a cold compressor experimental platform. Further to this work, the study delves into the control mechanisms governing the rotational velocities of the cold compressor series and the bypass valve. It also introduces the MPC controller for anti-surge control, aiming to enhance the operational efficiency and stability of the superfluid helium refrigeration systems.
