Conveners
C3Po1A - Applications: Instrumentation and Controls
- Seth Potratz (Praxair - Member of the Linde Group)
- Sergiy Putselyk
With the development of DC power supply systems, breaking capacity of circuit breakers has been increasingly unable to meet the growing requirements for DC system short-circuit current level. To ensure the safety of the systems, a fault current limiter must be used in series with circuit breakers. The properties of superconducting fault current limiters such as fast reaction rate, simple...
The 1.3GHz LCLS-II Cryomodule (CM) has 8 cavities and each cavity has 9 RF cells and a 50W heater. The1.3GHz LCLS-II CM is 12.2-meter-long and contains a total 241.3 liters (equivalent liquid) of liquid helium, which is filling up by the 4KW@2.0K cryogenic plant at the Fermilab Cryomodule Test Facility (CMTF). A new dynamic synthesis PID control of 2K cryogenic control system is built to...
Helium widely used as cover gas and purge gas in reactor. During the nuclear fission reaction, a large amount of radioactive krypton and xenon will be produced and diffused to helium continuously, which are need to remove respectively. In this study we designed a cryogenic adsorption separation system based GM refrigerator. According to different requirements for adsorption separation, we...
Pressure sensors and laser ranging are often used to test the dynamic characteristics of pistons. The test results obtained by them are usually intuitive and accurate, however, the debugging process is complex. In order to simplify the test process of displacer dynamics in cryogenic coolers, the vibration signal analysis method is used to test the dynamic characteristics of it, and the results...
The vacuum group of NSRRC developed a task-oriented chatbot application based on LINE message platform in 2018. LINE message is a cross-platform communication software that can be easily used on mobile phone, tablets, and PC. This interactive user interface can not only reply the real-time status of sub-systems when the user has a query but also proactively report alert. The TPS cryogenic...
Normally, in order to characterize multilayer insulation installed onto a test tank, the boil-off of the tank is measured and then heat loads from structural and fluid penetrations are calculated from temperature measurements throughout the system. For the Structural Heat Intercept, Insulation, and Vibration Evaluation Rig testing, it was determined that this approach would have significant...
Most of the mechanical property issues in coated conductors are still unknown. Some of the predictive models that’s has been currently developed have a difficulty in defining the parameters that critically influence stress states of the conductor layers. Also the material properties like young’s modulus; thermal expansion has been assumed in those models. As a result, these models can only...
This paper deals with multivariable on-line model predictive control (MPC) for helium Warm Compression Stations (WCS). During WCS operation, control algorithms must ensure that the constraints are respected. These constraints can be imposed by the system itself (valves open from 0 to 100 %, compressor maximum current and pressure, …), or imposed by the users (valves which must remain closed or...
In many fields of engineering, conception and operation teams need to perform simulations in order to design systems fulfilling the user requirements and to operate the systems efficiently. To simulate a cryogenic plant and its distribution to the end-users, a large number of commercial or homemade tools are nowadays available. However, there is a lack of available solutions for quick dynamic...
