Conveners
C3Po1F - Large Scale Refrigeration and Liquefaction I
- Renzhuo Wang (Fermilab)
- John Jurns (National Institute of Standards and Technology)
The JT-60SA cryogenic system will be operated at cryogenic temperature in 2019 in closed loop, without the cryogenic users (superconducting magnets, current leads, thermal shields). It will be another opportunity to verify the efficiency of the control strategies in order to handle plasma operation planned in 2020. This paper updates the heat load profiles to be extracted by the refrigerator...
Large scale helium liquefaction/refrigeration plant plays a vital role in the advanced large equipment such as fusion reactors and accelerators. A new helium liquefaction cycle with double stage compressor is proposed in this paper, which is different from the Collins cycle. The helium gas from the compressor is divided into two parts. The medium-pressure helium gas as one part flows through...
Co-simulation of Cryoplant and Tokamak superconducting magnet system has been performed to investigate operation performance. Cryoplant model, developed by EcosimPro®, consists of three identical refrigerators connected with integrated distribution box, called CTCB, and distribute the cooling to five Auxiliary Cold Boxes (ACB) for magnets and cryopump cooling. Meanwhile, superconducting...
A refrigerator with 250W cooling power at 4.5K is developed in the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences. This refrigerator operates stably and meets the design target after the test and commission. A dewar is uesed to store the liquid helium produced by the refrigerator. A electronic heater and a thermometer are placed in the bottom of the dewar to test the...
The Shanghai Synchrotron Radiation Facility (SSRF) is an intermediate energy light source built at Zhang-Jiang Hi-Tech Park in Shanghai, China. The RF power and voltage required for storing the electron beam are provided by means of three SC cryomodules, each containing one 500 MHz superconducting cavity. A cryogenic plant with cooling capacity of 650 W at 4.5 K (herein called SSRF-I...
Main technical limitations associated with the traditional industrial fluid systems are the following:
- Slow cooling of equipment in order to reach steady-state operation conditions, and associated with it significant loss of the fluids;
- Insufficient thermal and hydraulic stability, due to harmful physical effects (pressure spikes and surge, overpressure, cavitation, reduced density and...
