Conveners
Tue-Af-Posters Session 1.1: Large Scale Cryogenics I
- Minoru Takeda (Kobe University)
Dr
Kwanwoo Nam
(ITER Korea, NFRI)
08/07/2014, 14:15
C-01: Large scale refrigeration, liquefaction
Poster presentation (105min)
Thermal Shield (TS) in the ITER tokamak cuts off the radiation heat load from the vacuum vessel/cryostat transferring to the magnets operating at 4.5 K. The TS will be cooled down by 80 K helium gas supplied from the cryoplant. The helium goes through the cooling tubes attached on the TS. The TS consists of a lot of panels, which are to be connected by bolted joints. The panels have their own...
Dr
Jianqin Zhang
(IHEP,CAS)
08/07/2014, 14:15
C-01: Large scale refrigeration, liquefaction
Poster presentation (105min)
With the development of superconducting accelerators, a massive increase of helium is needed for the superconducting equipment of the Accelerator Driven Sub-critical System in the Institute of High Energy Physics (IHEP-ADS). Since the cryogenic system requires a high standard of helium purity, a helium purification system will be built to use helium efficiently and circularly. The purifier is...
HIDEKI TATSUMOTO
(Japan Atomic Energy Agency)
08/07/2014, 14:15
C-01: Large scale refrigeration, liquefaction
Poster presentation (105min)
At the J-PARC, supercritical hydrogen with a pressure of 1.5 MPa and a temperature below 20 K is used as a moderator material to provide a pulsed cold neutron beam. The J-PARC cryogenic hydrogen system provides the supercritical hydrogen to three moderators and removes total nuclear heating of 3.75 kW for a 1-MW proton beam operation. A heater and a cryogenic accumulator with bellows structure...
Mr
Shiran Bao
(Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou, 310027, P. R. China)
08/07/2014, 14:15
C-01: Large scale refrigeration, liquefaction
Poster presentation (105min)
The demands for industrial gases are increasing rapidly. It is of great importance to further reduce the energy consumption and cut down the unit cost for gases, in particular for the large-scale air separation systems, which mainly depends on cryogenic distillation. However, since the air separation device itself technical limitations, it is challenging to significantly improve the efficiency...
Mr
Laurent Jean Tavian
(CERN)
08/07/2014, 14:15
C-01: Large scale refrigeration, liquefaction
Poster presentation (105min)
Beginning of year 2013, after the first three years of operation, the Large Hadron Collider (LHC) was progressively emptied from helium and warmed up to the ambient temperature in order to perform during its first long shutdown all necessary consolidation and maintenance of different technical systems. During the warm-up, six helium leaks were declared on the cryogenic distribution line (QRL)....
Prof.
Xiujuan Xie
(1Key Lab of Cryogenics, Technical nstitute of Physics and Chemistry Chinese Academny of Science)
08/07/2014, 14:15
C-01: Large scale refrigeration, liquefaction
Poster presentation (105min)
In order to simulate the transient behaviors of a newly developed 2kW helium refrigerator, numerical models of the critical equipments, including a screw compressor with variable-frequency drive, plate-fin heat exchangers, a turbine expander, and pneumatic valves were developed. Meanwhile the related control strategies were involved. To validate these models, dynamic simulation was set to...
Prof.
Yanzhong Li
(Xi'an Jiaotong University)
08/07/2014, 14:15
C-01: Large scale refrigeration, liquefaction
Poster presentation (105min)
In this paper, a novel single-column air separation process is proposed to reduce energy consumption through the implementation of thermal pump technique and introduction of LNG cold-energy. Compared with conventional double-column cryogenic process, the new single-column distillation utilizes a nitrogen compressor acting as a thermal pump, which recuperates both the latent and sensible heat...
