Conveners
Wed-Af-Posters Session 2.2: Cryo-Coolers II
- Mingyao Do Xu
Dr
Jianying Hu
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
09/07/2014, 14:15
C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers
Poster presentation (105min)
A substantial fraction of the volume of a traditional pulse tube cryocooler is occupied by a reservoir, which greatly reduces the specific power of the cryocooler. This is undesirable for applications that require a small size and weight. This paper presents an inter-phasing pulse tube cryocooler conjoining two or more cold fingers via their inertance tubes. Because the volume flow in the cold...
Dr
Xiaotao Wang
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry of CAS)
09/07/2014, 14:15
C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers
Poster presentation (105min)
The high capacity cryocooler working below 30K can be applied in many applications in many fields such as superconducting motors, superconducting power and cryopump. Compared to the GM cryocooler, the Stirling cryocooler can achieve higher efficiency and more compact structure. Because of its obvious advantages, we have designed a two stage free piston Stirling cryocooler system in our...
Prof.
Junjie wang
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, CAS), Mr
Liubiao Chen
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, CAS), Dr
Qiang Zhou
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, CAS)
09/07/2014, 14:15
C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers
Poster presentation (105min)
Regenerator, a most important part of pulse tube refrigerator (PTR), must be carefully designed especially when working at high frequency and ultra-low temperature. In process of selecting regenerator materials, much attention is paid on the heat capacity of regenerator materials, while thermal conductivity is always omitted. In this paper, an effort will be made on explaining how thermal...
Prof.
H.B. Naik
(Sardar Vallbhbhai National Institute of Technology Surat, Gujarat, India)
09/07/2014, 14:15
C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers
Poster presentation (105min)
Research on Stirling type Pulse Tube Cryocooler(PTC) is focused on achieving lower temperatures by cascading the stages or by multi-staging. Multi-staging can be done either by gas coupling or by thermal coupling of the stages. In the thermal coupling option, either a two stage cooler can precool a single stage PTC to reach lower temperatures or a single stage PTC can cool a two stage PTC. In...
Ms
Mei Wu
(Institute of Refrigeration and Cryogenics)
09/07/2014, 14:15
C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers
Poster presentation (105min)
With no moving parts at the cold head, a pulse tube cooler can in principle not not achieve the Carnot efficciency since the acoustic power is finally dissipated in phase shifters. Based on our previous study, a cascade pulse tube cooler working at 233 K with 200 W class cooling power is designed, fabricated and tested, in which the secondary stage is driven by the recovered acoustic power...
Dr
Houlei Chen
(Technical Institute of Physics and Chemistry, CAS, China)
09/07/2014, 14:15
C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers
Poster presentation (105min)
Phase shifting characteristics of inertance tube in small scale pulse tube cryocooler are investigated experimentally. It was found that the length of inertance tube whose diameter is 1mm has a more significant influence on the optimal frequency of the pulse tube cryocooler than the inertance tube with diameter 3mm. The performances of the pulse tube at each optimal frequency is not...
Ms
Ya XU
(Institute of Refrigeration and Cryogenics, Zhejiang University)
09/07/2014, 14:15
C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers
Poster presentation (105min)
Stirling cryocoolers are promising in high temperature superconductivity application and small scale gas liquefaction, due to their high efficiency, wide operating temperature range and fast cool-down process. A high-power Stirling cryocooler driven by a crank-rod mechanism was studied systematically. A numerical model built upon Sage-software was used to show the detailed characteristics of...
Mr
Jens Hoehne
(Pressure Wave Systems GmbH, Haeberlstr. 8, 80337 Munich, Germany)
09/07/2014, 14:15
C-03: Expanders, Pumps, compressors, regenerators and other components
Poster presentation (105min)
Pressure Wave Systems GmbH is developing low frequency linear compressors to directly drive GM or pulse tube cryocoolers without the need for a rotary valve. Since the rotary valve can be identified to account for substantial efficiency losses in conventional arrangements there is a large potential for increased energy efficiency. We have built a low frequency linear compressor that shows that...
Prof.
Houlei Chen
(Technical Institute of Physics and Chemistry ,CAS)
09/07/2014, 14:15
C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers
Poster presentation (105min)
The objective of this paper was to demonstrate and analyze the influence of cold-end connection tube in U-shape pulse tube cooler (UPTC). A UPTC was constructed and experimented and the performance was undesirable. According to the experimental results, the temperature difference between the cold-end heat exchangers of the pulse tube and regenerator always existed. This phenomenon was...
