Conveners
Tue-Af-Posters Session 1.2: Cryocoolers I
- Naiho Song
Prof.
Junjie Wang
(Key Laboratory of Cryogenics, TIPC, Chinese Academy of Sciences, Beijing 100190, China)
08/07/2014, 14:15
Poster presentation (105min)
The VM refrigerator with power being supplied by liquid nitrogen shows great potential for development below 10K. The 2D axisymmetric model refers to actual geometry under oscillating flow conditions is carried out using FLUENT software. The coldest temperature, the pressure in three cavities, the temperature profile along the regenerator, and the overall cooling power are present. The...
Dr
Mingyao Xu
(Sumitomo Heavy Industries, Ltd.)
08/07/2014, 14:15
Poster presentation (105min)
A compact 2K Gifford-McMahon (GM) cryocooler has been developed for cooling electronic devices, such as Superconducting Single Photo Detectors. The heat exchangers, regenerators are optimized with the simulation method developed for 4K GM cryocoolers. After optimizing, the cylinder length is reduced by about 80 mm compared with a commercial 0.1W 4K GM cryocooler. With no load on the second...
Mr
Yumoto Kenta
(Sumitomo Heavy Industries, Ltd.,)
08/07/2014, 14:15
C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers
Poster presentation (105min)
Abstract. Sumitomo Heavy Industries, Ltd. (SHI) developed a high power stirling type pulse tube cryocooler for the purpose of cooling high-temperature superconductor (HTS) devices, such as superconductor motor, SMES and current fault limiter. The experimental results of a prototype pulse tube cryocooler were reported in September 2014. For a U type expander, the cooling capacity was 151 W at...
Mr
Takaaki Morie
(Sumitomo Heavy Industries, Ltd.)
08/07/2014, 14:15
Poster presentation (105min)
4 K GM cryocoolers have been widely used for cooling superconducting magnets, such as, magnets in MRI systems. When an MRI system is operated, superconducting magnets generate a high magnetic field. Accordingly, 4K GM cryocoolers, which are installed in the MRI system, are inevitably exposed to the magnetic field. Especially, the heat capacity of the magnetic regenerator materials and the...
Mr
Dongli Liu
(Institute of Refrigeration and Cryogenics, Department of Energy Engineering, Zhejiang University)
08/07/2014, 14:15
C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers
Poster presentation (105min)
The hybrid space cryocooler consists of a Stirling or pulse tube cryocooler, serving as a precooler, and a J-T loop. With the high efficiency, compact structure, long service life, and remote cold head which can be isolated from vibration or electromagnetic interference, it has been employed by several space missions to provide the liquid helium temperature environment for the detectors. These...
Prof.
Xiujuan Xie
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China)
08/07/2014, 14:15
Poster presentation (105min)
Minor losses around the thermoacoustic parallel stack in the oscillatory flow conditions are one of the main factors influencing on the efficiency of the thermoacoustic systems. In this paper, a two-dimension model of a single stack in a standing wave thermoacoustic refrigerator is setup. The acoustic characteristics including oscillating pressure, volume flow rate and impedance of the...
Prof.
NAIK HEMANT
(MECHANICAL ENGINEERING DEAPRTMENT, SARDAR VALLABHBHAI NATIONAL INSTITUTE OF TECHNOLOGY, SURAT, GUJARAT, INDIA, 395007)
08/07/2014, 14:15
Poster presentation (105min)
Applications of thermoacoustic engine are not limited to driving the pulse tube cryocooler. Performance of thermoscousitc engine is governed by various design parameters like type of resonator, stack geometry, frequency, type of working gas etc. and various operating parameters like heat input, charging pressure etc. It is very important to arrive at an optimum configuration of the engine for...
