ICEC/ICMC 2014 Conference

Session

Wed-Af-Orals Session 11

9 Jul 2014, 16:00

Conveners

Wed-Af-Orals Session 11: Regenerative Cryocoolers

• Fons De Waele

213. [Invited Oral] Low-loss damping of the intrinsic temperature oscillations of 4 K pulse tube coolers

Dr Jens Falter (TransMIT GmbH, Center for Adaptive Cryotechnology and Sensors, Heinrich-Buff-Ring 16, D-35392 Gießen (Germany))

09/07/2014, 16:00

C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers

Invited Oral (30min)

The absence of moving parts inside their cold head, which results in low vibration level and high reliability, distinguishes pulse tube coolers (PTC) from other regenerative cryocoolers. However, residual disturbances originating from the periodic pressure oscillation remain for PTCs just like for Gifford-McMahon coolers. One of these effects is the variation of the cold flange temperature...

109. Experimental investigation of compact 2K GM cryocoolers

Mr qian bao (Sumitomo Heavy Industries, Ltd.)

09/07/2014, 16:30

C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers

Oral presentation (15min)

On the base of a conventional 4K Gifford-Mcmahon (GM) cryocooler, we developed a new 2K GM crycooler system which can provide considerable cooling capacity and yet being highly compact in physical size. A series of experiments were operated to confirm and show the cooling characteristic and cooling capability of this new system. It will be shown that under no-load condition the lowest...

38. Improved performance of an indigenous Stirling type pulse tube cooler and pressure wave generator

Prof. Subhash Jacob (Center for Cryogenic Technology, Indian Institute of Science)

09/07/2014, 16:45

C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers

Oral presentation (15min)

Sustained efforts have been made in our laboratory to improve the performance of an indigenously developed pressure wave generator by reducing the mechanical losses and current required to drive the piston. Currently, a matching pulse tube cooler targeted for 0.5 W @ 80 K was designed using Sage and the experience gained from previous studies. A no load temperature of 74 K was achieved. The...

251. Performance test of a G-M cooler in magnetic field.

Dr Evgeny Kostrov (Lebedev Physical Intitute RAS)

09/07/2014, 17:00

C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers

Oral presentation (15min)

The cryostat with a commercial Gifford-McMahon cryocooler (RDK-415 from SHI)with a cooling power of 1.5 W at 4.2 K is installed in the room temperature bore of the 10 T conduction cooled superconducting magnet. The magnet consists of NbTi and Nb3Sn coils which are connected in series and charged with a single power supply. Magnetic field uniformity is 0.25% over the axial length of 30...

360. The Experimental Study of Acoustically Resonant Cooling System

Jianying Hu

09/07/2014, 17:15

C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers

Oral presentation (15min)

Thermoacoustic engines (TEs) and pulse tube cryocoolers (PTCs) have attracted more and more attentions in recent years for their high reliability, high potential efficiency and use of environmentally-friendly working gas. Utilizing a TE to drive a PTC can produce a heat-driven cryocooler with no moving parts. However, the cooling capacity of the most existent heat-driven cryocoolers at the...

119. Cold inertance tube for 4 K Stirling type pulse tube cryocoolers

ZhuoPei Li (Nanjing University of Aeronautics and Astronautics)

09/07/2014, 17:30

C-02: Cryocoolers- Pulse tube, Stirling, Magnetic and other coolers

Oral presentation (15min)

The losses in the regenerator are minimized when the amplitude of the mass flow is minimized for a given acoustic power which requires that the mass flow lags the pressure by about 30° at the cold end of regenerator. The phase shift provided by an inertance tube is strongly influenced by the temperature of the inertance tube and the acoustic power at the cold end of the regenerator. For a 4 K...