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3-Cycle pulse tube cooler for cryogenic high-power applications.

Number: pap. n. 052

Author(s) : KUHN M., KAISER G., SCHILDBACH T., et al.

Summary

A new type of high-power pulse tube cryocooler (3C-PTC), composed of three connected single PTCs with a prospected cooling capacity of 1 kW at 80 K has been developed and is currently under investigation. With this arrangement the orifice or inertance tube at the warm end of the pulse tube of common PTC is replaced by an expansion piston. This principle enables a coefficient of performance (COP) which is comparable to that of Stirling cryocoolers. Furthermore, this arrangement allows the exact adjustment of the phase shift between pressure wave and volume flow. In the 3C-PTC the expansion piston of the previous cycle supports the compression piston of the following cycle, being combined to form a single moving part driven by a high-force synchronous oscillating motor. So a crank shaft can be avoided what ensures low vibration and low-noise operation. The 3C-PTC is suitable to supply cooling power for high-power applications like high-temperature superconducting fault-current limiters, motors and generators. The target COP of about 12% is significantly higher than that of commercial systems. The 3C-PTC is already manufactured and first experimental results will be presented.

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Pages: 120-125

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Details

  • Original title: 3-Cycle pulse tube cooler for cryogenic high-power applications.
  • Record ID : 30005810
  • Languages: English
  • Source: Cryogenics 2012. Proceedings of the 12th IIR International Conference: Dresden, Germany, September 11-14, 2012.
  • Publication date: 2012/09/11

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