Development of a Low Cost High Frequency Pulse Tube Cryocooler

Wang, C.; Caughley, Alan; Haywood, David

doi:10.1063/1.2908521

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…As a key component, the losses in the pulse tube, especially the lowest stage pulse tube, has an important influence on the performance of the cryocooler. The losses 1240 (2022) 012134 IOP Publishing doi:10.1088/1757-899X/1240/1/012134 2 can be expressed in the form of internal entropy flow [5][6][7] . By pre-cooling the gas inside the pulse tube, the entropy flow can be reduced, thereby the cooling capacity of the cryocooler could be increased.…”

Section: Introductionmentioning

confidence: 99%

Development of a 20K two-stage Stirling type pulse tube cryocooler with pre-cooling inside second-stage pulse tube

Wang

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Cryocoolers working in the liquid hydrogen temperature are important for applications such as cryo-pump, superconductor cooling and cryogenic electronics. This paper analyzes and compares the 20K gas-coupled two-stage Stirling type pulse tube cryocooler with and without pre-cooling. The pre-cooling uses some of the cooling power generated by the first stage cold head to pre-cool the middle of the second stage pulse tube. Given the same input acoustic power, the simulation results show that the cooling capacity of the second stage increase from 0.64 W to 2 W@20 K while the first stage available cooling capacity decrease from 5.84 W to 3 W@77 K when the pre-cooling is used. Meanwhile, the cryocooler relative Carnot Efficiency in terms of acoustic power increases from 10.3% to 14.6%.

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Section: Introductionmentioning

confidence: 99%

Development of a 20K two-stage Stirling type pulse tube cryocooler with pre-cooling inside second-stage pulse tube

Wang

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Diaphragm pressure wave generators (DPWG) developed by Industrial Research Ltd, now called Callaghan Innovation [1][2][3][4], have matured over the last decade to become a useful alternative to linear motor pressure wave generators for Stirling and pulse tube cryocoolers [5][6][7][8]. To date, 15 metal diaphragm pressure wave generators have been made and operated with swept volumes from 20 cc to 1000 cc and with 500 W to 30 kW input power, respectively.…”

Section: Introductionmentioning

confidence: 99%

A free-piston Stirling cryocooler using metal diaphragms

et al. 2016

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“…The first machines had a swept volume of 200 cc and produced up to 3.2 kW of acoustic, or P-V, power with an electro-mechanical efficiency of 72% [1] at 50 Hz. This PWG was successfully coupled to a pulse tube refrigerator that achieved 108 W @ 77 K [2]. Three prototypes were over-stroked to 240 cc swept volume for a customer and put into service in a CO 2 scrubber, each providing approximately 6 kW of P-V power to a pulse tube achieving 600 W @ 120 K [3].…”

Section: Introductionmentioning

confidence: 99%

30 kW metal diaphragm pressure wave generator

Caughley¹,

Branje²,

Klok³

2014

AIP Conference Proceedings

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Abstract. Callaghan Innovation has been developing a metal-diaphragm pressure wave generator technology for pulse tube or Stirling cryocoolers since 2005. A series of successful pressure wave generators have been designed, fabricated and demonstrated ranging in swept volume from 20 to 240 cc driven by commercially available induction motors of powers from 0.5 kW to 7.5 kW respectively. A number of pulse tubes have also been design and successfully trialed with these pressure wave generators. Cooling powers up to 600 W at 120 K have been achieved. We have now scaled the pressure wave generator technology to 1000cc swept volume, powered by a 30 kW induction motor with the intention of providing over 20 kW of acoustic power to either pulse tube or Stirling expanders. The aim is to develop a cryocooler with more than 1000 W of refrigeration at 77 K. Target applications include liquefaction and High Temperature Superconducting devices. Initial results from testing the 1000 cc pressure wave generator are presented and we will discuss the challenges and advantages involved in scaling the metal diaphragm technology to higher acoustic powers.

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Development of a Low Cost High Frequency Pulse Tube Cryocooler

Cited by 8 publications

References 5 publications

Development of a 20K two-stage Stirling type pulse tube cryocooler with pre-cooling inside second-stage pulse tube

Development of a 20K two-stage Stirling type pulse tube cryocooler with pre-cooling inside second-stage pulse tube

A free-piston Stirling cryocooler using metal diaphragms

30 kW metal diaphragm pressure wave generator

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