A Low Porosity Regenerator Matrix for High Frequency Low Temperature Cryocoolers

Ladner, D. R.; Martin, J. Holmes; Thompson, Paul

doi:10.1007/0-387-27533-9_51

Cited by 1 publication

(1 citation statement)

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“…Recently, this challenge was well discussed by Ladner, et. al [3] in which a theoretical parallel plate regenerator was posed as a means to achieve the desired low porosity while maintaining an acceptably low pressure drop. As another example, packed beds of rare earth powders with varying diameters have been used successfully to achieve lower porosities than the geometric 38% obtained with a packed bed of spheres of identical size [4].…”

Section: Discussionmentioning

confidence: 99%

Raytheon Rsp2 Cryocooler Low Temperature Testing and Design Enhancements

Hon¹,

Kirkconnell²,

Shrago³

et al. 2010

AIP Conference Proceedings

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The High Capacity Raytheon Stirling / Pulse Tube Hybrid 2-Stage cryocooler (HC-RSP2) was originally developed to provide simultaneous cooling at temperatures of 85 K and 35 K. During testing performed in 2008 it was demonstrated that this stockconfiguration cryocooler is capable of providing significant amounts of heat lift at 2 nd stage temperatures as low as 12 K, and modeling indicated that minor changes to the 2 nd stage inertance tube / surge volume setup could yield improved performance. These changes were implemented and the cooler was successfully retested, producing >350 mW of heat lift at 12 K. A comprehensive redesign of the system has been performed, the result of which is a robust 2-stage cryocooler system that is intended to efficiently produce relatively large amounts of cooling at 2 nd stage temperatures <12 K. This cryocooler, called the Low Temperature RSP2 (LT-RSP2) will be fabricated and tested over the next 12 months. This paper reports on the recently-completed test activities, as well as details relating to the system redesign. Expected performance, mass and packaging volume are addressed.

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Section: Discussionmentioning

confidence: 99%