NDLI: A 10 deg k triple-expansion stirling-cycle cryocooler

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A 10 deg k triple-expansion stirling-cycle cryocooler

Content Provider	NASA Technical Reports Server (NTRS)
Author	Keung, C. S. Newman, W.
Copyright Year	1983
Description	The design of a triple expansion closed cycle Stirling cryocooler optimized for a cooling load of 50 mW at 10 K is described. The cooler was designed with the objectives of low power, low weight, compactness, low mechanical motion, low electromagnetic noise, and low output temperature fluctuations. The design employs a direct drive linear motion piston motor and a triple expansion free displacer. Piston motion is controlled by feedback from an optical position transducer. Mechanical vibrations are attenuated with a passive resonant counterbalance. Electromagnetic noise is attenuated with layered high permeability magnetic shielding. The regenerators move with the displacer within a thin titanium cold finger. The piston and displacer oscillate at 8.33 Hz on bearings and seals of reinforced Teflon. The cooler is designed to provide the desired 50 mW of cooling at 10 K with a power input of less than 100 W. The piston can be driven at a greater stroke to produce up to 200 mW of cooling with an input power of 250 W. A lead and copper cold tip heat exchanger will limit temperature fluctuations to within 0.01 K.
File Size	695857
Page Count	16
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19840007268
Archival Resource Key	ark:/13960/t86h9d27p
Language	English
Publisher Date	1983-12-01
Access Restriction	Open
Subject Keyword	Pistons Vibration Damping Refrigerators Stirling Cycle Electromagnetic Interference Cryogenic Cooling Heat Exchangers Design Analysis Optimization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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