2008

“Bootstrap” Configuration for Multistage Pulse-Tube Coolers

A “bootstrap” configuration has been proposed for multistage pulse-tube coolers that, for instance, provide final-stage cooling to temperatures as low as 20 K. The bootstrap configuration supplants the conventional configuration, in which customarily the warm heat exchangers of all stages reject heat at ambient temperature. In the bootstrap configuration, the warm heat exchanger, the inertance tube, and the reservoir of each stage would be thermally anchored to the cold heat exchanger of the next warmer stage. The boot-strapped configuration is superior to the conventional setup, in some cases increasing the 20 K cooler’s coefficient of performance two-fold over that of an otherwise equivalent conventional layout. The increased efficiency could translate into less power consumption, less cooler mass, and/or lower cost for a given amount of cooling.

This work was done by Ali Kashani and Ben Helvensteijn of Atlas Scientific for Johnson Space Center.
MSC-23500-1

This Brief includes a Technical Support Package (TSP).

Bootstrap Configuration for Multistage Pulse-Tube Coolers (reference MSC-23500-1) is currently available for download from the TSP library.

Please Login at the top of the page to download.

 

White Papers

High Reliability Flexible Circuits for the Medical Marketplace
Sponsored by Tech Etch
3D Printing: Changing the Economics of Manufacturing Custom Components
Sponsored by stratasys
Re-Inventing the Rotary Encoder: The No-Compromise IXARC from POSITAL
Sponsored by Fraba Posital
Tubing & Hose Buying Tips, Part 2
Sponsored by Newage Industries
Aqueous Critical Cleaning: A White Paper
Sponsored by Alconox
PICO xMOD Data Sheet
Sponsored by Nordson EFD

White Papers Sponsored By: