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Title: Acoustic cryocooler

Abstract

An acoustic cryocooler with no moving parts is formed from a thermoacoustic driver (TAD) driving a pulse tube refrigerator (PTR) through a standing wave tube. Thermoacoustic elements in the TAD are spaced apart a distance effective to accommodate the increased thermal penetration length arising from the relatively low TAD operating frequency in the range of 15-60 Hz. At these low operating frequencies, a long tube is required to support the standing wave. The tube may be coiled to reduce the overall length of the cryocooler. One or two PTR's are located on the standing wave tube adjacent antinodes in the standing wave to be driven by the standing wave pressure oscillations. It is predicted that a heat input of 1000 W at 1000 K will maintian a cooling load of 5 W at 80 K.

Inventors:
 [1];  [2];  [3]
  1. Santa Fe, NM
  2. Los Alamos, NM
  3. Louisville, CO
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
867514
Patent Number(s):
4953366
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F25 - REFRIGERATION OR COOLING F25B - REFRIGERATION MACHINES, PLANTS OR SYSTEMS
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02G - HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
acoustic; cryocooler; moving; formed; thermoacoustic; driver; tad; driving; pulse; tube; refrigerator; ptr; standing; wave; elements; spaced; apart; distance; effective; accommodate; increased; thermal; penetration; length; arising; relatively; operating; frequency; range; 15-60; hz; frequencies; required; support; coiled; reduce; overall; located; adjacent; antinodes; driven; pressure; oscillations; predicted; heat; input; 1000; maintian; cooling; load; 80; pulse tube; operating frequency; tube adjacent; spaced apart; standing wave; wave tube; pressure oscillations; heat input; overall length; tube refrigerator; acoustic cryocooler; acoustic driver; distance effective; /62/60/

Citation Formats

Swift, Gregory W, Martin, Richard A, and Radenbaugh, Ray. Acoustic cryocooler. United States: N. p., 1990. Web.
Swift, Gregory W, Martin, Richard A, & Radenbaugh, Ray. Acoustic cryocooler. United States.
Swift, Gregory W, Martin, Richard A, and Radenbaugh, Ray. Mon . "Acoustic cryocooler". United States. https://www.osti.gov/servlets/purl/867514.
@article{osti_867514,
title = {Acoustic cryocooler},
author = {Swift, Gregory W and Martin, Richard A and Radenbaugh, Ray},
abstractNote = {An acoustic cryocooler with no moving parts is formed from a thermoacoustic driver (TAD) driving a pulse tube refrigerator (PTR) through a standing wave tube. Thermoacoustic elements in the TAD are spaced apart a distance effective to accommodate the increased thermal penetration length arising from the relatively low TAD operating frequency in the range of 15-60 Hz. At these low operating frequencies, a long tube is required to support the standing wave. The tube may be coiled to reduce the overall length of the cryocooler. One or two PTR's are located on the standing wave tube adjacent antinodes in the standing wave to be driven by the standing wave pressure oscillations. It is predicted that a heat input of 1000 W at 1000 K will maintian a cooling load of 5 W at 80 K.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}

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