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Title: Superfluid thermodynamic cycle refrigerator

Abstract

A cryogenic refrigerator cools a heat source by cyclically concentrating and diluting the amount of .sup.3 He in a single phase .sup.3 He-.sup.4 He solution. The .sup.3 He in superfluid .sup.4 He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid .sup.3 He at an initial concentration in superfluid .sup.4 He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of .sup.4 He while restricting passage of .sup.3 He. The .sup.3 He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K.

Inventors:
 [1];  [2]
  1. (Santa Fe, NM)
  2. (La Canada, CA)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
868601
Patent Number(s):
US 5172554
Assignee:
United States of America as represented by United States (Washington, DC) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
superfluid; thermodynamic; cycle; refrigerator; cryogenic; cools; heat; source; cyclically; concentrating; diluting; amount; single; phase; he-; solution; manner; ideal; gas; vacuum; refrigeration; obtained; conventional; thermal; preferably; stirling; carnot; liquid; initial; concentration; contained; variable; volume; connected; superleak; device; enables; free; passage; restricting; compressed; concentrated; expanded; diluted; phased; carry; selected; remove; load; cooling; below; heat load; remove heat; heat source; single phase; thermal cycle; thermodynamic cycle; cooling below; cryogenic refrigerator; initial concentration; free passage; cycle refrigerator; /62/60/

Citation Formats

Swift, Gregory W., and Kotsubo, Vincent Y. Superfluid thermodynamic cycle refrigerator. United States: N. p., 1992. Web.
Swift, Gregory W., & Kotsubo, Vincent Y. Superfluid thermodynamic cycle refrigerator. United States.
Swift, Gregory W., and Kotsubo, Vincent Y. Wed . "Superfluid thermodynamic cycle refrigerator". United States. https://www.osti.gov/servlets/purl/868601.
@article{osti_868601,
title = {Superfluid thermodynamic cycle refrigerator},
author = {Swift, Gregory W. and Kotsubo, Vincent Y.},
abstractNote = {A cryogenic refrigerator cools a heat source by cyclically concentrating and diluting the amount of .sup.3 He in a single phase .sup.3 He-.sup.4 He solution. The .sup.3 He in superfluid .sup.4 He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid .sup.3 He at an initial concentration in superfluid .sup.4 He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of .sup.4 He while restricting passage of .sup.3 He. The .sup.3 He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

Patent:

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