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Title: Thermoacoustic refrigerator

Abstract

A thermoacoustic device having a thermal stack made from a piece of porous material which provides a desirable ratio of thermoacoustic area to viscous area, which has a low resistance to flow, which minimizes acoustic streaming and which has a high specific heat and low thermal conductivity is disclosed. The thermal stack is easy and cheap to form and it can be formed in small sizes. Specifically, in one embodiment, a thermal stack which is formed by the natural structure of a porous material such as reticulated vitreous carbon is disclosed. The thermal stack is formed by machining a block of reticulated vitreous carbon into the required shape of the thermal stack. In a second embodiment, a micro-thermoacoustic device is disclosed which includes a thermal stack made of a piece of porous material such as reticulated vitreous carbon. In another embodiment, a heat exchanger is disclosed which is formed of a block of heat conductive open cell foam material.

Inventors:
 [1]
  1. San Mateo, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
871165
Patent Number(s):
5673561
Assignee:
Regents of University of California (Oakland, CA)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
thermoacoustic; refrigerator; device; thermal; stack; piece; porous; material; provides; desirable; ratio; viscous; resistance; flow; minimizes; acoustic; streaming; specific; heat; conductivity; disclosed; easy; cheap; form; formed; sizes; specifically; embodiment; natural; structure; reticulated; vitreous; carbon; machining; block; required; shape; micro-thermoacoustic; exchanger; conductive; cell; foam; vitreous carbon; specific heat; cell foam; foam material; porous material; thermal conductivity; heat exchange; heat exchanger; heat conductive; acoustic refrigerator; /62/

Citation Formats

Moss, William C. Thermoacoustic refrigerator. United States: N. p., 1997. Web.
Moss, William C. Thermoacoustic refrigerator. United States.
Moss, William C. Wed . "Thermoacoustic refrigerator". United States. https://www.osti.gov/servlets/purl/871165.
@article{osti_871165,
title = {Thermoacoustic refrigerator},
author = {Moss, William C},
abstractNote = {A thermoacoustic device having a thermal stack made from a piece of porous material which provides a desirable ratio of thermoacoustic area to viscous area, which has a low resistance to flow, which minimizes acoustic streaming and which has a high specific heat and low thermal conductivity is disclosed. The thermal stack is easy and cheap to form and it can be formed in small sizes. Specifically, in one embodiment, a thermal stack which is formed by the natural structure of a porous material such as reticulated vitreous carbon is disclosed. The thermal stack is formed by machining a block of reticulated vitreous carbon into the required shape of the thermal stack. In a second embodiment, a micro-thermoacoustic device is disclosed which includes a thermal stack made of a piece of porous material such as reticulated vitreous carbon. In another embodiment, a heat exchanger is disclosed which is formed of a block of heat conductive open cell foam material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}

Patent:

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