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Title: Thermoacoustic refrigerator

Abstract

A thermoacoustic device is described 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. 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. 13 figs.

Inventors:
Issue Date:
Research Org.:
University of California
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
541732
Patent Number(s):
5,673,561
Application Number:
PAN: 8-689,445
Assignee:
Univ. of California, Oakland, CA (United States) PTO; SCA: 420200; PA: EDB-97:141993; SN: 97001865614
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 7 Oct 1997
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; REFRIGERATORS; DESIGN; ACOUSTICS; CARBONACEOUS MATERIALS; POROUS MATERIALS; SPECIFIC HEAT; THERMAL CONDUCTIVITY; FABRICATION; HEAT TRANSFER

Citation Formats

Moss, W.C. Thermoacoustic refrigerator. United States: N. p., 1997. Web.
Moss, W.C. Thermoacoustic refrigerator. United States.
Moss, W.C. Tue . "Thermoacoustic refrigerator". United States.
@article{osti_541732,
title = {Thermoacoustic refrigerator},
author = {Moss, W.C.},
abstractNote = {A thermoacoustic device is described 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. 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. 13 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {10}
}