Thermoacoustic refrigerator

Details Thermoacoustic refrigerator Thermoacoustic refrigerator

1996-08-12

1997-10-07

Capossela, Ronald C.

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

62467, F25B 900

Patent

active

056735618

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.

REFERENCES:
patent: 4825667 (1989-05-01), Benedict et al.
patent: 5101894 (1992-04-01), Hendricks
patent: 5295355 (1994-03-01), Zhou et al.
patent: 5456082 (1995-10-01), Keolian et al.

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