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Title:
ACOUSTIC POWER TRANSMITTING UNIT FOR THERMOACOUSTIC SYSTEMS
Document Type and Number:
WIPO Patent Application WO/2005/108768
Kind Code:
A1
Abstract:
The invention relates to an acoustic power transmitting unit for thermoacoustic systems comprising at least on stage ptovided with at least two thermoacoustic units (3, 4, 12-16) each of which comprises a regenerator or a stack and two heat exchangers, an acoustic resonator comprising a tube and containing a fluid and in which a magnetic field consisting of high impedance and low-impedance areas is arranged, wherein certain thermoacoustic units (3, 4, 12-16) are placed in high dimensionless impedance areas. According to said invention, each high dimensionless impedance area also comprises a thermoacoustic unit, wherein two successive thermoacoustic units (3, 4, 12-16) are always separated by low dimensionless impedance. The resonator comprises a reduced diameter section (5, 21-23) between each couple of successive thermoacoustic units (3, 4, 12-16) and each cross-sectional narrowing (5, 21-23) is associated with at least one by-pass (6,7) which comprises a deviation cavity (10, 11) and makes it possible to deviate the major part of a volume flow rate.

Inventors:
BRETAGNE EMMANUEL (FR)
FRANCOIS MAURICE-XAVIER (FR)
Application Number:
PCT/FR2005/050299
Publication Date:
November 17, 2005
Filing Date:
May 03, 2005
Export Citation:
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Assignee:
UNIV PARIS CURIE (FR)
CENTRE NAT RECH SCIENT (FR)
BRETAGNE EMMANUEL (FR)
FRANCOIS MAURICE-XAVIER (FR)
International Classes:
F02G1/043; F25B9/14; (IPC1-7): F02G1/043
Foreign References:
US6658862B22003-12-09
US5349813A1994-09-27
US5489202A1996-02-06
US6578364B22003-06-17
GB1252258A1971-11-03
US6021643A2000-02-08
Other References:
OLSON J R ET AL: "A LOADED THERMOACOUSTIC ENGINE", JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 98, no. 5, PART 1, 1 November 1995 (1995-11-01), pages 2690 - 2693, XP000540128, ISSN: 0001-4966
Attorney, Agent or Firm:
Michelet, Alain (7 rue de Madrid, Paris, FR)
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