发明授权
- 专利标题: Acoustic cooling engine
- 专利标题(中): 声冷却发动机
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申请号: US942049申请日: 1986-12-16
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公开(公告)号: US4722201A公开(公告)日: 1988-02-02
- 发明人: Thomas J. Hofler , John C. Wheatley , Gregory W. Swift , Albert Migliori
- 申请人: Thomas J. Hofler , John C. Wheatley , Gregory W. Swift , Albert Migliori
- 申请人地址: DC Washington
- 专利权人: The United States of America as represented by the United States Department of Energy
- 当前专利权人: The United States of America as represented by the United States Department of Energy
- 当前专利权人地址: DC Washington
- 主分类号: F25B9/14
- IPC分类号: F25B9/14 ; F25B9/00
摘要:
An acoustic cooling engine with improved thermal performance and reduced internal losses comprises a compressible fluid contained in a resonant pressure vessel. The fluid has a substantial thermal expansion coefficient and is capable of supporting an acoustic standing wave. A thermodynamic element has first and second ends and is located in the resonant pressure vessel in thermal communication with the fluid. The thermal response of the thermodynamic element to the acoustic standing wave pumps heat from the second end to the first end. The thermodynamic element permits substantial flow of the fluid through the thermodynamic element. An acoustic driver cyclically drives the fluid with an acoustic standing wave. The driver is at a location of maximum acoustic impedance in the resonant pressure vessel and proximate the first end of the thermodynamic element. A hot heat exchanger is adjacent to and in thermal communication with the first end of the thermodynamic element. The hot heat exchanger conducts heat from the first end to portions of the resonant pressure vessel proximate the hot heat exchanger. The hot heat exchanger permits substantial flow of the fluid through the hot heat exchanger. The resonant pressure vessel can include a housing less than one quarter wavelength in length coupled to a reservoir. The housing can include a reduced diameter portion communicating with the reservoir. The frequency of the acoustic driver can be continuously controlled so as to maintain resonance.
公开/授权文献
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