Acoustic impedance characteristics of linear compressors

The acoustic field of a linear compressor serves to deliver the compression work to the load, such as the connected cold head ofa cryocooler; it plays an equivalently important role as the electrical and mechanical parts, especially in the imped- ance match issue. This paper studies the acoustic imp...

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Bibliographic Details
Published in:Journal of Zhejiang University. A. Science 2013-07, Vol.14 (7), p.494-503
Main Authors: Gan, Zhi-hua, Wang, Long-yi, Zhao, Sheng-ying, Song, Yu-jing, Wang, Wei-wei, Wu, Yi-nong
Format: Article
Language:English
Subjects:
Acoustic impedance
Acoustics
Adjustable
Civil Engineering
Classical and Continuum Physics
Compressors
Electric power generation
Engineering
Impedance
Industrial Chemistry/Chemical Engineering
Mechanical Engineering
Optimization
Thermoacoustics
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Summary:The acoustic field of a linear compressor serves to deliver the compression work to the load, such as the connected cold head ofa cryocooler; it plays an equivalently important role as the electrical and mechanical parts, especially in the imped- ance match issue. This paper studies the acoustic impedance characteristics of a linear compressor. The parameters including the current, the piston displacement, the pressure amplitude, the electrical power dissipation, the power factor, the pressure-volumetric （PV） power delivered, and the efficiency are theoretically and experimentally investigated. Different from previous theoretical studies, optimization for the operations away from the resonance is also included. More general optimization results imply rele- vance between thermoacoustic engines and linear compressors. The predicted results are validated by the experiments performed on a linear compressor with an adjustable resistive-capacitive （RC） acoustic load. The comparisons between the calculations and the measurements are presented and analyzed. The results provide deeper insight into the mechanism of the linear compressor and the impedance match in a cryocooler system.
ISSN:1673-565X
1862-1775
DOI:10.1631/jzus.A1300113