IIR document

Heat transfer coefficients of heat exchangers in thermoacoustic coolers.


The performance of a thermoacoustic cooler is very sensitive to heat exchanger design and performance. The volume available for heat exchange is limited since convective heat transfer between the heat exchangers and a stack is a result of oscillating particles and the particle displacements are only a few millimetres. It is necessary to estimate heat transfer coefficients between the heat exchangers and stack ends in order to predict the overall cooler performance. In the paper, the gas-side heat transfer for heat exchangers installed within a one-half wavelength standing wave thermoacoustic cooler was investigated. Dimensionless heat transfer coefficients, Colburn-j factors, were determined from the measurements and compared with different models from the literature. A new method was presented for calculation of heat transfer coefficients for oscillating flows using steady-flow heat transfer correlations.

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  • Original title: Heat transfer coefficients of heat exchangers in thermoacoustic coolers.
  • Record ID : 2004-1183
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17


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