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Regenerative effect of heat exchanger in pulse tube refrigerator.

Author(s) : GUO Z., ZHU S.

Type of article: IJR article

Summary

The heat exchanger is an important component of pulse tube refrigerators (PTRs). The heat transfer in a cold heat exchanger under periodic unsteady flow is studied with the CFD method. The basic heat transfer mechanism has been explained, including the local heat transfer coefficient, heat flux, the temperature distribution of the narrow tube, and the relation between the Nusselt number and the Reynolds number. The regenerative effect of the cold heat exchanger of PTRs has been presented. The cold heat exchanger is cooled down by the low temperature gas due to the oscillating flow, and a temperature gradient is formed inside gradually. The regenerative effect will decrease the expansion work of the PTRs and lower the efficiency of the system, especially under bigger pressure ratio conditions.

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Pages: 114-120

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Details

  • Original title: Regenerative effect of heat exchanger in pulse tube refrigerator.
  • Record ID : 30027702
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 118
  • Publication date: 2020/10
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2020.04.016

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