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Improving two-phase refrigerant distribution in the manifold of the refrigeration system.

Author(s) : WEN M. Y., LEE C. H., TASI J. C.

Type of article: Article

Summary

This study presents an experimental investigation to improve the two-phase refrigerant distribution in the manifold of the refrigeration (R-134a) system. The tests were conducted at the nominal inlet pressure of 173.5 kPa and mass flux of 130-145 kg/m2.s. Three different distributor configurations (Venturi tube connected with a smooth tube, Venturi tube connected with an internally-spirally micro-finned tube, and distributor within a roller) were selected. In the experiment, the effects of the outer-wall temperatures and pressures of the exits in the manifold, the cooling capacity (C) and COP on two-phase flow distribution for the present study were displayed and discussed. In order to understand that flow distribution of two-phase refrigerant in the manifold, the flow visualization at the exit manifold of the distributor was made. It was found that the Venturi tube connected with the internally-spirally micro-finned tube got the best distribution efficiency, and resulted in the best COP. [Reprinted with permission from Elsevier. Copyright, 2007].

Details

  • Original title: Improving two-phase refrigerant distribution in the manifold of the refrigeration system.
  • Record ID : 2009-0584
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 28 - n. 16
  • Publication date: 2008/11

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