Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Thermal Performance Analysis of Circular Coil Type Internal Heat Exchanger for Transcritical $CO_2$ System

천임계 $CO_2$ 시스템용 코일형 내부 열교환기의 열성능 해석

  • 박병규 (한국기계연구원 열유체환경연구부) ;
  • 김근오 (한국기계연구원 열유체환경연구) ;
  • 김무근 (인제대학교 기계자동차공학부)
  • Published : 2002.07.01
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Abstract

Transcritical$CO_2$ systems are under consideration for use as residential/mobile air conditioners. In these systems, an internal heat exchanger is usually adopted to improve both capacity and/or COP of the $CO_2$ system in lower operating pressure range of gas cooler. A program has been developed to analyse the performance of internal heat exchangers using the section-by-section method. The internal heat exchanger of coaxial configuration is first analyzed and fairly good agreements with the data are obtained, And then the internal heat exchanger of multiple circular coil configuration has been investigated. The results obtained from the parametric study provide the guidelines for the initial design and manufacturing concepts of the internal heat exchanger in transcritical $CO_2$ system. Further studies are necessary to develop the heat transfer correlations of carbon dioxide in the tubes to obtain more accurate results.

Keywords

References

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