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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Numerical Study for the Effect of Expansion Device on the Performance of the $CO_2$ Cycle

이산화탄소 사이클에서 팽창장치의 영향에 관한 수치적 연구

  • 김무근 (인제대학교 기계자동차공학부) ;
  • 김욱중 (한국기계연구원 열유체환경연구부) ;
  • 김유진 (인제대학교 기계자동차공학부)
  • Published : 2004.01.01
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Abstract

In order to evaluate the performance of carbon dioxide cycle, a simulation model was developed to predict the steady state performance of $CO_2$ transcritical cycle. The expansion process is treated as an isenthalpic throttling process or isentropic expansion process. The mathematical model is based entirely on the basic energy conservation law and thermodynamic and transport properties of $CO_2$. A Parametric study has been conducted in order to investigate the effect of isentropic efficiency of expansion turbine and various operating conditions on the cycle performance. An optimal heat rejection pressure existed for the given evaporating temperature and outlet temperature of gas cooler.

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References

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