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

  • 제14권1호
  • /
  • Pages.38-45
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  • 2002
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

이산화탄소의 증발열전달 특성에 관한 실험적 연구

An Experimental Study on the Characteristics of Evaporative Heat Transfer of Carbon Dioxide

  • 조은석 (서울대학교 기계항공공학부) ;
  • 윤석호 (서울대학교 기계항공공학부) ;
  • 김민수 (서울대학교 기계항공공학부)
  • 발행 : 2002.01.01
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초록

Evaporative heat transfer characteristics of carbon dioxide have been investi- gated by experiment. The experiments have been carried out for a seamless stainless steel tube of the outer diameter of 9.55 mm, the inner diameter of 7.75 mm and the length of 5.0 m. Direct heating method was used for supplying heat to the refrigerant where the test tube was uniformly heated by electric current which was applied to the tube wall. Experiments were conducted with$CO_2$of purity 99.99% at saturation temperatures of 0.0 to 10.5$^{\circ}C$, heat fluxes of 12 to 27kW/$m^2$s and mass fluxes of 212 to 530 kg/$m^2$s. The heat transfer coefficients of $CO_2$are decreased as the vapor quality increases and these phenomena are explained by dimensionless Weber and Bond numbers. The heat transfer coefficients of$CO_2$increase when the heat and mass fluxes increase, and the saturation temperature effects are minor in the test range of this study. The present experimental data are compared with six renowned correlations with root-mean-squared deviations ranging from 23.0 to 94.9% respectively.

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참고문헌

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