Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Condensing heat transfer characteristics of hydrocarbon refrigerants in a horizontal tube

탄화수소 냉매의 수평 원관내 응축열전달 특성

  • 장영수 (서울대학교 대학원 기계공학과) ;
  • 김민수 (서울대학교 공과대학 기계공학과) ;
  • 노승탁 (서울대학교 공과대학 기계공학과)
  • Published : 1997.12.01
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Abstract

Condensing heat transfer characteristics of hydrocarbon refrigerants are experimentally investigated. Single component hydrocarbon refrigerants (propane, isobutane, butane and propylene) and binary mixtures of propane/isobutane and propane/butane are considered as test fluids. Local condensing heat transfer coefficients of selected refrigerants are obtained from overall conductance measurement. Average heat transfer coefficients at different mass fluxes and heat transfer rates are shown and compared with those of R22. Pure hydrocarbon refrigerants have higher values of heat transfer coefficient than R22. It is also found that there is a heat transfer degradation for hydrocarbon mixtures due to composition variation during condensation. Measured condensing heat transfer coefficients are compared with predicted values by available correlations. An empirical correlation for pure and mixed hydrocarbon is developed, and it shows good agreement with experimental data.

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References

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