Condensation heat transfer characteristics of hydrocarbon. refrigerants inside horizontal tubes

수평평활관내 탄화수소계 냉매의 응축전열 특성에 관한 연구

  • 이용언 (부경대학교 대학원 냉동공학과) ;
  • 박승준 (부경대학교 대학원 냉동공학과) ;
  • 정진호 (LG전자 냉장고 사업부) ;
  • 장승환 ((주)Century 기술연구소 공냉개발팀) ;
  • 오후규 (부경대학교 기계공학부)
  • Published : 2001.11.01

Abstract

This study investigated the condensation heat transfer coefficients of R-22, R-290 and R-600a inside horizontal tube. Heat transfer measurements were peformed for smooth tube with outside diameter of 12.7 mm Condensation temperatures and mass velocity were ranged from 308 K to 323 K and $51kg/\textrm{m}^2s$s to $250kg/\textrm{m}^2s$, respectively. The test results showed that the local condensation heat transfer coefficients increased as the mass flux increased, and also the effects of mass velocity on heat transfer coefficients of R-290 and R-600a were less than R-22. Average condensation heat transfer coefficients of natural refrigerants were superior to that of R-22. The present results had a good agreement with Haraguchi's correlation.

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