열교환기 휜에서의 서리층 두께와 서리층 표면온도의 실험 상관식

Empirical Correlations of Frost Thickness and Frost Surface Temperature on Heat Exchanger Fin

  • Kim, Kyoung-Min (School of Mechanical Engineering, Hanyang University) ;
  • Kim, Jung-Soo (School of Mechanical Engineering, Hanyang University) ;
  • Kim, Jang-Hyun (School of Mechanical Engineering, Hanyang University) ;
  • Lee, Kwan-Soo (School of Mechanical Engineering, Hanyang University)
  • 발행 : 2009.06.25

초록

In this study, dimensionless correlations of frost properties (i.e. the thickness and surface temperature of frost) on heat exchanger fin with nonuniform temperature distribution are proposed from frosting experiments. We analyzed the local fin temperature distribution, frost thickness and frost surface temperature on a 2D fin; in the airflow direction and the direction perpendicular to airflow. As a result, the frost growth on the fin had a close relation with fin heat conduction. The dimensionless correlations for the average frost properties were expressed as a function of dimensionless temperature, humidity ratio, Reynolds number, and Fourier number. These correlations agreed well with experimental data with the error less than 14%.

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