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Experimental investigation of thermal contact resistance in plain-fin-and-tube evaporators with collarless fins.

Author(s) : ELSHERBINI A. I., JACOBI A. M., HRNJAK P. S.

Type of article: Article, IJR article

Summary

The authors investigated the thermal contact resistance between fins and tubes in a plain-fin heat exchanger. The test coils had aluminium fins and tubes with no fin-collars. The heat-exchanger configuration under investigation was selected because this fin-tube joint is commonly used in refrigeration applications. Two coils were examined: one in the as-manufactured condition, and the other with brazed fin tube joints providing an intimate, metallurgical bond between fins and tubes. Both heat exchangers were examined under dry and frosting conditions. The results showed significant contact resistance in the production heat exchanger when operating under dry conditions. When frost was formed on the surface, the contact resistance was dramatically reduced to an insignificant value.

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Pages: 527-536

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Details

  • Original title: Experimental investigation of thermal contact resistance in plain-fin-and-tube evaporators with collarless fins.
  • Record ID : 2003-2168
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 26 - n. 5
  • Publication date: 2003/08

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