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An experimental investigation of heat transfer and friction losses of interrupted and wavy fins for fin-and-tube heat exchangers.

Author(s) : LOZZA G., MERLO U.

Type of article: Article, IJR article

Summary

The paper discusses the results of an extensive investigation about the performance of various fin configurations, carried out in the Luve Contardo experimental facilities and aimed to enhance the heat transfer capabilities of air-cooled condensers and liquid coolers. Test results are relative to 15 coil prototypes, having the same tube and fin geometry, but different fin surface geometry, from flat to wavy to louvered to "winglet". Different rates of heat transfer and pressure loss enhancement were obtained, also depending on the quality of the pressing process. General approaches to evaluate the "goodness" of one fin design with respect to another one provided questionable results: pressure loss influence on the air flow cannot be properly evaluated unless the actual fan head curve and the coil dimensions (front area and rows number) are stipulated. The performance of air-cooled condensers was therefore predicted and compared, for various fin design and for coil arrangements of practical interest. The type of fin adopted strongly influences the heat exchanger performance and louvered fins generally provide the best results.

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Pages: 409-416

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Details

  • Original title: An experimental investigation of heat transfer and friction losses of interrupted and wavy fins for fin-and-tube heat exchangers.
  • Record ID : 2001-2681
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 24 - n. 5
  • Publication date: 2001/08

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