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Effect of inclination angle on the air-side performance of aluminium parallel flow heat exchangers under wet conditions.

Author(s) : KIM N. H., KIM D. Y., CHOI Y. M., et al.

Summary

The effect of inclination angle on the heat transfer and pressure drop characteristics of brazed aluminium heat exchangers is experimentally investigated under wet conditions. Three samples having different fin pitches (1.25, 1.5 and 2.0 mm) were tested. Results show that heat transfer coefficients are not affected by the inclination angle. However, friction factors increase as the inclination angle increases with negligible difference between the forward and backward inclination. The effect of fin pitch on the heat transfer coefficient and on the pressure drop is also discussed. Comparison of the dry and wet surface heat transfer coefficients reveals that dry surface heat transfer coefficients are significantly larger than wet surface heat transfer coefficients. Possible explanation is provided considering the condensate drainage pattern.

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Details

  • Original title: Effect of inclination angle on the air-side performance of aluminium parallel flow heat exchangers under wet conditions.
  • Record ID : 2009-1472
  • Languages: English
  • Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2008/07/14

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