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Experimental investigation of adverse effect of frost formation on microchannel evaporators.1. Effect of fin geometry and environmental effects.

Author(s) : MOALLEM E., HONG T., CREMASCHI L., et al.

Type of article: Article, IJR article

Summary

This study experimentally investigated the frost growth on louvered folded fins in microchannel heat exchangers when used in outdoor air-source heat pump systems. The effects of surface temperature, fin geometries, and air environmental conditions were studied. The overall aim was to isolate and quantify the effect of geometry from surface temperature effects. Experimental data of frost weight, local frost thickness, air pressure drop across the coils, time of frost–defrost cycles and heat transfer rates were recorded. Data showed that the frosting time and the frost growth rates depended mainly on the local fin surface temperature. Lower fin density was beneficial because it delayed the blockage of the air flow. The fin length and fin depth had minor effects on frosting performance. The air humidity had a fairly significant effect on rate of frost formation while air velocity seemed to have a small effect on the frost growth rate.

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Pages: 1762-1775

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Details

  • Original title: Experimental investigation of adverse effect of frost formation on microchannel evaporators.1. Effect of fin geometry and environmental effects.
  • Record ID : 30008707
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 6
  • Publication date: 2013/09

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