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Heat transfer measurements and correlation of refrigerant flow boiling in tube filled with copper foam.

Author(s) : ZHU Y., HU H., SUN S., et al.

Type of article: Article, IJR article

Summary

Flow boiling heat transfer characteristics of refrigerant in tubes filled with metal foams were experimentally investigated at a saturation temperature of 7°C, mass flux from 10 to 90 kg m-2 s-1, vapor quality from 0.1 to 0.8 and heat flux from 3.1 to 18.3 kW m-2. The refrigerant is R410A. The test sections are tubes with inner diameter of 23.4 or 13.8 mm, filled with 5 or 10 PPI copper foam. The experimental results reveal that, metal foam enhances the flow boiling heat transfer by a maximum of 220% and promotes the flow pattern transition from stratified flow to stratified-wavy flow and from stratified-wavy flow to annular flow. The heat transfer coefficient decreases with vapor quality under low mass flux, while it increases with vapor quality under high mass flux. A correlation for predicting the flow boiling heat transfer was developed and it agrees well with the experimental data.

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Pages: 215-226

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Details

  • Original title: Heat transfer measurements and correlation of refrigerant flow boiling in tube filled with copper foam.
  • Record ID : 30010362
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 38
  • Publication date: 2014/02

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