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Enhanced heat transfer characteristic during nucleate pool boiling of refrigerant/oil mixture under high oil concentration conditions by metal foam.

Number: pap. ID: 192

Author(s) : HU H. T., ZHU Y., DING G. L., et al.

Summary

Nucleate pool boiling heat transfer characteristics of refrigerant/oil mixtures on metal foam covers under high oil concentration conditions were experimentally investigated. The experimented copper foams have Pore density (pores per inch) of 10 and 20, and porosity from 90 to 98%; the oil concentration varies from 0 to 40%; and heat flux varies from 30 to 130 kW/m2. The experimental results indicate that the nucleate pool boiling heat transfer coefficients on copper foam covers are larger than those on plain heating surface by a maximum of 450%; the presence of oil deteriorates the nucleate pool boiling heat transfer on copper foam covers by a maximum of 90%. A correlation for predicting the nucleate pool boiling heat transfer coefficient of refrigerant/oil mixtures on metal foam covers under high oil concentration conditions is developed, and it agrees 95% of the experimental data within a deviation of ±30%.

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Details

  • Original title: Enhanced heat transfer characteristic during nucleate pool boiling of refrigerant/oil mixture under high oil concentration conditions by metal foam.
  • Record ID : 30001623
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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