Evaporation heat transfer characteristics of R-410A in 7 and 9.52 mm smooth/micro-fin tubes

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Abstract

In-tube evaporation heat transfer characteristics of R-410A were experimentally investigated and analyzed as a function of evaporating temperature, mass flux, heat flux, and tube geometry. Evaporation heat transfer coefficients and pressure drops were measured for 3.0 m long smooth and micro-fin tubes with outer diameters of 9.52 and 7.0 mm, respectively. The test matrix in the present study included measurements for evaporation over a refrigerant mass flux range of 70-211 kg/m2s, a heat flux range of 5-15 kW/m2 and an evaporating temperature range of -15 to 5. The objective of this study is to evaluate the heat transfer enhancement of the micro-fin tube with R-410A as a function of mass flux, heat flux, evaporating temperature and tube diameter.

Original languageEnglish
Pages (from-to)716-730
Number of pages15
JournalInternational Journal of Refrigeration
Volume25
Issue number6
DOIs
Publication statusPublished - 2002 Sep

Keywords

  • Enhancement
  • Evaporation
  • Heat transfer
  • Mass transfer
  • Measurement
  • R410A
  • Smooth tube
  • Study

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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