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Two-phase pressure drop of CO2, ammonia and R-245fa in multiport aluminium microchannel tubes.

Author(s) : ADAMS D. C., BURR J., HRNJAK P., et al.

Summary

An experimental investigation of adiabatic, two-phase, frictional pressure drop was conducted using 6-port and 14-port microchannels with hydraulic diameters of 1.54 and 1.02 mm, respectively. Two-phase fluid flow conditions include mass fluxes from 50 to 440 kg/s.m2, qualities between 0 and 1, and saturation temperatures for working fluids carbon dioxide at 15°C, ammonia at 35°C, and R-245fa at 40°C. Experimentation indicates that two-phase pressure drop is dependent upon the average kinetic energy density of the flow, hydraulic diameter, and friction factor, allowing the single-phase pressure drop equation with a modified homogeneous fluid density to predict two-phase pressure drop.

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Details

  • Original title: Two-phase pressure drop of CO2, ammonia and R-245fa in multiport aluminium microchannel tubes.
  • Record ID : 2007-1485
  • Languages: English
  • Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2006/07/17

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