Spray cooling heat-transfer with subcooled trichlorotrifluoroethane (Freon-113) for vertical constant heat flux surfaces

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Experiments were done using subcooled Freon-113 sprayed vertically downward. Local and average heat transfers were investigated fro Freon-113 sprays with 40 C subcooling, droplet sizes 200-1250{mu}m, and droplet breakup velocities 5-29 m/s. Full-cone type nozzles were used to generate the spray. Test assemblies consisted of 1 to 6 7.62 cm vertical constant heat flux surfaces parallel with each other and aligned horizontally. Distance between heated surfaces was varied from 6.35 to 76.2 mm. Steady state heat fluxes as high as 13 W/cm{sup 2} were achieved. Dependence on the surface distance from axial centerline of the spray was found. For surfaces ... continued below

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23 p.

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Kendall, C. M. & Holman, J. P. June 6, 1996.

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  • Kendall, C. M. Lawrence Livermore National Lab., CA (United States)
  • Holman, J. P. Southern Methodist Univ., Dallas, TX (United States). Dept. of Mechanical Engineering

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Description

Experiments were done using subcooled Freon-113 sprayed vertically downward. Local and average heat transfers were investigated fro Freon-113 sprays with 40 C subcooling, droplet sizes 200-1250{mu}m, and droplet breakup velocities 5-29 m/s. Full-cone type nozzles were used to generate the spray. Test assemblies consisted of 1 to 6 7.62 cm vertical constant heat flux surfaces parallel with each other and aligned horizontally. Distance between heated surfaces was varied from 6.35 to 76.2 mm. Steady state heat fluxes as high as 13 W/cm{sup 2} were achieved. Dependence on the surface distance from axial centerline of the spray was found. For surfaces sufficiently removed from centerline, local and average heat transfers were identical and correlated by a power relation of the form seen for normal-impact sprays which involves the Weber number, a nondimensionalized temperature difference, and a mass flux parameter. For surfaces closer to centerline, the local heat transfer depended on vertical location on the surface while the average heat transfer was described by a semi-log correlation involving the same parameters. The heat transfer was independent of the distance (gap) between the heated surfaces for the gaps investigated.

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23 p.

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OSTI as DE96050337

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  • 1996 international mechanical engineering congress and exhibition, Atlanta, GA (United States), 17-22 Nov 1996

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  • Other: DE96050337
  • Report No.: UCRL-JC--122507
  • Report No.: CONF-961105--9
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 378976
  • Archival Resource Key: ark:/67531/metadc688598

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  • June 6, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • June 24, 2016, 1:47 p.m.

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Kendall, C. M. & Holman, J. P. Spray cooling heat-transfer with subcooled trichlorotrifluoroethane (Freon-113) for vertical constant heat flux surfaces, article, June 6, 1996; California. (digital.library.unt.edu/ark:/67531/metadc688598/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.