Condensation in a two-phase pool

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We consider the case of vapor condensation in a liquid pool, when the heat transfer is controlled by heat losses through the walls. The analysis is based on drift flux theory for phase separation in the pool, and determines the two-phase mixture height for the pool. To our knowledge this is the first analytical treatment of this classic problem that gives an explicit result, previous work having established the result for the evaporative case. From conservation of mass and energy in a one-dimensional steady flow, together with a void relation between the liquid and vapor fluxes, we determine the increase ... continued below

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9 p.

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Duffey, R. B. & Hughes, E. D. December 31, 1991.

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  • Duffey, R. B. Brookhaven National Lab., Upton, NY (United States)
  • Hughes, E. D. EG and G Idaho, Inc., Idaho Falls, ID (United States)

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Description

We consider the case of vapor condensation in a liquid pool, when the heat transfer is controlled by heat losses through the walls. The analysis is based on drift flux theory for phase separation in the pool, and determines the two-phase mixture height for the pool. To our knowledge this is the first analytical treatment of this classic problem that gives an explicit result, previous work having established the result for the evaporative case. From conservation of mass and energy in a one-dimensional steady flow, together with a void relation between the liquid and vapor fluxes, we determine the increase in the mixture level from the base level of the pool. It can be seen that the thermal and hydrodynamic influences are separable. Thus, the thermal influence of the wall heat transfer appears through its effect on the condensing length L*, so that at high condensation rates the pool is all liquid, and at low rates overflows (the level swell or foaming effect). Similarly, the phase separation effect hydrodynamically determines the height via the relative velocity of the mixture to the entering flux. We examine some practical applications of this result to level swell in condensing flows, and also examine some limits in ideal cases.

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9 p.

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OSTI; NTIS; INIS; GPO Dep.

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  • 1. European thermal sciences conference and 3rd UK national heat transfer conference,Birmingham (United Kingdom),16-18 Sep 1992

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  • Other: DE92010048
  • Report No.: BNL--47120
  • Report No.: CONF-920928--1
  • Grant Number: AC02-76CH00016
  • Grant Number: AC07-76ID01570
  • Office of Scientific & Technical Information Report Number: 10134073
  • Archival Resource Key: ark:/67531/metadc1319147

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 31, 1991

Added to The UNT Digital Library

  • Nov. 3, 2018, 11:47 a.m.

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  • Nov. 6, 2018, 5:24 p.m.

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Duffey, R. B. & Hughes, E. D. Condensation in a two-phase pool, article, December 31, 1991; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc1319147/: accessed May 27, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.