Reflux condensation of pure vapors with and without a noncondensable gas inside plain and enhanced tubes

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Estimates of the surface-area and vapor-release reductions are obtained when commercially available enhanced tubes (spirally ribbed) replace plain tubes in a reflux unit condensing pure organic vapors with different concentrations of a noncondensable gas. This investigation was undertaken because there are no existing data and/or prediction methods that are applicable for these shell-and-tube condensers commonly used in the process industries. To obtain these estimates, existing design methods published in the open literature were used. The major findings are that (1) surface-area reductions can almost approach the single-phase heat transfer enhancement level, and (2) vapor-release reductions can approach a factor of ... continued below

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6 p.

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Abdelmessih, A.N.; Rabas, T.J. & Panchal, C.B. June 1, 1997.

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Description

Estimates of the surface-area and vapor-release reductions are obtained when commercially available enhanced tubes (spirally ribbed) replace plain tubes in a reflux unit condensing pure organic vapors with different concentrations of a noncondensable gas. This investigation was undertaken because there are no existing data and/or prediction methods that are applicable for these shell-and-tube condensers commonly used in the process industries. To obtain these estimates, existing design methods published in the open literature were used. The major findings are that (1) surface-area reductions can almost approach the single-phase heat transfer enhancement level, and (2) vapor-release reductions can approach a factor of four. The important implication is that enhanced tubes appear to be very cost effective for addressing the recovery of volatile organic vapors (VOCs), and for a vast number of different reflux-condenser applications.

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6 p.

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OSTI as DE97052881

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  • AICHE/ASME national heat transfer conference: current developments in numerical simulation of heat and mass transfer, Baltimore, MD (United States), 10-12 Aug 1997

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  • Other: DE97052881
  • Report No.: ANL/ES/CP--93172
  • Report No.: CONF-970824--6
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 493383
  • Archival Resource Key: ark:/67531/metadc676487

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • June 1, 1997

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  • July 25, 2015, 2:21 a.m.

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  • Dec. 14, 2015, 6:25 p.m.

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Abdelmessih, A.N.; Rabas, T.J. & Panchal, C.B. Reflux condensation of pure vapors with and without a noncondensable gas inside plain and enhanced tubes, article, June 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc676487/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.