Enhancing Condensers for Geothermal Systems: the Effect of High Contact Angles on Dropwise Condensation Heat Transfer

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Phase change heat transfer is notorious for increasing the irreversibility of, and therefore decreasing the efficiency of, geothermal power plants. Its significant contribution to the overall irreversibility of the plant makes it the most important source of inefficiency in the process. Recent studies here have shown the promotion of drop wise condensation in the lab by means of increasing the surface energy density of a tube with nanotechnology. The use of nanotechnology has allowed the creation of surface treatments which discourage water from wetting a tube surface during a static test. These surface treatments are unique in that they create ... continued below

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Kennedy, John M.; Kim, Sunwoo & Kim, Kwang J. October 6, 2009.

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Phase change heat transfer is notorious for increasing the irreversibility of, and therefore decreasing the efficiency of, geothermal power plants. Its significant contribution to the overall irreversibility of the plant makes it the most important source of inefficiency in the process. Recent studies here have shown the promotion of drop wise condensation in the lab by means of increasing the surface energy density of a tube with nanotechnology. The use of nanotechnology has allowed the creation of surface treatments which discourage water from wetting a tube surface during a static test. These surface treatments are unique in that they create high- contact angles on the condensing tube surfaces to promote drop wise condensation.

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Poster presented at Geothermal Resources Council's 33rd Annual Meeting October 4-7, 2009 Peppermill Resort Reno, Nevada USA http://www.geothermal.org/

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  • Report No.: DOE/GO/NIREC-01
  • Grant Number: FG36-08GO88161
  • Office of Scientific & Technical Information Report Number: 965974
  • Archival Resource Key: ark:/67531/metadc926112

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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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  • October 6, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 23, 2016, 6:49 p.m.

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Kennedy, John M.; Kim, Sunwoo & Kim, Kwang J. Enhancing Condensers for Geothermal Systems: the Effect of High Contact Angles on Dropwise Condensation Heat Transfer, text, October 6, 2009; United States. (digital.library.unt.edu/ark:/67531/metadc926112/: accessed May 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.