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Dropwise and filmwise condensation of water vapor on gold
Author(s) -
Wilkins David G.,
Bromley Leroy A.,
Read Stanley M.
Publication year - 1973
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690190117
Subject(s) - condensation , tube (container) , materials science , silane , seawater , heat transfer coefficient , chemistry , heat transfer , analytical chemistry (journal) , thermodynamics , composite material , organic chemistry , physics , geology , oceanography
A pure gold tube was found to give filmwise condensation in the absense of organic contamination in a flow sitution simulating that found in seawater conversion plants. A sensitive test for the presence of organic contamination has been developed. The gold tube, promoted by paraffinic thio‐silane or mercaptan, gave 100% excellent dropwise condensation. Overall heat transfer coefficients are reported for filmwise and dropwise condensation. The steamside heat transfer coefficient with dropwise condensation was estimated to be over 0.2 MW/m 2 ‐°C (35,000 B.t.u./hr‐ft 2 ‐°F) at the 95% confidence level. Gold plated tubes Supplied by P. Tomalin and S. Mulford of the Office of Saline Water, USDI. gave 95% filmwise condensation after one week of operation in a clean, once‐through system.