Measured chromium distributions resulting from cooling tower drift

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Useful data concerning the distribution of drift from a mechanical draft cooling tower were derived from field measurements despite the non-ideal conditions which were encountered. Observed chromium fluxes ranged from about 1 mg (m/sup 2/hr)/sup -1/ at a distance of 30 m from the tower to about 1% of that value at a kilometer. Air concentrations of chromium were fairly constant at about 50 ng m/sup -3/ to a distance of about 200 m downwind of the tower, apparently due to thorough mixing in the wake of the tower and a lack of lateral dilution of the effiuent from a ... continued below

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Pages: 22

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Alkezweeny, A.J.; Glover, D.W.; Lee, R.N.; Sloot, J.W. & Wolf, M.A. January 1, 1973.

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Useful data concerning the distribution of drift from a mechanical draft cooling tower were derived from field measurements despite the non-ideal conditions which were encountered. Observed chromium fluxes ranged from about 1 mg (m/sup 2/hr)/sup -1/ at a distance of 30 m from the tower to about 1% of that value at a kilometer. Air concentrations of chromium were fairly constant at about 50 ng m/sup -3/ to a distance of about 200 m downwind of the tower, apparently due to thorough mixing in the wake of the tower and a lack of lateral dilution of the effiuent from a crosswind line source. A simplified droplet trajectory model appears capable of estimating drift deposition flux within an order of magnitude. Neither that model nor the experimental data are sufficiently detailed to permit definitive assessment of cooling tower drift. The proper assessment of cooling tower drift deposition for general application would require a comprehensive investigation centered on an isolated cooling lower whose operational characteristics are well-defined and subject ulo cont rol. Documentation of the drift droplet spectrum and properties of the buoyant plume and the adjacent atmosphere are essential to such an effont. (auth)

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Pages: 22

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  • Symposium on cooling tower environment - 1974, College Park, Maryland, USA, 4 Mar 1974

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  • Report No.: BNWL-SA--4919
  • Report No.: CONF-740302--1
  • Grant Number: AT(45-1)-1830
  • Office of Scientific & Technical Information Report Number: 4327025
  • Archival Resource Key: ark:/67531/metadc1023644

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  • January 1, 1973

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  • Oct. 15, 2017, 10:09 p.m.

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  • Oct. 30, 2017, 10:14 p.m.

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Alkezweeny, A.J.; Glover, D.W.; Lee, R.N.; Sloot, J.W. & Wolf, M.A. Measured chromium distributions resulting from cooling tower drift, article, January 1, 1973; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1023644/: accessed March 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.