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Title: Measured chromium distributions resulting from cooling tower drift

Abstract

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)

Authors:
; ; ; ;
Publication Date:
Research Org.:
Battelle Pacific Northwest Labs., Richland, Wash. (USA)
OSTI Identifier:
4327025
Report Number(s):
BNWL-SA-4919; CONF-740302-1
NSA Number:
NSA-29-029418
DOE Contract Number:  
AT(45-1)-1830
Resource Type:
Conference
Resource Relation:
Conference: Symposium on cooling tower environment - 1974, College Park, Maryland, USA, 4 Mar 1974; Other Information: Orig. Receipt Date: 30-JUN-74
Country of Publication:
United States
Language:
English
Subject:
N44700* -Environmental & Earth Sciences-Chemical Effluents; *CHROMIUM- DISTRIBUTION; *COOLING TOWERS; ABSORPTION SPECTROSCOPY; AIR; DROPLETS; PLUMES

Citation Formats

Alkezweeny, A J, Glover, D W, Lee, R N, Sloot, J W, and Wolf, M A. Measured chromium distributions resulting from cooling tower drift. United States: N. p., 1973. Web.
Alkezweeny, A J, Glover, D W, Lee, R N, Sloot, J W, & Wolf, M A. Measured chromium distributions resulting from cooling tower drift. United States.
Alkezweeny, A J, Glover, D W, Lee, R N, Sloot, J W, and Wolf, M A. 1973. "Measured chromium distributions resulting from cooling tower drift". United States. https://www.osti.gov/servlets/purl/4327025.
@article{osti_4327025,
title = {Measured chromium distributions resulting from cooling tower drift},
author = {Alkezweeny, A J and Glover, D W and Lee, R N and Sloot, J W and Wolf, M A},
abstractNote = {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)},
doi = {},
url = {https://www.osti.gov/biblio/4327025}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1973},
month = {1}
}

Conference:
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