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An evaluation of water treatment technologies piloted at LANL to improve cooling tower water efficiency.

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/11214

An evaluation of water treatment technologies piloted at LANL to improve cooling tower water efficiency.

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Title: An evaluation of water treatment technologies piloted at LANL to improve cooling tower water efficiency.
Author: Vardaro-Charles, Patricia
Subject(s): LA-UR-01-1802
Evaporative cooling tower systems
Cooling tower water demand
Silica solubility
Scaling
Water treatment technologies
Fouled heat transfer surfaces
LC Subject(s): Cooling towers.
Water efficiency.
Incrustations.
Descaling.
Abstract: This paper presents an evaluation of three technologies piloted at Los Alamos National Laboratory (LANL) for improving cooling tower water efficiency. High silica content (average of 88 mg/L) in LANL source water requires frequent blow down in cooling tower systems to avoid accumulation of silica scale on heat transfer surfaces. At concentrations above 150 mg/L, silica scaling on heat transfer surfaces can occur to the extent scale causes a reduction in cooling effectiveness and can lead to system shutdown. The pilot project evaluated two chemical treatment processes and two silica removal processes for a period of 4 months in a full-scale pilot. The chemical treatment processes were not successful in meeting reliability standards while meeting the 75 percent efficiency goal (-350 mgIL), while the filtration technologies demonstrated over 90 percent efficiency, where efficiency is defined as the percent of expected vendor process water usage to current LANL water usage in cooling tower systems. This paper discusses the results of the field test. and evaluates performance, reliability, and regulatory compliance, of the processes and presents an evaluation for full implementation options.
Date: 2010-09-17
Description: A Professional Project Report Submitted in Partial Fulfillment of the Requirements For the Degree of Master of Water Resources, The University of New Mexico, Albuquerque, New Mexico February 23, 2001.
URI: http://hdl.handle.net/1928/11214

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