Call number:
ZSP-201-78/26
In:
CRREL Report, 78-26
Description / Table of Contents:
Ice fog suppression experiments on the Fort Wainwright Power Plant cooling pond were conducted during the winters of 1974-76. Baseline information studies occupied a sizable portion of the available ice fog weather in 1974-75. Then hexadecanol was added to the pond and dramatically improved visibility by reducing fog generated from water vapor released by the pond at -14 C. Although this temperature was not low enough to create ice fog, the cold vapor fog created was equally as devastating to visibility in the vicinity of the pond. During the winter of 1975-76, suppression tests were continued using films of hexadecanol, mixes of hexadecanol and octadecanol, and ethylene glycol monobutyl ether (EGME). Suppression effectiveness at colder temperatures was stuided and limits to the techniques were probed. A reinforcing grid was constructed that prevented breakup of the film by wind and water currents. Lifetime tests indicated that EGME degrades much more slowly than either hexadecanol or the hexadecanol-octadecanol mix. The films were found to be very effective fog reducers at warmer temperatures but still allowed 20% to 40% of normal evaporation to occur. The vapor thus produced was sufficient to create some ice fog at lower temperatures, but this ice fog occurred less frequently and was more quickly dispersed than the thick fog that was present before application of the films.
Type of Medium:
Series available for loan
Pages:
iv, 27 Seiten
,
Illustrationen
Series Statement:
CRREL Report 78-26
URL:
https://hdl.handle.net/11681/9456
Language:
English
Note:
CONTENTS
Abstract
Preface
Introduction
Ice fog from cooling ponds
Evaporation
Relative humidity and cold air
Ice fog suppression
Air movement
Plastic films
Rafts
Injection wells
Cooling towers
Chemical films
Reinforced film experiments
Meteorological data collection
Floating reinforcement grid
Application of the hexadecanol film
Hexadecanol, octadecanol mixes
Ethylene glycol monobutyl ether
Laboratory tests of suppression effectiveness
Conclusions
Literature cited
Appendix A. Design for an automatic thin chemical film applicationsystem
Appendix B. Meteorological data
Location:
AWI Archive
Branch Library:
AWI Library
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