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RESEARCH PAPERS: Evaporation and Boiling

On the Use of Monolayers to Reduce Evaporation From Stationary Water Pools

[+] Author and Article Information
T. D. Tang, M. T. Pauken, S. M. Jeter, S. I. Abdel-Khalik

The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405

J. Heat Transfer 115(1), 209-214 (Feb 01, 1993) (6 pages) doi:10.1115/1.2910650 History: Received March 01, 1992; Revised June 01, 1992; Online May 23, 2008

Abstract

An experimental investigation has been conducted to quantify the extent by which monolayers of fatty alcohols can reduce evaporation from a deep stationary water pool within a controlled environment. Octadecanol (stearyl alcohol), C17 H35 –CH2 –OH, was chosen as the surface film and ethanol was selected to be the spreading agent. Evaporation suppression of 60 percent was achieved at a water temperature of 25°C with an air temperature of 20°C and a relative humidity of 70 percent. The experimental techniques and data have been validated by comparing the measured evaporation rates for film-free water with earlier data published by other investigators. Data for the evaporation rates of water covered by octadecanol films were correlated as a function of vapor concentration differences between the water surface and air.

Copyright © 1993 by The American Society of Mechanical Engineers
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