Device and system for the implementation of the falling pond method to counter the upward diffussion of salt in a salinity gradient solar pond
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United States of America Patent
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Oct 9, 2018
Grant Date -
Oct 29, 2015
app pub date -
Apr 29, 2015
filing date -
Apr 29, 2014
priority date (Note) -
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Abstract
A Salinity Gradient Solar Pond has saturated salt water in the bottom of the pond and nearly fresh water at the top, with a gradient zone between the top and bottom. Due to this salinity stratification the upward diffusion of salt is a natural consequence in SGSP's. This upward diffusion of salt has been found to range 60-80 gr/m2/day (Tabor, H.; Solar Ponds, Solar Energy, v. 27 (3), pp. 181-194, 1981 and v. 30 (1), pp. 85-86, 1983). Controlling the salinity gradient in SGSP systems is vital to their reliable operation. One proposed method for controlling the salinity gradient is the so called “Falling Pond” method, where water is extracted from the saturated bottom layer by some means and returned to the nearly fresh upper layer. This action creates a downward velocity in the pond's layers which can be matched to counter the upward diffusion of salt, thereby maintaining the pond's gradient stationary in space.
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