Evaporation suppression and solar energy collection in a salt-gradient solar pond

Resource type: Composite Resource
Storage: The size of this resource is 1.9 MB
Created: Mar 31, 2018 at 11:59 p.m.
Last updated: Apr 09, 2018 at 7:13 p.m.
Citation: See how to cite this resource
Sharing Status: Public
Views: 848
Downloads: 42
+1 Votes: Be the first one to 
Comments: No comments (yet)


Evaporation represents a significant challenge to the successful operation of solar ponds. In this work, the suppression of evaporative losses from a salt-gradient solar pond was investigated in the laboratory. Two floating element designs (floating discs and floating hemispheres) and a continuous cover were tested; all three covers/elements were non-opaque, which is unique from previous studies of evaporation suppression in ponds or pools where increasing temperature and heat content are not desired. It was found that floating discs were the most effective element; full (88%) coverage of the solar pond with the floating discs decreases the evaporation rate from 4.8 to 2.5 mm/day (47% decrease), increases the highest achieved temperature from 34 °C to 43 °C (26% increase), and increases heat content from 179 to 220 MJ (22% increase). As a result of reduced evaporative losses at the surface, the amount of heat lost to the atmosphere is also reduced, which results in lower conductive losses from the NCZ and the LCZ and hence, increased temperatures in the NCZ and LCZ. The magnitude of evaporation reduction observed in this work is important as it may enable solar pond operation in locations with limited water supply for replenishment. The increase in heat content allows more heat to be withdrawn from the pond for use in external applications, which significantly improves the thermal efficiencies of solar ponds.

Raw project data is available by contacting ctemps@unr.edu

Subject Keywords

Deleting all keywords will set the resource sharing status to private.


How to Cite

Ruskowitz, J. A. (2018). Evaporation suppression and solar energy collection in a salt-gradient solar pond, HydroShare, http://www.hydroshare.org/resource/3e625ffefc394380af3b1e29fbbfbbff

This resource is shared under the Creative Commons Attribution CC BY.



There are currently no comments

New Comment