A SALT GRADIENT SOLAR POND FOR SOLAR HEAT COLLECTION AND LONG TERM STORAGE
The solar pond project at the University of Sussex aims to study the design, construction, filling, and operation of salt gradient solar ponds, and to develop instrumentation for monitoring behaviour and performance. This paper describes the construction, filling, and operation of an outdoor pilot solar pond, a simple means of maintaining salt density gradient, and work on pond transparency. We have successfully experimented with extracting heat from the non-convecting insulation layer and the convecting storage layer of the pond. This permits interception and extraction of heat flow in the non-convecting layer. Both steady state and finite difference model calculations are presented to indicate the improvements in operating efficiency and temperature that are achievable with this method of heat extraction. Pond salinity density readings have been taken by direct weighing, and an especially developed direct reading instrument. This measures the Archimedean upthrust on a small disc shaped float by balancing it against a downward magnetic force exerted by an external solenoid on a small permanent magnet attached to the float. The current required to stabilize the vertical position of the float gives a direct measure of the density.
Bibliographic Reference: EUR 9838 EN (1985) MF, 54 P., BFR 150, BLOW-UP COPY BFR 270, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123102800 / Last updated on: 1987-01-01
Available languages: en