Transient behaviour of salt gradient stabilised shallow solar ponds

N.D. Kaushik and P.K. Bansal

Applied Energy, 1982, vol. 10, issue 1, 47-63

Abstract: This paper presents the results of experimental and analytical investigations of the transient thermal processes in a salt gradient stabilised pond of shallow (10 cm) depth, useful for short-term storage applications. A small convective sublayer (about 3 cm thick) of uniform temperature tends to form at the bottom of the pond. The convective-non-convective zone boundary below the gradient zone exhibits movements with time of day as well as from day to day. This suggests that only local properties and local gradients are relevant to the stability condition. A thin oil layer cover at the pond surface considerably enhances the temperature in the pond and aids its stability. A simple transient thermal model of the pond is developed. The observed temperatures and depths of the zones are in close agreement with theory.

Date: 1982
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