Salt gradient solar pond technology for accumulating heat by using latent heat

Abstract

The invention provides a method for adding a latent heat accumulating layer at the bottom of a heat storage layer of a salt gradient solar pond, provides the salt gradient solar pond for continuously supplying a lot of heat supply quantities in an effective heat exchange temperature range, and achieves the purposes of guaranteeing stability of a gradient layer and greatly increasing the heat accumulating quantity of the heat storage layer. The salt gradient solar pond consists of three layers from top to bottom: the uppermost layer is an upper convection layer consisting of fresh water; the middle layer is a salt gradient layer with gradually increased salinity from top to bottom; and the lowermost layer is the heat storage layer mainly consisting of strong brine; the lower half part of the heat storage layer is the latent heat accumulating layer; the latent heat accumulating layer is a heat accumulating layer with a phase change material, is positioned in the heat storage layer, and is horizontally spread at the bottom of the heat storage layer; and the phase change material in the latent heat accumulating layer generates solid-liquid phase change in use.

Description

technical field [0001] The invention relates to a salt gradient solar pool technology, which belongs to the field of renewable energy and energy saving. In particular, a salt gradient solar pool technology utilizing latent heat storage with a phase change material layer. Background technique [0002] The salt gradient solar pool is a kind of salt water pool with different concentration structures, and it has the function of collecting and storing solar energy at the same time. The salt gradient solar pond is mainly composed of three layers, the bottom layer is the heat storage layer, which is composed of concentrated brine, the middle layer is the salt gradient layer, and the salt concentration decreases from bottom to top, and the top layer is the fresh water layer. The high-concentration saline solution in the heat storage layer and the gradually decreasing salt gradient in the salt gradient layer from bottom to top in the solar pond prevent the natural convection process...

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Problems solved by technology

[0005] In view of the above problems, the patent of the present invention proposes a method of adding a layer of latent heat storage layer at the bottom of the heat storage layer, which effectively solves the above contradictions, and provides a salt gradient solar pond that continuously provides a large amount of heat within the effective heat exchange temperature range. So as to achieve the purpose of not affecting the stability of the gradient layer and greatly increasing the heat storage of the heat storage layer

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