A heat transfer system using oil-water two-phase enhanced inorganic phase change heat storage

Abstract

The invention discloses a system for enhancing the heat exchange of the inorganic phase change heat storage by utilizing two oil and water phases. The system comprises a heat storage container, and aninert fluid oil phase circulation system for circulating an inert fluid oil phase matter in the heat storage container, wherein a mixture of an inorganic phase change material and water, and the inert fluid oil phase matter are filled in the heat storage container; the inert fluid oil phase matter covers above the mixture of the inorganic phase change material and the water; a heat exchanger is arranged in the middle of the heat storage container; and an inert fluid oil phase circulating pump, an oil distributor spray head, a circulating oil phase inlet and a circulating oil phase outlet arearranged in the inert fluid oil phase circulation system. According to the system, the heat exchange efficiency and the circulating stability of an inorganic phase change heat storage system are improved, and meanwhile, the problem that the inorganic phase change material is separated during a heat storage and release process is solved; and the requirement of the phase change heat storage system on the inorganic phase change material is reduced, the selectivity on the inorganic phase change material is expanded, the cost of the phase change material is further favorably reduced, and the service life of the heat storage system is prolonged.

Description

technical field [0001] The invention relates to a heat exchange system for inorganic phase change heat storage, in particular to a heat exchange system for strengthening inorganic phase change heat storage by using oil-water two-phase. Background technique [0002] Energy is the basis for the survival and development of modern society. As an important strategic support to promote my country's energy revolution, the Energy Internet is of great help to adapt to the large-scale development of renewable energy, improve the efficiency of energy development and utilization, promote the opening of the energy market and industrial upgrading, and enhance the energy internationalization. The level of cooperation is of great significance. [0003] The development of the Energy Internet with distributed and renewable energy interconnection as the essence will be the general trend, and energy storage technology just provides an effective means of implementation for the Energy Internet. E...

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Problems solved by technology

However, the introduction of high thermal conductivity materials will cause phase separation due to the difference between the density of the material and the density of the phase change material, especially after multiple heat storage and release cycles, the heat transfer efficiency will be greatly reduced

[0006] It is a conventional method to enhance heat transfer through mechanical disturbance, but the phase change characteristics of solid-liquid phase change heat storage materials make it difficult to realize the traditional stirrer agitation enhanced heat transfer method, such as an inorganic material that reduces phase separation disclosed in patent CN103913087A The phase change heat storage device uses a stirrer to stir to reduce the phase separation of the inorganic phase change material and improve the heat transfer efficiency at the same time, but the stirrer will not work when the material needs to store heat in a solid state

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