Heat exchanging system using water circulation to intensify medium- and low-temperature paraffin phase change heat storage

Abstract

The invention discloses a heat exchanging system using water circulation to intensify medium- and low-temperature paraffin phase change heat storage. The heat exchanging system comprises a heat storage container and a water circulating system allowing water to circulate in the heat storage container, the upper portion of the heat storage container is loaded with a paraffin phase change material, the lower portion of the heat storage container is loaded with water, and a heat exchanger is arranged in the middle of the heat storage container; water distributor nozzles are arranged inside the heat storage container, and a water circulating pump, a circulating water inlet connected with the lower portion of the heat storage container and a circulating water outlet connected with the upper portion of the heat storage container are arranged in the water circulating system. The heat exchanging system has the advantages that the heat exchanging efficiency of a paraffin phase change heat storage system is increased, the problem of low heat exchanging efficiency due to the fact that a liquid paraffin phase change material is low in heat conduction coefficient and high in viscosity is solved,the complexity of the heat exchanger in the medium- and low-temperature paraffin phase change heat storage system can be reduced, and the manufacturing cost of the heat exchanger can be lowered.

Description

technical field [0001] The invention relates to a heat exchange system for medium and low temperature paraffin phase change heat storage, in particular to a heat exchange system for strengthening medium and low temperature paraffin phase change heat storage by using water circulation. 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 m...

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Problems solved by technology

Although the paraffin-based microcapsule phase change material can solve the heat storage and release efficiency well, its preparation process is relatively complicated, difficult to control, and the production cost is high, which affects the large-scale application of this type of material.

[0008] 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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