Phase change heat storage material as well as preparation method and application thereof and phase change heat storage device

Abstract

The invention discloses a phase change heat storage material as well as a preparation method and application thereof and a phase change heat storage device. The phase change heat storage material comprises the following raw materials in parts by mass: 60-75 parts of hydrous salt, 0.5-3 parts of nucleating agents, 1-3 parts of anti-supercooling agent, 1-3 parts of phase splitting preventing agent, 1-5 parts of heat conducting reinforcing materials and 1-5 parts of rare earth compound. The preparation method is characterized by mixing various raw materials, melting, uniformly mixing and cooling the mixture and then grinding the mixture into powder, thus obtaining the phase change heat storage material. The phase change heat storage material is applied to a heat collector. The phase change heat storage device comprises a shell and the phase change heat storage material arranged in the shell. The phase change heat storage material has the beneficial effects that the phase change heat storage material has higher phase change latent heat, low toxicity and weak corrosivity; the phase change heat storage material is encapsulated in the shell and then the shell is placed in the heat collector, thus avoiding the problem of corrosion or scaling caused because the phase change heat storage material comes into direct contact with the wall of the heat collector; the phase change heat storage material has a better application prospect in the field of solar power generation.

Description

technical field [0001] The invention relates to a phase change heat storage material, its preparation method and application, and a phase change heat storage device. Background technique [0002] Phase change heat storage materials have relatively unique latent heat performance: in the process of phase change, they can absorb or release heat from the external environment, so they can realize the function of heat storage. In the prior art, the widely used ones are: solid-liquid phase change materials and solid-solid phase change materials. Solid-liquid phase change materials are characterized by low cost, but their disadvantages are also obvious, such as corrosion of containers, easy leakage, easy phase separation or supercooling. [0003] On the other hand, the oil crisis has made countries around the world strengthen the development of clean energy and new energy, including solar power generation, etc. Solar power generation systems usually use reflectors to reflect sunlig...

AI Technical Summary

Problems solved by technology

In the prior art, molten salt is often used as the working medium in the collector; however, since the molten salt is placed directly in the collector, it is easy to block or scale, or corrode the collector wall