A kind of medium temperature inorganic nano phase change energy storage material and preparation method thereof

Abstract

The invention relates to an intermediate-temperature inorganic nano PCM and a preparation method of the intermediate-temperature inorganic nano PCM, belongs to the field of the low-carbon and energy-saving technology of buildings. The intermediate-temperature inorganic nano PCM takesn inorganic nano rubber powder as a wall material and inorganic nano iron vitriol as a core material, the inorganic nano rubber powder is silica gel and alumina powder prepared by hydrolyzing ethyl orthosilicate with aluminic acid ester, the inorganic nano energy storage material is formed in a way that the wall material of the nano rubber powder wraps the core material of the nano inorganic salt aquo-complex PCM, the phase change temperature is 64 DEG C, is an intermediate temperature and is suitable for heat preservation and thermal insulation of a drying room.

Description

technical field [0001] The invention belongs to the technical field of low-carbon and energy-saving buildings, and specifically relates to a medium-temperature inorganic nano-phase-change energy storage material and a preparation method thereof. Background technique [0002] A large amount of heat is generated in the natural environment every day, such as: solar energy, animal body radiation heat, combustion heat, friction heat, object running heat, etc. Phase change energy storage materials are substances that absorb the heat during the phase change process, and release it to the environment when needed, so as to achieve the purpose of controlling the ambient temperature and saving energy. According to its chemical composition, it can be divided into: organic phase change energy storage materials, hybrid phase change energy storage materials and inorganic phase change energy storage materials. Organic phase change energy storage materials have the advantages of good chemic...

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Problems solved by technology

In order to solve the above problems, the inventors proposed various schemes, such as "A Heat Storage Medium and Its Application", application number 200610104583.8, which proposed a salt water compound composed of magnesium nitrate, magnesium chloride and water to form a eutectic; "An Inorganic Phase Change Energy Storage "Material", application number 201210037753.0, by adding nucleating agent and dispersant to inorganic salt hydrate; Anti-supercooling agent sodium tetraborate, although these methods have some effects, they are only limited to certain systems, and there are certain limitations in the selection and use of phase change energy storage materials. The inventors of the present invention have found that the inorganic salt hydrate Phase-change energy storage materials are dispersed into nano-scale particles and wrapped into nano-microcapsules, which can well solve the problems of supercooling and phase separation of phase-change energy storage materials. The inventors developed a series of nano-inorganic phases based on this discovery and idea Variable energy storage materials, the present invention is exactly one of this inorganic phase change energy storage materials developed

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