Energy storage composition, its preparation method and its application

Abstract

The invention discloses an energy storage composition. The energy storage composition comprises the following components in parts by weight: 0.5 to 15 parts of common silicate cement, a rigid crystal material comprising 20 to 60 parts of basalt, 20 to 30 parts of river sand, a heat conduction modifier comprising 1 to 10 parts of graphite, an expansion coefficient modifier comprising 1 to 6 parts of rare earth oxides, and 0.2 to 5 parts of enhancer. The embodiment also provides a preparation method of the energy storage composition. The invention also provides a preparation method and applications of the energy storage composition. A solar energy storage module made of the energy storage composition has the advantages of large energy storage capacity, high energy storage temperature, and low manufacture cost, under the situation that the module strength is guaranteed, and the seasonal high efficient storage of solar energy is realized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of solar energy storage, and in particular to an energy storage composition, its preparation method and its application. Background technique [0002] Thermal energy is one of the main forms of solar energy storage. With the vigorous promotion and application of solar energy technology, solar energy storage for heating across seasons has gradually become a hot topic in the utilization of new energy. At present, the common cross-season heat storage mainly adopts the phase change heat storage technology, that is, the heat absorption and heat release process of certain substances in the reversible reaction is used to achieve the storage and extraction of heat energy. Stability and other advantages. As a result, phase change heat storage has broad application prospects in power grid day and night load regulation, building air conditioning, solar energy utilization, and industrial waste...

AI Technical Summary

Problems solved by technology

[0006] Third, the thermal conductivity of phase change materials is poor, which is not conducive to the release of energy storage heat;

[0007] Fourth, because the unit heat storage capacity of the phase change material is not large enough, a larger energy storage module has to be used to obtain considerable storage energy;

[0008] Fifth, during the phase change process of the phase change material, expansion will occur, resulting in irreversible deformation of the energy storage module made of the phase change material, which reduces the service life of the energy storage module;

[0009] Sixth, the cost of phase change materials is relatively high, which is not conducive to the promotion of the application of corresponding solar energy storage modules across seasons

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