Phase-change energy storage ceramsite and preparation method thereof

Abstract

The invention discloses phase-change energy storage ceramsite and a preparation method thereof, relating to the technical field of phase-change energy storage materials. The phase-change energy storage ceramsite contains the following raw materials in parts by weight: 50-70 parts of diatom plate polishing waste, 3-5 parts of quick lime, 20-50 parts of gel materials, 20-30 parts of solid-liquid organic phase-change energy storage materials and 15-40 parts of water. The preparation method comprises the steps of mixing the raw materials in a formula ratio, and carrying out granulation and room-temperature maintenance, so as to obtain the ceramsite. According to the phase-change energy storage ceramsite, the diatom plate polishing waste and the quick lime are taken as the raw materials, the solid-liquid organic phase-change energy storage materials are taken as an energy storage material, the raw materials and the energy storage material are matched with the gel materials so as to generatethe light and high-strength phase-change energy storage ceramsite, so that the application defect of fusion leakage of an organic phase-change material is remedied by virtue of the microstructure advantages and relatively high adsorption capacity of diatom plate polishing powder, and the high-added value functional utilization of the diatom plate polishing waste is realized. By utilizing fire-free and steam-free manners, the pretreatment of the raw materials is omitted, so that the preparation method has the advantages of simple preparation process, low cost, energy saving and environmental protection and the like.

Description

technical field [0001] The invention relates to the technical field of phase change energy storage materials, in particular to a phase change energy storage ceramsite and a preparation method thereof. Background technique [0002] With the rapid development of social economy, energy issues have gradually become a key factor restricting social development. Building energy accounts for 20-40% of primary energy consumption, even as high as 45% in some developed areas. It is estimated that by 2020, the national high energy-consuming building area will reach 70 billion square meters. Therefore, if we do not pay attention to building energy-saving design, it will directly aggravate the energy crisis. Phase change energy storage is an energy storage technology that effectively solves the contradiction between the supply and demand of solar energy, wind energy and other new energy sources. It is an effective means to improve energy utilization efficiency and save energy. As a kin...

AI Technical Summary

Problems solved by technology

[0004] However, the above several shape-setting composite phase change materials all have the following disadvantages: 1. The phase change temperature is not suitable, and cannot be well applied to building energy saving

2. The mechanical properties and durability are poor, and the microcapsules are prepared by wrapping the phase change material, which has poor mechanical properties and durability and is easily damaged

3. The preparation process of microcapsules or polymers is complicated, the preparation cost is high, or the raw materials are toxic, and the obtained shaped composite phase change materials are flammable

For example, patent CN 103509529A discloses a phase-change energy storage ceramsite and its preparation method. Through vacuum adsorption, phase-change materials are adsorbed on porous ceramsite successively. This method utilizes the porous adsorption characteristics of ceramsite, and there are small adsorption capacity, Disadvantages such as phase change energy storage is not obvious

Patent CN 104291859A discloses an energy storage non-burning silt ceramsite. The energy storage non-burning silt ceramsite is composed of a phase change energy storage material, a porous material activator and silt powder mixed in a certain mass ratio, but a certain Steam curing at high temperature for 24-48 hours, and then curing at room temperature for a period of time, still has the problems of complex process, high energy consumption, and long production cycle

Patent CN 104086134A discloses a paraffin / ceramsite phase-change energy storage concrete, which has the advantages of both ordinary building materials and phase-change materials. Molding, maintenance 24h-48h, demoulding and continuous maintenance until 28d, long production cycle, complex process and high energy consumption