Phase change material wrapped thermal storage concrete and preparation method thereof

Abstract

The invention provides phase change material wrapped thermal storage concrete and a preparation method thereof. The preparation method is characterized by taking dolomite as a coarse aggregate, bauxite powder as a fine aggregate and aluminate cement as a cementing material and adding silica micro powder, activated alumina micro powder, silicon carbide powder and adipic acid/silicon dioxide capsule granules to prepare the thermal storage material. The preparation method comprises the steps of adding 4-6% of water after drying and mixing the raw materials uniformly, then mixing water with the raw materials uniformly and putting the mixture into a steel mould, demoulding the product after putting the mixture in the steel mould at normal temperature for 24 hours, drying and curing the product at 20-25 DEG C for 72 hours, and then baking the product at 105-120 DEG C for 24 hours, thus obtaining the thermal storage material which can be used in the industrial field. The thermal storage material can be applied to dewatering and drying in the industries such as solar air conditioners, floor heating, chemical printing and dyeing and the like. The preparation method is reasonable in material selection and advanced in preparation process, thus the thermal storage material used in the industrial field can be produced at low cost. The material not only substantially improves the comprehensive properties including thermal storage, heat release efficiency and the like but also more importantly solves the technical difficulty of phase change material leakage.

Description

Technical field [0001] The invention relates to the field of energy storage materials, in particular to a heat storage concrete wrapped with phase change materials and a preparation method thereof. Background technique [0002] Energy is the material basis for human society to survive and develop. At present, the energy consumed in our country mainly comes from non-renewable fossil energy such as coal, oil, and natural gas. With the development of my country's economy and the acceleration of industrialization and urbanization, the demand for energy continues to grow. Building a stable, economic, clean and safe energy supply system is facing major challenges. Facing the increasingly urgent energy crisis, improving energy utilization efficiency is of great significance to reducing energy consumption and protecting the environment. In the field of heat utilization, whether it is the utilization of solar energy or industrial waste heat, the biggest problem is heat storage. Without ...

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Problems solved by technology

[0007] Although there are many reports on heat storage materials in the above literatures, there are certain deficiencies, most of which are based on sensible heat storage methods.

The main problem of concrete heat storage materials is that the unit heat storage is small, so the required volume is large, and the required heat exchange pipes are more, so the processing cost, installation and transportation costs are high, and the molten salt is more corrosive. The requirements for pipelines are high, which greatly increases the cost. Organic matter has a low thermal conductivity. When using it, it is necessary to add materials to improve the thermal conductivity, which also increases its application cost.

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