A composite building material capable of energy storage

Abstract

A composite building material capable of energy storage is disclosed. The composite material is obtained by compositing a mixture comprising capric acid and lauric acid, and a building base material, wherein the weight ratio of the capric acid and the lauric acid is 5:2. A preparing method of the composite material includes: heating the capric acid and the lauric acid separately, mixing the capric acid and the lauric acid according to the ratio above mentioned after the capric acid and the lauric acid are fully melt to form an eutectic mixture, heating the eutectic mixture to a complete melting state, and compositing the eutectic mixture to a building base material to form the building material capable of energy storage. In the field of building energy conservation, through compositing a wall material and an energy storing material, the temperature adjusting capability of a building can be improved, and the objectives of energy conservation and comfort can be achieved. The phase-transition temperature (19-24 DEG C) of the energy storing material agrees well with the adjusting temperature (18-25 DEG C) in a room, and the energy storing material is high in latent heat of phase change (120-150 kJ / kg), free of supercooling and phase separation phenomena, nontoxic, non-corrosive, stable in performance and good in repeatability.

Description

technical field [0001] The invention relates to a building material, especially a composite building material capable of storing energy. Background technique [0002] Energy saving and environmental protection are the most important issues in the field of energy utilization. Using phase change latent heat of phase change materials to store energy (cold storage, heat storage) is a new environmental protection and energy saving technology. During the process of phase change itself, the phase change material absorbs the heat (cold) of the environment and releases the heat (cold) to the environment when needed, so as to achieve the purpose of controlling the temperature of the surrounding environment and saving energy. It has broad application prospects in building energy saving, solar energy utilization, refrigeration and air conditioning, heat recovery and other fields. [0003] An intersecting energy storage material is a material that absorbs heat when it melts and release...

AI Technical Summary

Problems solved by technology

Most inorganic phase change energy storage materials are corrosive, and have the disadvantages of overcooling and phase separation during the phase change process, which affect their energy storage capabilities; while organic phase change energy storage materials are not only less corrosive, but also There is almost no disadvantage of phase separation during the transformation process, and the chemical properties are stable and the price is cheap

However, organic phase change energy storage materials generally have the disadvantage of low thermal conductivity, which leads to poor heat transfer performance and low energy storage utilization rate in the application of energy storage systems. thereby reducing the performance of the system