Low-temperature phase-change energy-storage material and preparation method thereof

Abstract

A low-temperature phase-change energy storage material and a preparation method thereof. The material is composed of n-decyl alcohol and n-stearyl alcohol in a weight ratio of 95-97:3-5. The preparation method is to firstly mix n-decyl alcohol and n-octadecanol in a weight ratio of 95-97:3-5, then heat the above mixture in a water bath at 40°C-60°C to completely melt and stir the components evenly, Finally, after cooling to room temperature, the low-temperature phase-change energy storage material can be prepared. The low-temperature phase-change energy storage material provided by the invention has stable performance, is non-toxic and non-corrosive, and can be recycled. The phase change temperature is about 5.1°C, and it can be widely used in snow and ice melting at major airports and roads in northern and plateau regions in winter. It can effectively alleviate the problems of high energy consumption, long time consumption and environmental protection. In addition, the preparation method is simple and the operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of energy storage material preparation, and in particular relates to a low-temperature phase change energy storage material and a preparation method thereof. Background technique: [0002] Phase change materials have the ability to change their physical state within a certain temperature range. During the phase transition, it can absorb or release huge amounts of energy. When the physical state changes, the temperature of the material itself remains almost constant until the phase transition is completed. Although the temperature remains unchanged, the latent heat absorbed or released is quite large. Since this type of material has the advantages of approximately constant temperature during the phase transition process and controllable system temperature, it has been widely used in alleviating the energy crisis and improving energy utilization. [0003] The advantages of organic phase change energy storage...

AI Technical Summary

Problems solved by technology

Disadvantages: small thermal conductivity, low density, poor heat storage capacity per unit volume

However, the temperature for melting snow and ice is only about 5°C. If the above-mentioned phase change energy storage material is applied to the pavement, energy will be wasted due to the high phase change temperature.