High-performance moderate-temperature phase-change energy-storage material and preparation method thereof

Abstract

The invention relates to a high-performance moderate-temperature inorganic phase-change energy-storage material and a preparation method thereof. The material comprises the following components by weight percent: 95-99% of sodium phosphate dibasic dodecahydrate and 1-5% of sodium salt additive, wherein the sodium salt additive comprises sodium metasilicate nonahydrate, sodium salt of carboxy methyl-cellulose and sodium polyacrylate. According to the invention, as an improvement of a traditional inorganic phase-change energy-storage material, the material provided by the invention has larger phase change latent heat larger than 210 J / g and appropriate phase change temperature 30-40 DEG C, is an energy storage material with good performance within the temperature range, and has a wide application prospect.

Description

technical field

[0001] The invention relates to a phase-change energy storage material, in particular to a high-performance medium-temperature phase-change energy storage material and a preparation method thereof. Background technique

[0002] Phase change energy storage materials can exchange energy with the environment during the phase change process, absorb or release a large amount of latent heat of phase change, which can effectively alleviate the problem of energy supply and demand imbalance in space and time, and play a role in improving energy utilization. Compared with sensible heat energy storage, phase change energy storage has the advantages of constant temperature control, wide selection range of phase change temperature, high energy storage density, remarkable energy saving effect, and easy control. It is widely used in heating and air conditioning, heat storage buildings, solar energy utilization, Power supply system optimization, aerospace and extreme environ...