A method of improving the strength of molten salt phase change heat storage material by using phenolic resin

Abstract

The invention discloses a method for improving the strength of a molten salt phase-change heat storage material by using a phenolic resin, and belongs to the field of phase-change heat storage materials. The present invention is based on a preparation method of a stable molten salt phase change material, using ceramic materials as a matrix and phenolic resin as a binder to provide a stable structure through the ceramic matrix, and formability provided by the phenolic resin, plus the carbon structure produced by the high-temperature partial cracking of the phenolic resin Furthermore, a molten salt phase change heat storage body with excellent mechanical properties can be obtained. The preparation method of the invention is simple, low in cost and can be produced on a large scale, solves the currently common problem of insufficient mechanical properties of molten salt phase-change heat storage materials, and has great significance for expanding the application range of molten salt phase-change heat storage materials.

Description

technical field [0001] The invention belongs to the field of phase change heat storage materials, in particular to a method for improving the strength of molten salt phase change heat storage materials by using phenolic resin. Background technique [0002] As a national strategic emerging industry, energy storage technology is an important part of energy conversion and utilization technology. Choosing a suitable energy storage technology route is of great significance for improving the utilization efficiency of renewable energy, enhancing the peak-shaving capability of thermal power generation, and alleviating power grid dispatching. It is of great significance, and its large-scale application will have a major impact on energy transformation, power grid pattern, and power supply structure. Heat storage material is the core and key of heat storage technology. It collects and stores the excess energy that is temporarily unused for a period of time or in a certain space, and r...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem of insufficient mechanical properties of ceramic base (magnesia, diatomite) heat storage materials composed of molten salt phase change heat storage materials (nitrates, carbonates and multi-element eutectic salts), and uses phenolic resin bonding The original structure is more stable, and at the same time, the decomposition of phenolic resin during high temperature treatment can provide a carbon structure that makes the ceramic matrix more stable, making the mechanical properties of the phase change heat storage body more excellent, and the phenolic resin and its decomposed The carbon structure has a good thermal conductivity and has a low impact on the heat storage performance. Finally, a phase change heat storage body with excellent mechanical properties and heat storage performance can be prepared.

Images