The heat storage material is the main body of the heat storage device, and it is also one of the important factors affecting its heat storage and release performance. The parameters of thermal performance of different materials are different, so choosing a relatively suitable heat storage material will inevitably have a favorable effect on the performance of the device. With the development of thermal storage materials, there are more and more types of thermal storage materials. Thermal storage materials can be divided into three layers: low temperature, medium temperature, and high temperature according to the temperature system. The heat storage material between 100 and 250 °C belongs to the medium temperature heat storage material, and the heat storage material whose service temperature is higher than 250 °C belongs to the high-temperature heat storage material. The company uses special magnesia bricks that can operate under any working conditions at 1600 ℃. The heat storage body part in the figure below is a special magnesia brick made of magnesia.
 

The three types of thermal storage materials are briefly described as follows:

(1) Low-temperature heat storage material

Low-temperature range - heat storage below 100 °C. Low-temperature thermal storage is mainly used for waste heat recovery, low-temperature heat utilization of solar energy, heating, and air-conditioning systems, and thermal management of electronic devices. Low-temperature thermal storage systems are usually simple in composition, low in cost, and flexible in design. Common thermal storage materials include water, crystalline hydrated salts, paraffin, and thermochemical materials, among which water is the most widely used. The thermal storage technology in this application's temperature range is basically mature.

 

(2) Medium temperature heat storage material

Medium temperature range——100～250℃ heat storage. The medium-temperature heat storage material has relatively low efficiency, relatively large volume and quality, and relatively low requirements in all aspects. It is suitable for large-scale applications. It is mainly aimed at the ground civil field and is often used as a heating source for the industry. It can also be used in chemical production, metallurgy, power generation, etc. occasion. However, because the medium temperature heat storage material has only received attention in recent years, its research is less.

 

(3) High-temperature heat storage material

High-temperature range - heat storage above 250 ℃. High-temperature heat storage usually has high efficiency and relatively compact operating equipment. It is often used in high-temperature waste heat recovery and utilization, solar thermal power generation, solar pyrolysis hydrogen production, power peak regulation, valley filling, and artificial satellites. The recovered heat energy, regardless of the amount and temperature change with time, can be recovered in the form of high-temperature and high-pressure steam by using a waste heat boiler, converted into electricity, or used as a heat source for effective use.