Composite inorganic hydrous salt phase-change material and preparation method of composite inorganic thermal storage panel

Abstract

The invention relates to the field of composite building decoration materials, in particular to a composite inorganic hydrous salt phase-change material and a preparation method of a composite inorganic thermal storage panel. The composite inorganic hydrous salt phase-change material comprises raw materials in parts by weight as follows: 100 parts of magnesia powder, 10-30 parts of clay powder, 15-25 parts of slag powder, 6-25 parts of Al2O3 filler, 45-60 parts of composite sulfate, 10-32 parts of saw dust, 0.2-1 part of citric acid, 0.5-1 part of composite phosphate and 75-85 parts of water. The raw materials of the composite inorganic hydrous salt phase-change material are mixed together and stirred until uniform stirring is realized, mixed slurry is prepared, then the mixed slurry is composited with glass fiber cloth, and the composite inorganic thermal storage panel is prepared. According to the technical scheme, the material not only has proper phase-change temperature, high energy storage density, low degree of supercooling and avoidance of layering, but also has the effects of good stability, high thermal conduction coefficient, avoidance of metal corrosion, water resistance and the like.

Description

technical field [0001] The invention relates to the field of composite building decoration materials, in particular to a preparation method of a composite inorganic hydrated salt phase change material and an inorganic composite heat storage panel. Background technique [0002] At present, a large part of the total energy consumption of society is used in the construction field. There are problems in different situations in the building decoration materials widely used at present, such as exterior wall panels, interior wall panels, floors, suspended ceilings, heating (cold) equipment such as air conditioners, floor heating, ground source heat, boiler water heaters, etc. [0003] The purpose of people using heating or air conditioning is to balance the indoor air temperature and increase the indoor comfort. And if the phase change material is used for building materials, it will play a good role or increase this effect. In terms of cold storage, cold storage is carried out w...

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Problems solved by technology

[0005] For example, in the field of electric floor heating, power supply is more popular than other heating sources. It is suitable for areas without central heating and renovation of old houses. Compared with air conditioners, it is more energy-saving, environmentally friendly and comfortable. Electric floor heating is divided into electric heating film electric floor heating and heating cable. Electric floor heating, heating cable floor heating heating element has high temperature on the line, low temperature between lines, and poor temperature uniformity; it is not good for the control of local overheating. Generally, there is only one circuit, which must be controlled by frequent opening and closing of temperature control to control the room temperature The heating area of ​​the electric heating film electric floor heating is large, the heating body temperature is low, the ground temperature uniformity is good, the floor height is less occupied, multiple circuits can be connected in parallel, and the temperature control actually required for heating is easier to achieve. The electric heating film has roughly four There are three types, printing ink type, ultra-thin metal sheet type, carbon fiber type and conductive polymer type. The disadvantages are: first, it will cause local overheating due to coverage during use, so an overheating protection system should be installed; second, effective use of peaks and valleys In terms of electricity, there is a lack of effective heat storage and energy storage systems, and the use of low-temperature phase change materials can improve and solve the above shortcomings

These shortcomings have largely restricted the application of solid-liquid phase change materials in actual production.

[0009] 3. In the process of cooling solid-liquid phase change materials from liquid to solid, there is always the problem of overcooling, which leads to the inability to crystallize in time within the required temperature range

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