Fly ash is commonly used as the adsorption carrier of phase change materials because of its good adsorption performance.However,its low thermal conductivity and limited temperature and humidity control performance hinder its application and development.This paper introduces the classification and characteristics of PCM,summarizes the modification methods of fly ash,heat storage properties,thermal conductivity and humidity control properties of PCM based on fly ash.The specific surface area and poros-ity of fly ash can be increased by high temperature calcination,microwave,pickling and alkaline leaching and composite modification.The addition of carbon-based materials can effectively improve the thermal conductivity and heat storage performance of fly ash based composites.After the modified fly ash is com-bined with inorganic mineral and organic polymer material,the temperature and humidity regulating prop-erties are improved.
关键词
粉煤灰/改性方法/储热调湿/相变材料
Key words
fly ash/modification method/heat storage and humidity control/phase change material
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