相变材料能在特定的温度(相变温度)下发生物相变化,并伴随有热量的吸收或放出,从而用以控制周围环境的温度。这种物相变化可以是气-液,也可以是液-固相的变化,对于低温相变材料通常使用液固相变。早在五十年代因空间宇航的要求,开始了寻找高潜热的温控相变材料研究,近年来已发展到民用取暖和储热的应用上。人们将相变材料密封在聚乙烯管中 Phase change materials can phase change at a specific temperature (phase change temperature), accompanied by the absorption of heat or release, which is used to control the temperature of the surrounding environment. This phase change can be gas-liquid, it can also be a liquid-solid phase change, low temperature phase change material is usually used liquid-solid phase transformation. As early as the fifties because of the requirements of space aerospace, began looking for high-temperature temperature-controlled phase change material research, in recent years has been developed to civilian heating and heat storage applications. People sealed the phase change material in a polyethylene tube