【摘要】 根据火山石内部蜂窝状结构,采用真空加温熔融吸附方法制备了月桂酸(LA)-火山石(VR)定型相变材料。并通过综合热分析、扩散-渗出圈法、步冷实验等对定型相变材料的热物参数、渗漏、热稳定性、储热特性等性能进行表征分析。结果表明,当复合PCM中火山石质量分数在45%-55%之间具有较好的结构稳定性,火山石质量分数为50%时,其相变材料渗出第一圈的时间与纯LA相比延长超过20倍。但随火山石比重增加,其热焓会降低。更多还原

【Abstract】 According to the honeycomb structure of volcanic rocks, lauric acid(LA)-volcanic rocks(VR)shape-stabilized phase change materials were prepared using vacuum heating melt adsorption method. The thermal physical parameters, leakage, thermal stability and thermal storage characteristics of the phase change materials were characterized and analyzed by comprehensive thermal analysis, diffusion exudation circle method and step cooling experiment. The results show that PCM has good structural stability when the mass fraction of volcanic rock is between 45% and 55%. When the mass fraction of volcanic rock is 50%, the time of first cycle exudation of PCM is more than 20 times longer than that of pure La. However, with the increase of the specific gravity of volcanic rocks, the enthalpy will decrease.更多还原