摘要
以膨胀蛭石为支撑材料,石蜡为相变材料,采用真空吸附法制备复合相变颗粒,然后通过压模法制备被动式围护结构相变板材。对复合相变颗粒进行了差示扫描量热仪(DSC)、扫描电子显微镜(SEM)、长周期热循环性测试,并对相变板材的导热系数及其蓄热性能进行测试。结果表明:石蜡在膨胀蛭石多孔结构中被充分吸收,制备的复合相变颗粒具有良好的热稳定性;复合相变颗粒的熔化和冷冻潜热值分别为69.81 J/g和68.36 J/g,熔化和冷冻温度分别为19.80℃和29.74℃;相变板材在温度变化过程中具有明显的延迟现象,在调节温度方面有良好的应用前景。
The composite phase change material partieles（CPCMPs） were prepared by vacuum adsorption method with expand- ed vermiculite as supporting material and paraffin as phase change material. Phase change plate （PCP） of passive enclosure struc- ture was fabricated by mould pressing method with CPCMPs. Differential scanning calorimeter （DSC）, scanning electron microscope （SEM） and long cycle thermal cycling performance tests have been conducted to analyze the properties of CPCMPs,and the thermal conductivity and thermal storage performance of PCP were characterized. It is concluded that：paraffin was suffieiently absorbed in the porous structure of expanded vermiculite, and the prepared CPCMPs have good thermal stability; the melting and freezing latent heat values of CPCMPs were 69.81 J/g and 68.36 J/g, and the melting and freezing temperatures were 19.80 ℃ and 29.74 ℃, respeetively,PCP has obvious delay phenomenon in the process of temperature change,and possesses a good prospect in regulating temperature.
作者
刘云
孔祥飞
戎贤
王建军
姚成强
杨华
LIU Yun;KONG Xiandei;RONG Xian;WANG Jianjun;YAO Chengqiang;YANG Hua(School of Energy and Environmental Engineering, Hebei University of Technology,Tianjin 300401,China;School of Civil and Traffic, Hebei University of Technology, Tianjin 300401, China;Hebei Qugang Expressway Development Co., Ltd., Baoding 073000, China)
出处
《新型建筑材料》
北大核心
2018年第4期27-30,34,共5页
New Building Materials
基金
国家自然科学基金项目(51408184)
天津市自然科学基金项目(15JCQNJC07800)
河北省自然科学基项目(E2017202136)
关键词
石蜡
膨胀蛭石
相变板材
蓄热性能
paraffin, expanded vermiculite,phase change plate,thermal storage performance
