Innovative Production of PCMs （Phase Change Materials） Preparation by Vacuum Impregnation： Mechanical Strength of Mortars Cement with Composite PCMs Content  

作　　者：Sirikalaya Suvachittanont Apinya Duangchan Thanit Metheenukul 

机构地区：[1]Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand

出　　处：《Journal of Chemistry and Chemical Engineering》2013年第11期1094-1099,共6页化学与化工（英文版）

摘　　要：An experimental investigation was conducted to study the efficiency of thermal insulation of composite PCMs （phase change materials） produced by vacuum impregnation process between paraffin （PCMs） and fly ash particles. DSC （differential scanning calorimeter） has been used to determine the thermal properties of latent heat of melting and heat capacity for composite PCMs. Vacuum impregnation pressure of 40 in.Hg, paraffin melting temperature of 90℃, vacuum time and impregnation time of paraffin of 30 min are the optimum condition of composite PCMs productions. The values of latent heat of melting and heat capacity are 74.00 J/g and 15.726 J/g.℃ for composite PCMs that produces by the optimum condition in vacuum impregnation process. Increasing the amount of composite PCMs replacing for cement in mortars causes the compressive strength, flexural strength and tensile strength reduction. Compressive strength, flexural strength and tensile strength of mortar with and without composite PCMs can be increased by the longer time of water curing for mortar specimens. Thermal conductivity （k） of mortar cement is reduced by increasing the amount of composite PCMs which replaced for cement in mortar plate compositions. Composite PCMs have the efficiency for thermal energy insulation when incorporated into the buildings. Therefore, this property of paraffin/fly ash composites PCMs can reduce the energy consumption for temperature control in the buildings.

关 键 词：PCMs latent heat heat capacity hydraulic cement mortar mechanical strength. 

分 类 号：TQ177.6[化学工程—硅酸盐工业] TB34[一般工业技术—材料科学与工程]