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Experimental Study on the Thermal Storage Performance and the Volatility of Binary Polyalcohols Systems Used in the Wall

YAN Quan-ying,LIANG Chen,ZHOU Ran(Department of Urban Construction Engineering,Beijing Institute of Civil Engineering and Architecture,Beijing 100044,China)  
The thermal storage performance and the volatility of binary systems consisting of neopentylglycol(NPG),pentaerythritol(PE) and trihytdroxy methyl-aminomethane(TAM) with different component are studied experimentally.In the solid-solid phase change process,the weightless rates of binary polyalcohols systems are lower and less than 5 percent,and the weightless rates are closed to zero if binary polyalcohols systems are sealed.In the solid-liquid phase change process,the weightless rates of binary polyalcohols systems are larger,and the weightless rates of binary systems are smaller if polyalcohols are sealed.The higher the temperature of polyalcohols is,the higher the volatility.Polyalcohols should be sealed in the process of thermal storage.The phase change temperature and phase change heat of binary systems are studied experimentally by differential scaning calorimeter(DSC).Feasibility of binary polyalcohols systems used in the building envelope is analyzed.The experimental results can provide the basis for the application of solid-solid phase change materials in building energy conservation field.
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