The Volatility and the Thermal Storage Performance of Binary Polyalcohols Systems Used in the Wall

摘要

In this paper, the volatility of binary Systems, consisting of neopentylglycol(NPG), pentaerythritol(PE) and trihytdroxy methyl-aminomethane(TAM) with different components, was 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 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 temperatures and phase change heats of binary systems were studied experimentally by differential scaning calorimeter(DSC). The feasibility of the binary polyalcohols system used in the building envelope was analyzed. Results can provide the basis for the application of solid-solid phase change materials to the building field.